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Bulletin B-472

PARA-FLEX COUPLINGGreater Finished Bore (PXGFB)Installation

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PARA-FLEX COUPLINGGreater Finished Bore (PXGFB)Installation

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Table of Contents

2. Installation of Flanges2. Installation of Flanges

4. Element Removal4. Element Removal

5. Removal of Flanges5. Removal of Flanges

3. Element Installation3. Element Installation

1. Parts & Tools1. Parts & Tools

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Parts & Tools

Required Parts:

PXGFB Flange Assemblies (Qty. 2)

Para-Flex Tire Element (Qty. 1)

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Parts & Tools (Continued)

Installation Tools:

Torque wrench for:

Hex heads

Cap screws

Removal Tools:

Allen wrench

Socket head wrench

Installation Tools

Removal Tools

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Installation of Flanges

Prior to installation:

1. Inspect shaft tolerances.

2. Remove burs and oil witha cloth or emery paper.

3. Inspect coupling to ensurethat no damage occurred

during shipping.

Removing shaft burs with emery paper

Removing shaft oils with cloth

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Installation of Flanges (Continued)

Install key into shaft keyway

Slide PXGFB Flange over key

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Installation of Flanges (Continued)

Install both PXGFBflanges nearest to the

intended mountingposition on the shaft.

Spacing between bothPXGFB flanges shouldbe set to the dimensionlisted in the instructionmanual.

Note: Spacingtemplate is includedwith each element tofacilitate thismeasurement.

Spacing template provides recommendedflange positioning

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Installation of Flanges (Continued)

Once proper spacingbetween PXGFB flanges hasbeen achieved, use a torque

wrench to tighten bothsetscrews on each hub

Setscrews should betightened to the torquerecommended in the Para-Flex instruction manual.

Note: One setscrew islocated over the keyway andthe other is offset at 65.

Using a torque wrench, tighten both setscrewson each hub to the recommended torque

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Element Installation

Loosen clamp ring nutsuntil the element easilyslides between the clamp

rings. Totally removing clamp

ring nuts from hub is notnecessary to achievesufficient spacing forelement.

Wrap element around the

flanges and seat it inbetween the clamp rings. If necessary, use a small

mallet to rap on the outerdiameter.

Loosen External Clamp Rings in orderto insert the Para-Flex element

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Element Installation (Continued)

Pull element tight to close thesplit.

While holding the elementssplit closed, tighten both clampring nuts by hand.

Tighten only to hand tight.

Over tightening could resultin improper installation.

IMPORTANT: Do not use aspanner wrench or hammer& drift to tighten the clampring nuts beyond hand tight.Doing so will result inincorrect installation

Hand tighten both clamp ring nutswhile holding the element gap closed

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Element Installation (Continued)

Using a torque wrench,alternately and evenly

tighten the clamp ring boltsto the torque valuesindicated in the instructionmanual.

Check each bolt until theproper torque is achievedwithout additional boltrotation.

Use torque wrench to alternately tightenthe 4 micro mount bolts on each hub

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Element Installation (Continued)

The lock washers should befully compressed between thehead of the bolt and the clamp

ring nut.

IMPORTANT: If the torque valueof a bolt is reached before thelock washer is fully compressed:

Loosen all 4 bolts and turnthe clamp ring nut 1/8 of aturn counter-clockwise.

Then re-torque the boltsusing the torque wrench.

Repeat as necessary untilthe lock washers are fullycompressed.

Correct = Lock washer is engaged

Incorrect = Lock washer is not engaged

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Element Removal

Loosen the clamp ring bolts untilnone of them come into contactwith the clamp ring.

Then loosen the clamp ring nutsuntil the element can beremoved.

Note: A spanner wrench orhammer and drift may be

necessary to initially releasethe clamp ring nut. Theremainder of the rotations maybe achieved by hand.

Using a wrench, loosen micromount bolts on each flange

Loosen the clamp ring nuts on each flange

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Element Removal (Continued)

Peel element apart at the split.

Note: It is good practice to clean clamp rings withsolvent and dry them before installing new element

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Removal of Flanges

Using an Allen wrench, loosenboth set screws on the flange

one over the key and theother at 65on the shaft

Slide the flange off of the shaft

Loosen both set screws on each flange

Slide PXGFB Flange Assembly off of shaft

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Section 3 - Grip-Tight Hub InstallationThe DODGE Grip-Tight adapter mounted Para-Flex coupling incorporates a unique way of mounting and dismounting a coupