N-EUPEX®

N-EUPEX-DS®

Flexible Couplings

2

Table of Contents1. Introduction:

Table of Contents 2N-EUPEX Selection Process 2Service Factor Guidelines 3Summary of Basic Types 4Special Designs 5NEMA Motor Reference &

N-EUPEX Selection Chart 5

2. Couplings:

Types B and A 6Type H 7Types E and D 8

Type M 9N-EUPEX-DS Summary 10N-EUPEX-DS – NEMA Motor Reference &

Selection Chart 10N-EUPEX-DS 11

3. Engineering:

Shaft to Hub Fits 12Common Practices 13

4. Coupling Installation 14

5. Coupling Maintenance 15

6. Flender Coupling Product Overview 16

Flender N-EUPEX Selection Process

� Determine HP Capacity Per 100 RPM:

1. Select the appropriate service factor (SF) foryour application (see page 3).

2. Calculate the coupling HP capacity per 100 RPM:

HP per 100 RPM = �HP ×

R1P0M0 × SF�

Select a coupling with the same or highercapacity from the HP per 100 RPM column fromthe tables on pages 6–11.

� Check Bore Limitations:

1. Determine each hub’s maximum bore diameterfor the selected coupling from the tables onpages 6–11.

2. Confirm that both shaft ends of your applicationdo not exceed the maximum coupling borediameters.

� Check Speed Limitations:

1. Determine the maximum speed of the selectedcoupling from the tables on pages 6–11.

2. Confirm your actual speed does not exceed thecoupling’s maximum speed.

� Check Critical Dimensions:

Check the coupling’s OD, overall length, shaftseparation, etc. to determine if it will fit yourapplication.

� Check Overload Capacity:

1. Maximum torque may occur for a short period oftime (i.e. during start-up, motor short circuit, etc.).

2. This maximum torque should not exceed threetimes the N-EUPEX coupling’s nominal torquerating.

Example:

� Motor—40 HP; 3,600 RPM; 1.875" shaft� Centrifugal pump—1.375" shaft� DBSE = 3.5 inches� Operation is 8 hours per day

� Determine HP Capacity Per 100 RPM:

1. An N-EUPEX coupling is selected to connect anelectric motor to a centrifugal pump. Theapplication and hours of operation result in SF = 1.00

2. HP per 100 RPM = �40 ×

3,160000

× 1� = 1.11 HP

Since a (Type H) spacer coupling is needed, an H 95 is selected with a rating of 1.5 HP per 100 RPM.

� Check Bore Limitations:

The motor shaft is 1.875" while the H 95 maximumbore is only 1.625". Therefore, the selection mustbe changed to an H 125 with a 2.125" maximum bore.

� Check Speed Limitations:

The H 125 has a maximum speed of 5,000 RPM—OK.

� Check Critical Dimensions:

Specify the 3.5" S3 dimension. All otherdimensions are OK.

� Check Overload Capacity:

Service factor was sufficient to handle expectedoverloads.

� If further assistance is required, contact your local

Flender representative or Flender sales office.

� NOTE: For additional information, see NEMAMotor Reference and N-EUPEX Selection Chart

(pages 5 & 10).

3

N-EUPEX Flexible Couplings—Service Factor GuildelinesGeneral service factor guidelines are based on AGMA tables developed by assessing the input and output factors, as well asthe demand of various applications. Specific design data or vibration calculations can be obtained from Flender, upon request.

Service factors for gear drives driven by motors (hydraulic or electric) and turbines (steam or gas) see Note 3.

Application Load Duration (hrs/day) Application Load Duration (hrs/day) Application Load Duration (hrs/day) Application Load Duration (hrs/day)up to 3 10 24 up to 3 10 24 up to 3 10 24 up to 3 10 24

Agitators (Mixers) Extruders Metal Strip Processing Machinery Plastics Industry (cont)Pure Liquids 1.00 1.00 1.25 General 1.50 1.50 1.50 Bridles 1.25 1.25 1.50 Primary ProcessingLiquids and Solids 1.00 1.25 1.50 Plastics Coilers & Uncoilers 1.00 1.00 1.25 Batch Drop MillLiquids - Variable Density 1.00 1.25 1.50 - vari. Speed drive 1.50 1.50 1.50 Edge Trimmers 1.00 1.25 1.50 - 2 smooth rolls 1.25 1.25 1.25

Blowers - fixed Speed drive 1.75 1.75 1.75 Flatteners 1.25 1.25 1.50 Cont Feed, Holding Centrifugal 1.00 1.00 1.25 Rubber Loopers (accumulators) 1.00 1.00 1.25 & Blend Mill 1.25 1.25 1.25Lobe 1.00 1.25 1.50 - cont. screw opr. 1.75 1.75 1.75 Pinch Rolls 1.25 1.25 1.50 Compounding Mill 1.25 1.25 1.25Vane 1.00 1.25 1.50 - intermit. Screw opr. 1.75 1.75 1.75 Scrap Choppers 1.25 1.25 1.50 Calenders 1.50 1.50 1.50

Brewing & Distilling Fans Shears 2.00 2.00 2.00 Secondary ProcessingBottling Machinery 1.00 1.00 1.25 Centrifugal 1.00 1.00 1.25 Slitters 1.00 1.25 1.50 Blow Molders 1.50 1.50 1.50Brew Kettles - cont. duty 1.25 1.25 1.25 Cooling Towers 2.00 2.00 2.00 Mills, Rotary Type Coating 1.25 1.25 1.25Cookers - cont. duty 1.25 1.25 1.25 Forced Draft 1.25 1.25 1.25 Ball & Rod Film 1.25 1.25 1.25Mash Tubs - cont. duty 1.25 1.25 1.25 Induced Draft 1.50 1.50 1.50 Spur ring gear 2.00 2.00 2.00 Pipe 1.25 1.25 1.25Scale Hopper - frequent starts 1.25 1.25 1.50 Industrial & Mine 1.50 1.50 1.50 Helical ring gear 1.50 1.50 1.50 Pre-Plasticizers 1.50 1.50 1.50

Can Filling Machines 1.00 1.00 1.25 Feeders Direct connected 2.00 2.00 2.00 Rods 1.25 1.25 1.25Car Dumpers 1.50 1.75 2.00 Apron 1.00 1.25 1.50 Cement Kilns 1.50 1.50 1.50 Sheet 1.25 1.25 1.25Car Pullers 1.00 1.25 1.50 Belt 1.00 1.25 1.50 Dryers and coolers 1.50 1.50 1.50 Tubing 1.25 1.25 1.50Clarifiers 1.00 1.00 1.25 Disc 1.00 1.00 1.25 Mixers Pullers - Barge Haul 1.25 1.25 1.50Clay Working Machinery Reciprocating 1.50 1.75 2.00 Concrete 1.25 1.25 1.50 Pumps

Brick Press 1.50 1.75 2.00 Screw 1.00 1.25 1.50 Paper Mills (see note 2) Centrifugal 1.00 1.00 1.25Briquette Machine 1.50 1.75 2.00 Food Industry Agitator (mixer) 1.50 1.50 1.50 Proportioning 1.25 1.25 1.50Pug Mill 1.00 1.25 1.50 Cereal Cooker 1.00 1.00 1.25 Agitator for Pure Liquors 1.25 1.25 1.25 Reciprocating

Compactors 2.00 2.00 2.00 Dough Mixer 1.25 1.25 1.50 Barking drums 2.00 2.00 2.00 - sgl acting, 3+ cyl. 1.25 1.25 1.50Compressors Meat Grinders 1.25 1.25 1.50 Barkers - mechanical 2.00 2.00 2.00 - dbl acting, 2+ cyl. 1.25 1.25 1.50

Centrifugal 1.00 1.00 1.25 Slicers 1.25 1.25 1.50 Beater 1.50 1.50 1.50 Rotary - Gear, Lobe or Vane 1.00 1.00 1.25Lobe 1.00 1.25 1.50 Generators & Exciters 1.00 1.00 1.25 Breaker Stack 1.25 1.25 1.25 Rubber IndustryReciprocating Hammer Mills 1.75 1.75 2.00 Calender Intensive Internal Mixer—multi-cyl 1.50 1.50 1.75 Hoists - anti-friction brgs 1.25 1.25 1.25 - batch mixers 1.75 1.75 1.75—single-cyl 1.75 1.75 2.00 Heavy Duty 1.75 1.75 2.00 - sleeve brgs 1.50 1.50 1.50 - continuous 1.50 1.50 1.50

Conveyors - General Purpose Medium Duty 1.25 1.25 1.50 Chipper 2.00 2.00 2.00 Mixing MillUniformly loaded or fed 1.00 1.00 1.25 Skip Hoist 1.25 1.25 1.50 Chip Feeder 1.50 1.50 1.50 - 2 smooth rolls 1.50 1.50 1.50Heavy duty - not uniformly fed 1.25 1.25 1.50 Laundry Coating Rolls 1.25 1.25 1.25 - with corrugated rolls 1.75 1.75 1.75Reciprocating or Shaker 1.75 1.75 2.00 Tumblers 1.25 1.25 1.50 Conveyors Batch Drop Mills

Cranes (see note 1) Washers 1.50 1.50 2.00 - chip, bark, chemical 1.25 1.25 1.25 - 2 smooth rolls 1.50 1.50 1.50Dry Dock Lumber Industry - log (including slab) 2.00 2.00 2.00 Cracker Warmer

Main Hoist 2.50 2.50 2.50 Barkers Couch Rolls 1.25 1.25 1.25 -1 corrugated roll 1.75 1.75 1.75Auxiliary Hoist 2.50 2.50 3.00 - spindle feed 1.25 1.25 1.50 Cutter 2.00 2.00 2.00 CrackerBoom Hoist 2.50 2.50 3.00 - main drive 1.75 1.75 1.75 Cylinder Molds 1.25 1.25 1.25 - 2 corrugated rolls 2.00 2.00 2.00Slewing Drive 2.50 2.50 3.00 Conveyors - burners 1.25 1.25 1.50 Dryers, Paper Mach Holding FeedTraction Drive 3.00 3.00 3.00 - main or heavy duty 1.50 1.50 1.50 - anti-friction brgs 1.25 1.25 1.25 & Blend Mill-2 rolls 1.25 1.25 1.25

Container - main log 1.75 1.75 2.00 - sleeve brgs 1.50 1.50 1.50 Refiner - 2 rolls 1.50 1.50 1.50Main Hoist 3.00 3.00 3.00 - re-saw, mry go md 1.25 1.25 1.50 Dryers, Conveyor Calenders 1.50 1.50 1.50Boom Hoist 2.00 2.00 2.00 Conveyors - anti-friction brgs 1.25 1.25 1.25 Sand Muller 1.25 1.25 1.50Trolley Drive - slab 1.75 1.75 2.00 - sleeve brgs 1.50 1.50 1.50 Sewage Disposal Equipment

Gantry Drive 3.00 3.00 3.00 - transfer 1.25 1.25 1.50 Embosser 1.25 1.25 1.25 Bar Screens 1.25 1.25 1.25Traction Drive 2.00 2.00 2.00 Chains Extruder 1.50 1.50 1.50 Chemical Feeders 1.25 1.25 1.25

Mill Duty - floor 1.50 1.50 1.50 Fourdrinier Rolls 1.25 1.25 1.25 Dewatering Screens 1.50 1.50 1.50Main Hoist 3.50 3.50 3.50 - green 1.50 1.50 1.75 Jordan 1.50 1.50 1.50 Scum Breakers 1.50 1.50 1.50Auxiliary Hoist 3.50 3.50 3.50 Cut-off saws Kiln Drive 1.50 1.50 1.50 Slow or Rapid Mixers 1.50 1.50 1.50Bridge 2.50 3.00 3.00 - chain & drag 1.50 1.50 1.75 Mt. Hope Roll 1.25 1.25 1.25 Sludge Collectors 1.25 1.25 1.25Trolley Travel 2.50 3.00 3.00 Debarking Drums 1.75 1.75 2.00 Paper Rolls 1.25 1.25 1.25 Thickeners 1.50 1.50 1.50

Industrial Duty Feeds Platter 1.50 1.50 1.50 Vacuum Filters 1.50 1.50 1.50Main Hoist 2.50 2.50 3.00 - edger 1.25 1.25 1.50 Presses - felt & suction 1.25 1.25 1.25 ScreensAuxiliary Hoist 2.50 2.50 3.00 - gang 1.75 1.75 1.75 Pulper 2.00 2.00 2.00 Air Washing 1.00 1.00 1.25Bridge 2.50 3.00 3.00 - trimmer 1.25 1.25 1.50 Pumps - vacuum 1.50 1.50 1.50 Rotary -stone or gravel 1.25 1.25 1.50Trolley Travel 2.50 3.00 3.00 Log Deck 1.75 1.75 1.75 Reel - surface type 1.25 1.25 1.25 Traveling Water Intakes 1.00 1.00 1.25

Crusher - Stone or Ore 1.75 1.75 2.00 Log Haul Screens Sugar IndustryDredges - incline - well type 1.75 1.75 1.75 - chip 1.50 1.50 1.50 Beet Slicer 2.00 2.00 2.00

Cable Reels 1.25 1.25 1.50 Log Turning Devices 1.75 1.75 1.75 - rotary 1.50 1.50 1.50 Cane Knives 1.50 1.50 1.50Conveyors 1.25 1.25 1.50 Planer Feed 1.25 1.25 1.50 - vibrating 2.00 2.00 2.00 Crushers 1.50 1.50 1.50Cutter Head Drives 2.00 2.00 2.00 Planer Tilting Hoists 1.50 1.50 1.50 Size Press 1.25 1.25 1.25 Mills - low speed end 1.75 1.75 1.75Pumps 2.00 2.00 2.00 Rolls Super Calender 1.25 1.25 1.25 Textile IndustryScreen Drives 1.75 1.75 2.00 - Live-off brg, - roll cases 1.75 1.75 1.75 Thickener Batchers 1.25 1.25 1.50Stackers 1.25 1.25 1.50 Sorting Tables 1.25 1.25 1.50 - AC motor 1.50 1.50 1.50 Calenders 1.25 1.25 1.50Winches 1.25 1.25 1.50 Tipple Hoists 1.25 1.25 1.50 - DC motor 1.25 1.25 1.25 Cards 1.25 1.25 1.50

Elevators Transfers Washer Dry Cans 1.25 1.25 1.50Bucket 1.00 1.25 1.50 - chain or craneway 1.50 1.50 1.75 - AC motor 1.50 1.50 1.50 Dryers 1.25 1.25 1.50Centrifugal Discharge 1.00 1.00 1.25 Tray Drives 1.25 1.25 1.50 - DC motor 1.25 1.25 1.25 Dyeing Machinery 1.25 1.25 1.50Escalators 1.00 1.00 1.25 Veneer Lathe Drives 1.25 1.25 1.50 Wind & Unwind Stand 1.00 1.00 1.00 Looms 1.25 1.25 1.50Freight 1.00 1.25 1.50 Metal Mills Winders - surface type 1.25 1.25 1.25 Mangles 1.25 1.25 1.50Gravity Discharge 1.00 1.00 1.25 Draw bench carriage & main 1.25 1.25 1.50 Yankee Dryers Nappers 1.25 1.25 1.50

Runout tables, non-reversing - anti-friction brgs 1.25 1.25 1.25 Pads 1.25 1.25 1.50- group drives 1.50 1.50 1.50 - sleeve brgs 1.50 1.50 1.50 Slashers 1.25 1.25 1.50- individual drives 2.00 2.00 2.00 Plastics Industry Soapers 1.25 1.25 1.50Reversing Mills 2.00 2.00 2.00 Primary Processing Spinners 1.25 1.25 1.50Slab Pushers 1.50 1.50 1.50 Intensive Mixers Tenter Frames 1.25 1.25 1.50Shears 2.00 2.00 2.00 - batch 1.75 1.75 1.75 Washers 1.25 1.25 1.50Wire Drawing 1.25 1.25 1.50 - continuous 1.50 1.50 1.50 Winders 1.25 1.25 1.50Wire Winding Machines1.25 1.50 1.50

Note 1: Crane drives are to be selected based on gear tooth bending strength. Contact Flender for strength ratings.Note 2: Service factors for paper mill applicatons are applied to the nameplate rating of the electric drive motor at motor base speed.Note 3: For multi-cylinder engines multiply service factors by 1.25.

Table 3.1

4

N-EUPEX Flexible CouplingsSummary of Basic Types

N-EUPEX couplings are the ultimate solution for a wide variety of applications. Theyare extremely reliable in the transmission of torque and excellent for overloadprotection. Their unique design makes them quick and simple to install, and allowsfor easy inspection and replacement of the flexible elements. The synthetic rubbercomposition of the flexible elements provides excellent dampening characteristics.The N-EUPEX features provide a wide range of benefits.� No lubrication is needed, reducing maintenance costs and contamination concerns� Misalignment protection reduces excessive wear on driving/driven equipment� Torsional vibration and shock loads are dampened to extend the life of

connected equipment� Higher torque density and bore capacity than most other elastomeric designs� Torque is uniformly transmitted to give higher reliability & longer coupling life� Compact design results in low weight and low mass moment of inertia� No special tools are needed for installation or alignment� Available in both failsafe and non-failsafe designs

The more common N-EUPEX coupling types are listed below. Various additional special types are also available.

Type B (two piece design)Type A (three piece design—replace flexibleelements without disassembly of power train)

� Used to connect two shafts for mostgeneral industrial applications (i.e. gear units, fans, motors etc.)— has a failsafe flexible hub

� Type B—up to a 4.125 inch bore� Type A—up to a 10.250 inch bore

Type H with spacer (with intermediate sleeve)

� Used to connect two shafts that are alarge distance apart (i.e. pumps, etc.)

� Type H—up to a 3.750 inch bore

� Covering a distance between shafts

— from 3.500 inches

— to 9.843 inches

Type D, E and M—(Flexible Element Flange—with a type B (one piece) hub, type A (two piece) hub or special hub)

� Used to connect a shaft to various applications by using a bolt-onflange (i.e. generators, etc.)

� Type D—Flange w/ type A (two piece) hub—up to a 7.500 inch bore

� Type E—Flange w/ type B (one piece) hub—up to a 4.125 inch bore

� Type M—Flange w/ one piece special hub—up to a 4.500 inch bore

Type BDS and ADS

(Type B & A—has a non-failsafe flexible hub)

— Non-sparking (meets API 610)

� Used to connect two shafts in ahazardous area (i.e. API pumps, fans,general equipment, etc.)

� Type BDS—up to a 4.125 inch bore

� Type ADS—up to a 7.500 inch bore

B Sizes 58 to 280 A Sizes 110 to 350 A Sizes 400 to 710

D Sizes 110 E Sizes 68 M Sizes 125to 520 to 280 to 350

H Sizes 80 to 250

BDS Sizes 66 to 305 ADS Sizes 118 to 556

5

143T0.875

1⁄258

3.60 3⁄458

3.20 158

3.60 158

3.60 11⁄258

4.80 11⁄258

4.80145T 3⁄4 2.40 1 2.40 11⁄2 2.40 11⁄2 2.40 2–3 2.40 2 3.60182T

1.1251

683.60 11⁄2

683.20 3

682.40 3

682.40 5

682.88 3

684.80

184T 11⁄2 2.40 2 2.40 5 1.44 5 1.44 71⁄2 1.92 5 2.88213T

1.3752

803.60 3

803.20 71⁄2

801.92 71⁄2

801.92 10

802.88 71⁄2

803.84

215T 3 2.40 5 1.92 10 1.44 10 1.44 15 1.92 10 2.88254T

1.6255

952.52 71⁄2

952.24 15

951.68 15

951.68 20

952.52 15

953.36

256T 71⁄2 1.68 10 1.68 20 1.26 20 1.26 25 2.01 20 2.52284T

1.87510

1101.98 15

1101.76 25

1101.58 25

1101.58 30

1102.64 25

1103.16

286T 15 1.32 20 1.32 30 1.32 30 1.32 40 1.98 30 2.64324T

2.12520

1251.48 25

1251.58 40

1251.48 40

1251.48 50

1252.37 40

1252.97

326T 25 1.18 30 1.32 50 1.18 50 1.18 60 1.98 50 2.37364T

2.37530

1602.37 40

1602.37 60

1602.37 60

1602.37 75

1603.79 60

1604.74

365T 40 1.77 50 1.89 75 1.89 75 1.89 100 2.84 75 3.79404T

2.87550

1802.16 60

1802.40 100

1802.16 — — — 125

1803.45 —- — —

405T 60 1.80 75 1.92 125 1.72 100 180 2.16 150 2.88 100 180 4.32444T

3.37575

2253.36 100

2253.36 150

2253.36 125

2254.03 200 Over 125 Over

445T 100 2.52 125 2.68 200 2.52 150 3.36 250 Max. Speed 150 Max. Speed

NEMA Motor Reference & N-EUPEX Selection ChartTable 5.1

284TS1.625

10 95 1.26 15 95 1.12 25 95 1.00 25 95 1.00 3095

1.68 2595

2.01286TS 15 110 1.32 20 110 1.32 30 110 1.32 30 110 1.32 40 1.26 30 1.68324TS 20

1251.48 25

1251.58 40

1251.48 40

1251.48 50 1.58 40 1.98

326TS 25 1.18 30 1.32 50 1.18 50 1.18 60 110 1.32 50 1.58364TS

1.87530

1401.53 40

1401.53 60

1401.53 60

1401.53 75 1.05 60

1101.32

365TS 40 1.15 50 1.22 75 1.22 75 1.22 100 125 1.18 75 1.05404TS

2.12550

1601.42 60 140 1.02 100

1601.42 — — — 125

1401.46 — — —

405TS 60 1.18 75 160 1.26 125 1.13 100 160 1.42 150 1.22 100 125 1.18444TS

2.37575

1801.44 100

1801.44 150

1801.44 125 160 1.13 200

1601.42 125

1602.27

445TS 100 1.08 125 1.15 200 1.08 150 180 1.44 250 1.13 150 1.89

*NOTE: Service Factors are calculated by using the HP rating.Selections are made with consideration given to both the maximum bore diameter and coupling HP rating

NEMAFrameSize

ShaftDia.(in.)

HP

N-E

UP

EX

Ser

vice

Fact

or*Motor

900 RPM

Drip P. & Enclosed

HP

N-E

UP

EX

Ser

vice

Fact

or*

1200 RPM

Drip P. & Enclosed

HP

N-E

UP

EX

Ser

vice

Fact

or*

1800 RPM

Drip Proof Enclosed

HP

N-E

UP

EX

Ser

vice

Fact

or*

HP

N-E

UP

EX

Ser

vice

Fact

or*

3600 RPM

Drip Proof Enclosed

HP

N-E

UP

EX

Ser

vice

Fact

or*

N-EUPEX Flexible Couplings Special DesignsN-EUPEX couplings are supplied in additional designs for various types of more specialized applications.Some examples of the more common types are shown below.

Types L and K(with brake drum)

Types O and P(with flange mount brake drumand flange)

Types B and A(with brake disk)

Types G and F(with flanged rigid hub and flange)

6

Sizes 58 to 280

Part 1 Part 1

Part 4 Part 3

Part 2

Sizes 110 to 350 Sizes 400 to 710

N-EUPEX Types B and A Flexible Couplings—Fail-safe Design� Type B (two piece design)—Type A (three piece design)See page 5 for Selection Chart.

B 58 0.2 168 5,000 0.750 2.28 0.8 2.28 0.938 1.57 0.3 0.8 0.1 0.2 0.5 0.5 1.0B 68 0.4 301 5,000 0.938 2.68 0.8 2.68 1.125 1.97 0.3 0.8 0.1 0.2 0.7 0.7 1.4B 80 0.8 531 5,000 1.188 3.15 1.2 3.15 1.500 2.68 0.4 1.2 0.1 0.2 1.7 1.6 3.3B 95 1.4 885 5,000 1.625 2.99 1.2 3.74 1.625 2.99 0.5 1.4 0.1 0.2 2.6 3.1 5.7B 110 2.2 1,416 5,000 1.813 3.39 1.3 4.33 1.875 3.39 0.6 1.6 0.1 0.2 4.2 4.4 9B 125 3.3 2,124 5,000 2.125 3.94 1.4 4.92 2.125 3.94 0.7 2.0 0.1 0.2 6 7 14B 140 5.1 3,186 4,900 2.250 3.94 1.3 5.51 2.250 3.94 0.8 2.2 0.1 0.2 7 8 15B 160 7.9 4,957 4,250 2.375 4.25 1.5 6.30 2.375 4.25 0.8 2.4 0.1 0.2 10 10 21B 180 12 7,789 3,800 2.875 4.92 1.7 7.09 2.875 4.92 0.8 2.8 0.1 0.2 15 16 31B 200 18 11,860 3,400 3.250 5.51 1.9 7.87 3.250 5.51 0.9 3.1 0.1 0.2 21 23 44B 225 28 17,702 3,000 3.375 5.91 2.0 8.86 3.375 5.91 0.7 3.5 0.1 0.2 25 29 54B 250 38 24,783 2,750 1.73 3.750 6.50 2.4 9.84 1.73 3.750 6.50 0.7 3.9 0.1 0.3 39 36 75B 280 55 34,519 2,450 1.85 4.125 7.09 2.6 11.02 2.05 4.125 7.09 0.8 4.3 0.1 0.3 53 46 99

A 110 2.2 1,416 5,000 1.813 3.39 1.3 4.33 1.438 2.44 0.8 1.6 1.3 0.1 0.2 4 4 8A 125 3.3 2,124 5,000 2.125 3.94 1.4 4.82 1.750 2.95 0.9 2.0 1.5 0.1 0.2 6 6 12A 140 5.1 3,186 4,900 2.250 3.94 1.3 5.51 1.875 3.23 1.1 2.2 1.7 0.1 0.2 7 8 15A 160 7.9 4,957 4,250 2.375 4.25 1.5 6.30 2250 3.74 1.1 2.4 1.9 0.1 0.2 10 11 22A 180 12 7,789 3,800 2.875 4.92 1.7 7.09 2.375 4.25 1.2 2.8 2.0 0.1 0.2 15 16 31A 200 18 11,860 3,400 3.250 5.51 1.9 7.87 2.875 4.80 1.3 3.1 2.1 0.1 0.2 21 23 44A 225 28 17,702 3,000 3.375 5.91 2.0 8.86 3.250 5.43 1.5 3.5 2.4 0.1 0.2 29 31 60A 250 38 24,783 2,750 1.73 3.750 6.50 2.4 9.84 1.18 3.625 6.10 1.7 3.9 2.7 0.1 0.3 39 43 82A 280 55 34,519 2,450 1.85 4.125 7.09 2.6 11.02 2.05 4.000 6.77 1.7 4.3 2.9 0.1 0.3 53 53 106

1.85 3.750 6.50 1.73 3.750 6.50 68 71 139A 315 77 48,681 2,150

3.46 4.625 7.872.8 12.40

3.46 4.625 7.871.9 4.9 3.1 0.1 0.3

71 75 1462.32 4.000 7.09 2.32 4.000 7.09 95 95 190

A 350 108 68,153 1,9503.46 5.500 9.06

2.9 13.783.46 5.500 9.06

2.0 5.5 3.3 0.1 0.399 104 203

2.52 4.500 7.87 2.52 4.500 7.87 139 130 269A 400 147 91,165 1,700

3.86 5.875 9.843.1 15.75

3.86 5.875 9.842.2 6.3 3.5 0.1 0.3

146 141 2873.07 4.750 8.46 3.07 4.750 8.46 174 176 351

A 440 187 119,489 1,5504.65 5.125 10.43

3.4 17.324.65 6.125 10.43

2.5 7.1 3.9 0.2 0.4181 187 368

3.46 5.375 9.45 3.46 5.375 9.45 221 221 441A 480 228 146,927 1,400

5.28 7.000 11.813.5 18.90

5.28 7.000 11.812.6 7.5 4.1 0.2 0.4

232 243 4743.86 5.500 9.84 3.86 5.500 9.84 287 265 551

A 520 295 187,641 1,3005.43 7.500 12.40

4.0 20.475.43 7.500 12.40

2.7 8.3 4.5 0.2 0.4309 298 606

A 560 402 256,679 1,200 4.65 7.875 12.60 4.5 22.05 4.65 7.875 12.60 3.1 8.7 4.9 0.2 0.5 397 408 805A 610 536 336,338 1,100 5.04 8.625 13.86 4.8 24.02 5.04 8.625 13.86 3.5 9.4 5.3 0.2 0.5 496 529 1,025A 660 684 433,699 1,000 5.43 9.500 15.12 5.2 25.98 5.43 9.500 15.12 3.8 10.2 5.7 0.2 0.5 639 706 1,345A 710 871 548,762 950 5.43 10.250 16.38 5.4 27.95 5.43 10.250 16.38 4.0 11.4 6.1 0.2 0.5 816 882 1,698

D1 d2 u1 da D1 d2 w1 l1 P S1 WeightFlexible Hub (Part 1) Pin Hub (Parts 4 or 2 & 3) Lngth Reqd Distance (with medium size bore)

HP/ Nominal Max Bore Hub Width Cplg Bore Hub Width Thru Bolt Betwn Hubs Part100 Torque Speed Pilot Max OD @OD OD Pilot Max OD @ OD Bore Clear min. max. 1 4/2&3 Total

TypeSize RPM (lbs.-in.) (RPM) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (lbs.) (lbs.) (lbs.)

So

lidS

olid

So

lidS

olid

Do

es N

ot

Ap

ply

Table 6.1

Type B (two piece design) Type A (three piece design)—replace flexible elements without disassembly of power train

7

2.99 3.50 4.4 6.2H 80 0.8 531 5,000 1.188 3.15 1.18 1.18 0.39 3.15 2.01

4.491.250 2.17 1.77 0.35 0.20

5.001.8

6.0 6.42.99 3.50 6.6 8.6

H 95 1.5 885 5,000 1.625 2.99 1.38 1.18 0.39 3.74 2.484.49

1.625 2.76 1.77 0.35 0.205.00

2.68.6 9.3

2.91 1.97 3.50 9.5 13H 110 2.3 1,416 5,000 1.813 3.39 1.57 1.34 0.47 4.33 2.87 4.41 1.813 3.15 1.97 0.43 0.20 5.00 4.2 10 14

6.50 2.36 7.08 12 152.91 1.97 3.50 12 184.41 1.97 5.00 13 19

H 125 3.4 2,124 5,000 2.125 3.94 1.97 1.42 0.47 4.82 3.35 6.50 2.125 3.54 2.36 0.43 0.20 7.09 6.4 14 207.28 2.76 7.87 15 219.25 3.15 9.84 16 222.79 2.56 3.50 18 254.28 2.56 5.00 19 26

H 140 5.1 3,186 4,900 2.250 3.94 2.17 1.34 0.59 5.51 3.58 6.38 2.250 3.94 2.56 0.59 0.20 7.09 7.3 20 277.17 2.56 7.87 21 289.13 3.15 9.84 22 292.77 2.76 3.50 22 324.27 2.76 5.00 23 34

H 160 7.9 4,957 4,250 2.375 4.25 2.36 1.54 0.59 6.30 4.37 6.36 2.375 4.25 2.76 0.59 0.24 7.09 10 25 357.15 2.76 7.87 26 369.11 3.15 9.84 28 384.27 5.00 31 466.36 7.09 33 48

H 180 12.3 7,789 3,800 2.875 4.92 2.76 1.65 0.59 7.09 5.167.15

2.875 4.92 3.15 0.59 0.247.87

1534 49

9.11 9.84 36 524.15 5.00 43 646.24 7.09 46 67

H 200 18.8 11,860 3,400 3.250 5.51 3.15 1.85 0.71 7.87 5.677.03

3.250 5.51 3.54 0.71 0.247.87

2147 68

9.00 9.84 50 714.15 5.00 56 846.24 7.09 57 86

H 225 28.2 17,702 3,000 3.375 5.91 3.54 2.05 0.71 8.86 6.657.03

3.375 5.91 3.94 0.71 0.247.87

2959 88

9.00 9.84 63 926.00 7.09 79 118

H 250 38.9 24,783 2,750 1.73 3.750 6.50 3.94 2.36 0.91 9.04 7.28 6.79 1.73 3.750 6.50 4.33 0.83 0.31 7.87 39 82 1218.76 9.84 86 125

D1 d2 l1 u1 w2 da d4 Lz D1 d2 l2 w3 S2 S3 WeightFlexible Hub (Part 1) Pt 7 Spacer (Part 2) Hub (Part 5) Btwn (with medium size bore)

HP/ Nominal Max Bore Hub Lngth Wdth Wdth Cplg Bore Hub Lngth Wdth Shaft Part100 Torque Speed Pilot Max OD Thru Bore @OD @OD OD OD Lngth Pilot Max OD Thru Bore @OD Gap Ends 1 5+6+7 Total

TypeSize RPM (lbs.-in.) (RPM) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (lbs.) (lbs.) (lbs.)

So

lid

So

lid

N-EUPEX Type H Flexible Couplings—Fail-safe Design� Type H with spacer (intermediate sleeve)See page 5 for Selection Chart.

Part 1

S3 = Space between shaftsLZ = Length of intermediate sleeve

Part 6Part 7

Part 5

Table 7.1

Type H with intermediate sleeve—replace flexible elements withoutdisassembly of power train

8

E 68 0.5 301 5,000 3.54 3.15 1.339 0.217 M5 6 0.276 0.8 2.68 1.97 1.125 0.8 0.3 0.079 0.157 1.5E 80 0.8 531 5,000 4.17 3.70 1.654 0.260 M6 6 0.315 0.8 3.15 2.68 1.500 1.2 0.4 0.079 0.157 3.0E 95 1.5 885 5,000 4.72 4.25 2.047 0.260 M6 6 0.315 0.9 3.74 2.99 1.625 1.4 0.5 0.079 0.157 4.6E 110 2.3 1,416 5,000 5.67 5.04 2.441 0.354 M8 6 0.394 1.1 4.33 3.39 1.875 1.6 0.6 0.079 0.157 7.1E 125 3.4 2,124 5,000 6.22 5.59 2.953 0.354 M8 6 0.394 1.2 4.92 3.94 2.125 2.0 0.7 0.079 0.157 10.6E 140 5.1 3,186 4,900 7.09 6.30 3.228 0.433 M10 6 0.512 1.3 5.51 3.94 2.250 2.2 0.8 0.079 0.157 13.7E 160 7.9 4,957 4,250 7.87 7.09 3.740 0.433 M10 7 0.512 1.5 6.30 4.25 2.375 2.4 0.8 0.079 0.236 17.6E 180 12.3 7,789 3,800 8.66 7.87 4.331 0.433 M10 8 0.512 1.7 7.09 4.92 2.875 2.8 0.8 0.079 0.236 25.4E 200 18.8 11,860 3,400 9.76 8.82 4.724 0.551 M12 8 0.630 1.9 7.87 5.51 3.250 3.1 0.9 0.079 0.236 36.4E 225 28.2 17,702 3,000 10.79 9.84 5.315 0.551 M12 8 0.630 2.0 8.86 5.91 3.375 3.5 0.7 0.079 0.236 41.9E 250 38.9 24,783 2,750 12.36 11.10 5.906 0.709 M16 8 0.787 2.4 9.84 6.50 1.73 3.750 3.9 0.7 0.118 0.315 61.7E 280 55.0 34,519 2,450 13.54 12.28 6.693 0.709 M16 8 0.787 2.6 11.02 7.09 2.05 4.125 4.3 0.8 0.118 0.315 77.2

D 110 2.3 1,416 5,000 5.67 5.04 2.441 0.354 M8 6 0.394 1.1 4.33 2.44 1.438 1.6 0.8 1.3 0.079 0.157 6D 125 3.4 2,124 5,000 6.22 5.59 2.953 0.354 M8 6 0.394 1.2 4.92 2.95 1.750 2.0 0.9 1.5 0.079 0.157 9D 140 5.1 3,186 4,900 7.09 6.30 3.228 0.433 M10 6 0.512 1.3 5.51 3.23 1.875 2.2 1.1 1.7 0.079 0.157 13D 160 7.9 4,957 4,250 7.87 7.09 3.740 0.433 M10 7 0.512 1.5 6.30 3.74 2.250 2.4 1.1 1.9 0.079 0.236 18D 180 12.3 7,789 3,800 8.66 7.87 4.331 0.433 M10 8 0.512 1.7 7.09 4.25 2.375 2.8 1.2 2.0 0.079 0.236 25D 200 18.8 11,860 3,400 9.76 8.82 4.724 0.551 M12 8 0.630 1.9 7.87 4.80 2.875 3.1 1.3 2.1 0.079 0.236 35D 225 28.2 17,702 3,000 10.79 9.84 5.315 0.551 M12 8 0.630 2.0 8.86 5.43 3.250 3.5 1.5 2.4 0.079 0.236 47D 250 38.9 24,783 2,750 12.36 11.10 5.906 0.709 M16 8 0.787 2.4 9.84 6.10 1.18 3.625 3.9 1.7 2.7 0.118 0.315 68D 280 55.0 34,519 2,450 13.54 12.28 6.693 0.709 M16 8 0.787 2.6 11.02 6.77 2.05 4.000 4.3 1.7 2.9 0.118 0.315 84

6.50 1.73 3.750 111D 315 77.8 48,681 2,150 14.96 13.70 7.874 0.709 M16 9 0.866 2.8 12.40

7.87 3.46 4.6254.9 1.9 3.1 0.118 0.315

1167.09 2.32 4.000 150

D 350 108.6 68,153 1,950 16.93 15.35 8.858 0.866 M20 9 0.984 2.9 13.789.06 3.46 5.500

5.5 2.0 3.3 0.118 0.315159

7.87 2.52 4.500 201D 400 147.5 91,165 1,700 18.90 17.32 10.433 0.866 M20 10 0.984 3.1 15.75

9.84 3.86 5.8756.3 2.2 3.5 0.118 0.315

2128.46 3.07 4.750 265

D 440 187.7 119,489 1,550 20.47 18.90 11.614 0.866 M20 10 0.984 3.4 17.3210.43 4.65 6.125

7.1 2.5 3.9 0.197 0.394276

9.45 3.46 5.375 337D 480 228.0 146,927 1,400 22.64 20.79 12.795 1.024 M24 10 1.181 3.5 18.90

11.81 5.28 7.0007.5 2.6 4.1 0.197 0.394

3599.84 3.86 5.500 408

D 520 295.0 187,641 1,300 24.21 22.36 13.976 1.024 M24 10 1.181 4.0 20.4712.40 5.43 7.500

8.3 2.7 4.5 0.197 0.394441

d3 k D2 s1 c u2 da d2 D1 l1 w1 P S1

Flange dimensions Pin Hub dimensions DistanceBolt # of Width Lgth Bore Lgth WdthReqd Between

HP/ Nominal Max OD Hole Bore Hole Bolt Bolt at Thru Cplng Hub Part 4 or 2 Thru @ Bolt the Hubs Wt.100 Torque Speed h8 Cntr H7 Size Size Holes OD Bore OD OD Pilot Max Bore OD Clrnce min max Total

TypeSize RPM (lbs.-in.) (RPM) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (lbs.)S

olid

Do

es N

ot

Ap

ply

So

lid

Sizes 68 to 280

Part 10 Part 10

Part 4

Part 3

Part 2

Sizes 110 to 350 Sizes 400 to 520

Table 8.1

N-EUPEX Types D and E Flexible Couplings—Fail-safe Design� Type D & E to connect a shaft using a bolt-on flangeSee page 5 for Selection Chart.

Type E (two piece design) Type D (three piece design)—replace flexible elements withoutdisassembly of power train

9

N-EUPEX Type M Flexible Couplings—Fail-safe Design� Type M to connect a shaft using a bolt-on flange (with special hub)See page 5 for Selection Chart.

Type M (two piece design)

Part 10 Part 9

M 125 3.4 2,124 4,800 6.22 12.374 0.394 1.2 Per Customer 4.921 1.813 3.2 0.079 0.157 1.5 21M 140 5.1 3,186 4,800 7.09 12.374 0.512 1.3 Specification 5.512 2.000 3.2 0.079 0.157 1.4 25M 160 7.9 4,957 3,000 7.87 13.874 0.512 1.5 When Ordered 6.299 2.250 3.3 0.079 0.236 1.2 32M 180 12 7,789 2,800 8.66 18.374 0.512 1.7

Either Straight7.087 2.687 3.7 0.079 0.236 2.4 55

M 200 19 11,860 2,800 9.76 18.374 0.630 1.9Or Tapered Holes

7.874 2.875 4.3 0.079 0.236 2.2 71M 225 28 17,702 2,800 10.8 18.374 0.630 2.0 8.858 3.250 6.5 0.079 0.236 3.1 84M 250 39 24,783 2,650 12.4 18.374 0.787 2.4

May Be Specified9.843 3.375 6.3 0.118 0.315 2.7 101

M 280 55 34,519 2,300 13.5 22.500 0.787 2.6 SeeTypes 11.024 3.750 6.6 0.118 0.315 2.4 132M 315 78 48,681 2,000 15.0 22.500 0.866 2.8 D & E For 12.402 4.500 6.9 0.118 0.315 1.8 172M 350 109 68,153 2,000 16.9 22.500 0.984 2.9 Smaller Flanges 13.780 Only available with a type D hub (See page 6)

Max. Speed Higher speeds limitations are available upon requestd3 Exact OD is to be specified within these limits, when the order is placed

l1 & w2 Hub may be made shorter upon requestWeight Based on a hub with a medium size bore

d3 c u2 k s da D1 l1 S1 w2

Flange dimensions (Part 10) Pin Hub Dimensions (Part 9)Width Bolt Lngth Between

HP/ Nominal Max OD Available at Hole Hole # of Cplg Bore Thru the Hubs Wt100 Torque Speed From To OD Wdth Cntr Size Bolt OD Pilot Max Bore min max Total

TypeSize RPM (lbs.-in.) (RPM) (in.) (in.) (in.) (in.) (in.) (in.) Holes (in.) (in.) (in.) (in.) (in.) (in.) (in.) (lbs.)

So

lid

Table 9.1

10

143T0.875

1⁄266

3.60 3⁄466

3.20 166

3.60 166

3.60 11⁄266

4.80 11⁄266

4.80145T 3⁄4 2.40 1 2.40 11⁄2 2.40 11⁄2 2.40 2–3 2.40 2 3.60182T

1.1251

763.60 11⁄2

763.20 3

762.40 3

762.40 5

762.88 3

764.80

184T 11⁄2 2.40 2 2.40 5 1.44 5 1.44 71⁄2 1.92 5 2.88213T

1.3752

883.60 3

883.20 71⁄2

881.92 71⁄2

881.92 10

882.88 71⁄2

883.84

215T 3 2.40 5 1.92 10 1.44 10 1.44 15 1.92 10 2.88254T

1.6255

1032.52 71⁄2

1032.24 15

1031.68 15

1031.68 20

1032.52 15

1033.36

256T 71⁄2 1.68 10 1.68 20 1.26 20 1.26 25 2.01 20 2.52284T

1.87510

1181.98 15

1181.76 25

1181.58 25

1181.58 30

1182.64 25

1183.16

286T 15 1.32 20 1.32 30 1.32 30 1.32 40 1.98 30 2.64324T

2.12520

1351.48 25

1351.58 40

1351.48 40

1351.48 50

1352.37 40

1352.97

326T 25 1.18 30 1.32 50 1.18 50 1.18 60 1.98 50 2.37364T

2.37530

1722.37 40

1722.37 60

1722.37 60

1722.37 75

1723.79 60

1724.74

365T 40 1.77 50 1.89 75 1.89 75 1.89 100 2.84 75 3.79404T

2.87550

1942.16 60

1942.40 100

1942.16 — — — 125

1943.45 —- — —

405T 60 1.80 75 1.92 125 1.72 100 194 2.16 150 2.88 100 194 4.32444T

3.37575

2453.36 100

2453.36 150

2453.36 125

2454.03 200 Over 125 Over

445T 100 2.52 125 2.68 200 2.52 150 3.36 250 Max. Speed 150 Max. Speed

N-EUPEX Types BDS and ADS Flexible Couplings—Non Fail-safe DesignSummary of Basic Types

Table 10.1

284TS1.625

10 103 1.26 15 103 1.12 25 103 1.00 25 103 1.00 30103

1.68 25103

2.01286TS 15 118 1.32 20 118 1.32 30 118 1.32 30 118 1.32 40 1.26 30 1.68324TS 20

1351.48 25

1351.58 40

1351.48 40

1351.48 50 1.58 40 1.98

326TS 25 1.18 30 1.32 50 1.18 50 1.18 60 118 1.32 50 1.58364TS

1.87530

1521.53 40

1521.53 60

1521.53 60

1521.53 75 1.05 60

1181.32

365TS 40 1.15 50 1.22 75 1.22 75 1.22 100 135 1.18 75 1.05404TS

2.12550

1721.42 60 152 1.02 100

1721.42 — — — 125

1521.46 — — —

405TS 60 1.18 75 172 1.26 125 1.13 100 172 1.42 150 1.22 100 135 1.18444TS

2.37575

1941.44 100

1941.44 150

1941.44 125 172 1.13 200

1721.42 125

1722.27

445TS 100 1.08 125 1.15 200 1.08 150 194 1.44 250 1.13 150 1.89

*NOTE: Service Factors are calculated by using the HP rating.Selections are made with consideration given to both the maximum bore diameter and coupling HP rating

NEMAFrameSize

ShaftDia.(in.)

HP

N-E

UP

EX

-DS

Ser

vice

Fact

or*Motor

900 RPM

Drip P. & Enclosed

HP

N-E

UP

EX

-DS

Ser

vice

Fact

or*

1200 RPM

Drip P. & Enclosed

HP

N-E

UP

EX

-DS

Ser

vice

Fact

or*

1800 RPM

Drip Proof Enclosed

HP

N-E

UP

EX

-DS

Ser

vice

Fact

or*

HP

N-E

UP

EX

-DS

Ser

vice

Fact

or*

3600 RPM

Drip Proof Enclosed

HP

N-E

UP

EX

-DS

Ser

vice

Fact

or*

NEMA Motor Reference & N-EUPEX-DS Selection Chart

N-EUPEX ADS, BDS and HDS couplings provide the same characteristics,features, benefits and serviceability as the standard N-EUPEX couplings.However, their unique design gives them an additional dimension. Recessesare equally distributed around the circumference of the flexible element hub(part 1). The flexible elements slip into these recesses.

If the application fails, the pin hub (parts 4 and parts 2/3) continue to rotateand the flexible elements are forced out of their recesses. Since there is nometal to metal contact, no sparks are created.

This coupling requires no special tools for installation or alignment.

CAUTION: The N-EUPEX-DS design is not intended to be used as a torque

limiting device.

11

Sizes 66 to 305

Part 1Part 4

Part 1 Part 3

Part 2

Sizes 118 to 380 Sizes 430 to 556

N-EUPEX Types BDS and ADS Flexible Couplings—Non Fail-safe Design� N-EUPEX-DS is a non-sparking coupling (meets API610)—upon failure of flexible elements, the coupling

parts rotate independently of each other (there is no metal-to-metal contact)See page 10 for Selection Chart.

Type BDS (two piece design); Type ADS (three piece design)—replace flexible elements without disassemblyof power train; Type HDS with spacer (intermediate sleeve)

BDS 66 0.2 168 5,000 0.750 2.30 0.8 2.60 0.938 1.57 0.3 0.8 0.1 0.2 0.5 0.7 1.2BDS 76 0.4 301 5,000 0.938 2.70 0.8 2.99 1.125 1.97 0.3 0.8 0.1 0.2 0.7 0.9 1.7BDS 88 0.8 531 5,000 1.188 3.10 1.2 3.46 1.500 2.68 0.4 1.2 0.1 0.2 2.2 2.0 4.2BDS 103 1.4 885 5,000 1.625 2.99 1.2 4.06 1.625 2.99 0.5 1.4 0.1 0.2 3.5 3.3 6.8BDS 118 2.2 1,416 5,000 1.813 3.39 1.3 4.65 1.875 3.39 0.6 1.6 0.1 0.2 4.2 4.6 9BDS 135 3.3 2,124 5,000 2.125 3.94 1.4 5.31 2.125 3.94 0.7 2.0 0.1 0.2 7 8 15BDS 152 5.1 3,186 4,900 2.250 4.25 1.4 5.98 2.250 3.94 0.8 2.2 0.1 0.2 9 10 19BDS 172 7.9 4,957 4,250 2.375 4.65 1.6 6.77 2.375 4.25 0.8 2.4 0.1 0.2 13 13 25BDS 194 12 7,789 3,800 2.875 5.31 1.7 7.64 2.875 4.92 0.8 2.8 0.1 0.2 19 18 37BDS 218 18 11,860 3,400 3.250 5.91 1.9 8.58 3.250 5.51 0.9 3.1 0.1 0.2 26 27 53BDS 245 28 17,702 3,000 3.375 5.91 2.0 9.65 3.375 5.91 0.7 3.5 0.1 0.2 32 32 64BDS 272 38 24,783 2,750 1.73 3.750 6.50 2.4 10.71 1.73 3.750 6.50 0.7 3.9 0.1 0.3 44 42 86BDS 305 55 34,519 2,450 1.85 4.125 7.09 2.6 12.01 2.05 4.125 7.09 0.8 4.3 0.1 0.3 60 54 113

ADS 118 2.2 1,416 5,000 1.813 3.39 1.3 4.65 1.438 2.44 0.8 1.6 1.3 0.1 0.2 4 4 8ADS 135 3.3 2,124 5,000 2.125 3.94 1.4 5.31 1.750 2.95 0.9 2.0 1.5 0.1 0.2 7 7 14ADS 152 5.1 3,186 4,900 2.250 4.25 1.4 5.98 1.875 3.23 1.1 2.2 1.7 0.1 0.2 9 10 19ADS 172 7.9 4,957 4,250 2.375 4.65 1.6 6.77 2.250 3.74 1.1 2.4 1.9 0.1 0.2 13 13 26ADS 194 12 7,789 3,800 2.875 5.31 1.7 7.64 2.375 4.25 1.2 2.8 2.0 0.1 0.2 19 19 38ADS 218 18 11,860 3,400 3.250 5.91 1.9 8.58 2.875 4.80 1.3 3.1 2.1 0.1 0.2 26 26 53ADS 245 28 17,702 3,000 3.375 5.91 2.0 9.65 3.250 5.43 1.5 3.5 2.4 0.1 0.2 32 39 71ADS 272 38 24,783 2,750 1.73 3.750 6.50 2.4 10.71 1.18 3.625 6.10 1.7 3.9 2.7 0.1 0.3 44 54 99ADS 305 55 34,519 2,450 1.85 4.125 7.09 2.6 12.01 2.05 4.000 6.77 1.7 4.3 2.9 0.1 0.3 60 64 124

1.851.73 3.750 6.50 87 170

ADS 340 77 48,681 2,150 4.625 7.87 2.8 13.393.46 4.625 7.87

1.9 4.9 3.1 0.1 0.3 8489 173

2.322.32 4.000 7.09 118 237

ADS 380 108 68,153 1,950 5.500 9.06 2.9 14.963.46 5.500 9.06

2.0 5.5 3.3 0.1 0.3 119127 246

2.522.52 4.500 7.87

168152 320

ADS 430 147 91,165 1,700 5.875 9.84 3.1 16.933.86 5.875 9.84

2.2 6.3 3.5 0.1 0.3163 331

3.073.07 4.750 8.46 201 410

ADS 472 187 119,489 1,550 6.125 10.43 3.4 18.584.65 6.125 10.43

2.5 7.1 3.9 0.2 0.4 209214 423

3.463.46 5.375 9.45 254 516

ADS 514 228 146,927 1,400 7.000 11.81 3.5 20.245.28 7.000 11.81

2.6 7.5 4.1 0.2 0.4 262269 531

3.863.86 5.500 9.84 304 655

ADS 556 295 187,641 1,300 7.500 12.40 4.0 21.895.43 7.500 12.40

2.7 8.3 4.5 0.2 0.4 351335 686

D1 d2 u1 da D1 d2 w1 l1 P S1 WeightFlexible Hub (Part 1) Pin Hub (Parts 4 or 2 & 3) Lngth Reqd Distance (with medium size bore)

HP/ Nominal Max Bore Hub Width Cplg Bore Hub Width Thru Bolt Betwn Hubs Part100 Torque Speed Pilot Max OD @OD OD Pilot Max OD @ OD Bore Clear min. max. 1 4/2&3 Total

TypeSize RPM (lbs.-in.) (RPM) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (in.) (lbs.) (lbs.) (lbs.)

So

lidS

olid

So

lidS

olid

Do

es N

ot

Ap

ply

Table 11.1

12

Kw

Smin

Smax

D

Smin

Smax

KaD

Axial misalignmentFigure 12.3

Angular misalignment

Kr

D

Figure 12.1 Figure 12.2Radial misalignment

N-EUPEX Flexible CouplingsShaft to Hub Fits

Table 12.1

Shaft to Hub Fits Bore & Keyway Tolerances per AGMA 9002-A86

Clearance InterferenceFit Fit

Nominal KeywayShaft

Bore Bore Fraction Decimal

Tolerance Tolerance Tolerance

0 0 –0.0005

–0.0005 +0.001 –0.00101⁄2 0.500 0.500 1⁄8 × 1⁄16 0.1250 × 0.06255⁄8 0.625 0.625 3⁄16 × 3⁄32 0.1875 × 0.09383⁄4 0.750 0.750 3⁄16 × 3⁄32 0.1875 × 0.09387⁄8 0.875 0.875 3⁄16 × 3⁄32 0.1875 × 0.09381 1.000 1.000 1⁄4 × 1⁄8 0.2500 × 0.1250

11⁄8 1.125 1.125 1⁄4 × 1⁄8 0.2500 × 0.125011⁄4 1.250 1.250 1⁄4 × 1⁄8 0.2500 × 0.125013⁄8 1.375 1.375 5⁄16 × 5⁄32 0.3125 × 0.156311⁄2 1.500 1.500 3⁄8 × 3⁄16 0.3750 × 0.1875

Tolerance Tolerance

0 –0.0010

–0.0010 –0.0020

15⁄8 1.625 1.625 3⁄8 × 3⁄16 0.3750 × 0.187513⁄4 1.750 1.750 3⁄8 × 3⁄16 0.3750 × 0.187517⁄8 1.875 1.875 1⁄2 × 1⁄4 0.5000 × 0.2500

Tolerance

0

+0.0015

2 2.000 2.000 1⁄2 × 1⁄4 0.5000 × 0.250021⁄8 2.125 2.125 1⁄2 × 1⁄4 0.5000 × 0.250021⁄4 2.250 2.250 1⁄2 × 1⁄4 0.5000 × 0.250023⁄8 2.375 2.375 5⁄8 × 5⁄16 0.6250 × 0.312521⁄2 2.500 2.500 5⁄8 × 5⁄16 0.6250 × 0.312525⁄8 2.625 2.625 5⁄8 × 5⁄16 0.6250 × 0.312523⁄4 2.750 2.750 5⁄8 × 5⁄16 0.6250 × 0.312527⁄8 2.875 2.875 3⁄4 × 3⁄8 0.7500 × 0.3750

Clearance InterferenceFit Fit

Nominal KeywayShaft

Bore Bore Fraction Decimal

Tolerance Tolerance Tolerance

0 0 –0.0015

–0.0010 +0.0015 –0.0030

3 3.000 3.000 3⁄4 × 3⁄8 0.7500 × 0.375031⁄8 3.125 3.125 3⁄4 × 3⁄8 0.7500 × 0.375031⁄4 3.250 3.250 3⁄4 × 3⁄8 0.7500 × 0.375033⁄8 3.375 3.375 7⁄8 × 7⁄16 0.8750 × 0.437531⁄2 3.500 3.500 7⁄8 × 7⁄16 0.8750 × 0.437535⁄8 3.625 3.625 7⁄8 × 7⁄16 0.8750 × 0.437533⁄4 3.750 3.750 7⁄8 × 7⁄16 0.8750 × 0.437537⁄8 3.875 3.875 1 × 1⁄2 1.0000 × 0.5000

Tolerance

–0.0020

–0.0035

4 4.000 4.000 1 × 1⁄2 1.0000 × 0.500041⁄4 4.250 4.250 1 × 1⁄2 1.0000 × 0.500041⁄2 4.500 4.500 1 × 1⁄2 1.0000 × 0.500043⁄4 4.750 4.750 11⁄4 × 5⁄8 1.2500 × 0.6250

Tolerance

–0.0025

–0.0040

5 5.000 5.000 11⁄4 × 5⁄8 1.2500 × 0.625051⁄4 5.250 5.250 11⁄4 × 5⁄8 1.2500 × 0.625051⁄2 5.500 5.500 11⁄4 × 5⁄8 1.2500 × 0.625053⁄4 5.750 5.750 11⁄2 × 3⁄4 1.5000 × 0.75006 6.000 6.000 11⁄2 × 3⁄4 1.5000 × 0.7500

61⁄4 6.250 6.250 11⁄2 × 3⁄4 1.5000 × 0.750061⁄2 6.500 6.500 11⁄2 × 3⁄4 1.5000 × 0.750063⁄4 6.750 13⁄4 × 3⁄4 1.7500 × 0.7500

Tolerance

–0.0030

–0.0050

7 7.000 13⁄4 × 3⁄4 1.7500 × 0.7500

Note: For shaft sizes 1⁄2" through 61⁄2", square keyways are preferred.For shaft sizes over 61⁄2", rectangular keyways are preferred.

13

N-EUPEX Flexible CouplingsCommon Practices

N-EUPEX Couplings:� Made of GG-25 (high quality) cast iron � A load up to three times the coupling’s nominal torque

rating is allowable for a short period of time (i.e. duringstart-up, motor short circuit, etc.)

� Ambient temperature range is between –22°F and176°F.

Flexible Coupling Elements:� Standard N-EUPEX couplings have synthetic rubber

(Perbunan, Shore 80) flexible elements. � Applications involving reversing operations, very fast

acceleration rates or very high shock loads (i.e.reciprocating pumps, reciprocating compressors, etc.)can be supplied with oversize flexible elements (up toand including size 200) to minimize torsional play.

Arrangement of the Coupling Parts:Normally, the flexible element hub (part 1) is mounted on themotor shaft and the pin hub (part 2 or 4) is mounted on thedriven shaft. However, this theory should be reversed when:� The flexible element hub is above the pin hub on a

vertical application� The driven shaft is abnormally short and prevents the

pin ring (part 3) from being fully withdrawn to allowproper replacement of the flexible elements, etc.

Bores:Based on table 12.1, AGMA “shaft tolerances and bore fits”,the following will be assumed unless otherwise specificallystated:� Up to (and including) 4 inch bore will be provided with

a Clearance fit, (table 12.1) unless otherwise specified.� Over 4 inch bore will be provided with an Interference

fit, (table 12.1) unless otherwise specified.� Maximum bore diameters are based on using square

keystock.

Securing the Coupling:N-EUPEX couplings are provided with parallel keyways ac-cording to the appropriate specification as follows:� Shaft to Hub Fits (per table 12.1) will apply.� One taped hole (with set screw included) will be locat-

ed over the keyway, with the following exceptions:Size 58 (part 1) ≥ 0.590 and (part 4) ≥ 0.708; Size 68 (part 1) and (part 4) ≥ 0.787; Size 80 ≥ 0.984; Size 95 ≥ 1.496; Size 110 ≥ (part 2) ≥ 1.181; Size 125 (part 9) ≥ 0.787; and Size 140 ≥ 0.984 where thetapped hole will be located away from the keyway.

Flange-mounted Pulleys or Flywheels:Check the allowable circumferential speeds of the flange-mounted pulley or flywheel on an N-EUPEX type D or E.� Pulleys, etc. supplied by Flender are usually mounted

on an N-EUPEX flexible element flange (part 10).

Supporting the Shaft Ends:� The shaft ends, connected by the coupling, must be

supported directly in front of and behind the coupling.

Assembly and Disassembly From Shafts:� N-EUPEX type A, D, P, and H couplings allow shafts and

machines to be assembled and dismantled withoutdisassembly of the power train.

� N-EUPEX type A, ADS, D and P couplings require closeattention to dimension P in tables 6.1, 8.1 and 11.1. Thisis the amount of space required to remove the boltsduring assembly/disassembly of parts 2 and 3.

Balancing:� N-EUPEX coupling hubs are balanced to AGMA class 8

in one plane, not taking the keyway into account. Uponorder, couplings can be balanced to AGMA class 9 intwo planes, if quieter operation is desired.

� Spacer coupling (Type H) parts 5 and 7 are balanced toAGMA class 9 in one plane; part 6 is balanced to AGMAclass 9 in two planes. (Note: Balancing to AGMA class 9is only possible on coupling parts with finished bores,stated operating speeds and specified with or withoutthe keyway cut.)

� It must also be expressly stated if balancing is required

with a full parallel key.

Misalignment:Misalignment may result from improper alignment duringassembly and/or forces generated by the drive train (i.e. heatexpansion, bent shafts, soft machine frame, etc.)

Axial Misalignment:Axial misalignment DKa (figure 12.1) is allowable within therange between the maximum and minimum S1 / S2 dimen-sion, (see tables 6.1 to 11.1).

Angular Misalignment:Angular misalignment DKw (figure 12.2) is allowable withinthe Maximum Misalignment for the size, (table 14.1).

Radial Misalignment:Radial misalignment DKr (figure 12.3) is allowable within theMaximum Misalignment for the size, (table 14.1).

Caution!

Both angular and radial misalignment may occur at the

same time. But, the total of both misalignments may not

exceed the maximum allowable value of either the angular

or radial misalignment.

Vibration Calculations:Torsional vibration calculations can be supplied by Flenderupon request.

Installing and Putting Into Service:Refer to the installation instructions on page 14.

Questions:Contact Flender with any question regarding N-EUPEXcouplings.

14

N-EUPEX Flexible CouplingsInstallation

Installation:

Remove all N-EUPEX components from their packaging.Loosely assemble the coupling on a convenient surface.Check to confirm that all mating surfaces and parts are com-patible (i.e. bores are correct and on the proper hub; there isproper clearance for the assembly; the keystock matches thekeyways; all the coupling parts, flexible elements, etc. are athand; the proper assembly tools are available, etc.)

Step 1:

Inspect all the couplingcomponents and re-move any protectivecoatings or lubricantsfrom the bores, matingsurfaces, fasteners, etc.

Caution: Before cleaning the coupling parts with solvents,remove the flexible elements.

Step 2:

Remove any existing burrs, etc. from the shafts and/or mat-ing surfaces.

Step 3:

Use only recommended industry standards, keystock andtools to mount the coupling hubs onto the shafts. Caution:The shaft ends must not protrude beyond (through) the in-side of the coupling hub.

When installing an N-EUPEX style A hub, remember toinstall the pin ring (part 3) over the shaft first and insure thebolt-in hub (part 2) is oriented properly. Remove the flexibleelements before the part is heated.

If the coupling parts are heated, do not exceed 300°F.

Step 4:

Secure the hub axially using a setscrew or an end plate withshaft shoulder. When using a setscrew, it should be tight-ened with a hexagon socket head wrench (without using ex-tensions). When an end plate is used, consult with Flenderregarding the recess in the coupling parts.

Step 5:

After the hubs have been mounted and have cooled, replacethe flexible elements. NOTE: Make sure the flexible elementsare all the same size and have the same markings.

Step 6:

Position the shafts with coupling hubs into the connectedposition. Check the S1 dimension. When using type A, ADS,D and P couplings, slide the pin ring (part 3) into positionand connect the two parts (using the screws provided) to theprescribed torque.

Step 7:

Align the shafts to keep radial and angular misalignment as smallas possible. This will increase the service life of the coupling.

Step 8:

Check radial alignment by placing a ruler across the top ofthe two coupling halves. Perform the appropriate adjust-ments to make the ruler level and in full contact with bothcoupling halves.

Once aligned, check the amount of radial alignment off-set. The amount of offset must not exceed the figure givenin the maximum misalignment chart (table 14.1).

Step 9:

Check the angular alignment with a feeler gauge or dialgauge. Measure the S1 dimension at various intervalsaround the periphery of the coupling. Determine the maxi-mum and minimum dimensions without rotating the cou-pling. The difference between the maximum and theminimum must not exceed the figure given under in themaximum misalignment chart (table 14.1). Make the appro-priate adjustments as these measurements are made.

Step 10:

Add the amount of radial misalignment (Step 8) and angularmisalignment (Step 9) of your coupling. The total must notexceed the allowable maximum misalignment (table 14.1).

Step 11:

Before start-up, check the coupling for proper fit, (i.e. theflexible elements are fully installed and flush with the hubface, the set screws tightened to the proper torque, the align-ment and S1 dimension, etc.) making corrections if neces-sary. Finally, assemble the coupling guard to preventaccidental contact with the coupling.

CAUTION: If irregularities are detected during operation, the

drive assembly should be shut off immediately. The cause

of the problem should be determined by using the Trouble-

shooting Table (section 9) of the Operating Instructions. If

the cause can not be determined and there is no repair

facility nearby, call Flender’s service group for the help of a

service technician.

Maximum Misalignment (inches)

RPM RPMSize 900 1200 1800 3500 Size 900 1200 1800 350058 0.005 0.005 280 0.019 0.014 0.00968 0.007 0.004 315 0.016 0.010 0.00880 0.008 0.004 350 0.018 0.012 0.00995 0.009 0.005 400 0.020 0.013110 0.011 0.009 0.005 440 0.015125 0.012 0.008 0.004 480 0.016 0.013140 0.014 0.009 0.004 520 0.018 0.014160 0.016 0.013 0.008 0.004 560 0.019 0.015180 0.018 0.015 0.009 0.005 610 0.021200 0.017 0.013 0.006 660 0.018225 0.019 0.015 0.007 710 0.019250 0.017 0.013 0.008

Table 14.1

15

N-EUPEX Flexible CouplingsMaintenance

Preventative Maintenance:

Once the N-EUPEX coupling has been installed and put intooperation, a regular inspection interval and schedule shouldbe established to check the flexible elements for wear. Thisschedule should be incorporated into your routine inspec-tion schedule to insure the consistency of the inspectionprocess. However, the time period between inspectionsshould not exceed 1 year.

Flexible Element Wear:

The load of the application may create an indentation intothe flexible element we refer to as “torsional set”. Addition-ally, the amount of torsional set will vary, depending on thesize of the coupling. (On a size 58 coupling, the amount oftorsional set could be up to 1⁄4 of an inch deep. The larger thecoupling, the larger the torsional set will be.)

The torsional set does not affect the performance of thecoupling. It is simply the material reacting to the stress ofthe load. However, a very large torsional set may suggest asizing problem and warrant additional analysis of the appli-cation.

Normal wear of the flexible ele-ments will begin to eat away the ma-terial of the flexible element. This willresult in a visible reduction of the flex-ible element. When half of the flexibleelement’s compressed side (ref. thered line shown in figure 15.1) hasbeen worn away, the elements shouldbe replaced.

Flexible Element Replacement:

If a small amount of circumferential backlash is acceptablefor the application, the flexible elements do not need to bereplaced until they are worn as described above.

In critical applications, the flexible elements should bereplaced at regular intervals. The frequency of replacementintervals will depend on the severity of the application andenvironmental conditions. The service life of the flexibleelements can vary depending on many conditions (i.e.ultraviolet light, chemicals, extreme temperature, abra-sives, etc.). If the coupling is properly sized and the flexibleelements stored and operated under normal conditions, itwill provide many years of optimal performance.

Caution! The flexible elements should only be changed

in sets. Individual flexible elements with the same color cod-

ing should be used within each set.

Storage Conditions:

As with any elastomer or rubber material, N-EUPEX flexibleelements are subject to the effects of aging. They should bestored in a dry, dust-free area. They should not be stored to-gether with chemicals, solvents, fuels, acids, etc. Further-more, they should be protected against light, especiallydirect sunlight and strong artificial light with a high ultra-violet content (i.e. fluorescent, mercury-vapor, etc.). Addi-tional factors that may impact the life or performance of theflexible elements are exposure to oxygen, ozone, extremetemperatures, moisture, etc. To maximize the service life, werecommended that the inventory should continuously be ro-tated, with the oldest always being the first to be used.

With proper storage and application, N-EUPEX couplingswill provide many years of service and protection for yourmachinery.

Limitations:

Although the Flender N-EUPEX coupling is designed formost general purpose coupling applications, there are cer-tain limitations that should be considered:

Temperatures: Over +176°F, and/or below –22°F. A combina-tion of high temperature and high humidity will reduce thelife and performance of the coupling.

Chemical Environment: Life of the flexible elements aregreatly impacted by different chemicals in various ways. Achart of chemical compatibility can be supplied upon request.

For further details, contact the appropriate Flender

office.

Figure 15.1

K 4

20 E

N 2

002-

11-U

SA

CORPORATIONUSA950 Tollgate RoadElgin, IL 60123-9397Phone: 847-931-1990

Website: www.flenderusa.comToll Free 800-867-3766

E-mail: fast.track@flenderusa.com

POWER TRANSMISSION Inc.CANADA215 Shields Court, Units 4-6Markham, Ontario L3R 8V2

Website: www.flenderpti.comToll Free 877-896-2223

E-mail: flender@interlog.com

For additional non-standard designs, consult with Flender.*Amount of permissible misalignment

1 = relatively small 2 = modest3 = moderate 4 = largest

Coupling Description Permissible Misalignment Nominal Torque Max. Max.

Range (in.-lbs.) RPM Bore

Radial Angular Axial

BIPEX® Claw Type 1 2 4 120 – 32,750 5,000 4.330”

Pin TypeN-EUPEX® Fail-safe and 3 3 4 169 – 548,760 5,000 10.236”

Non Fail-safe

FlexibleRUPEX®

Pin & Bush2 3 4 1,770 – 11,506,300 5,000 25.196”

HighlyELPEX®

Flexible4 4 4 14,100 – 796,590 6,800 12.600”

HighlyELPEX-B®

Flexible4 4 4 213 – 128,339 4,500 7.480”

Highly Flexible forELPEX-S® Non-Uniform 4 4 4 2,930 – 557,500 4,200 10.236”

Loads

InternationalZAPEX-ZI® Grease 3 3 4 7,500 – 1,106,375 8,500 10.866”

Lubricated

Heavy DutyZAPEX-ZW® Oil 3 3 4 11,500 – 63,727,200 9,400 35.826”

Lubricated

StandardARPEX® ARS Series 3 3 3 1,500 – 938,000 13,400 11.023”

No Backlash

ARPEX® ARP Pumps– NAN API 610 3 3 3 1,680 – 106,200 21,700 5.905”– MECEM and 671 1,860 – 150,500 19,900 9.055”

HighARPEX® ARC Torque 3 3 3 495,000 –12,800,000 5,000 19.291”

Series

FLUDEX® 3.937”Fluid

3 3 4 95 – 136,000 3,550w/ N-EUPEX

Coupling7.480”

Couplings – Proven Performance Since 1899

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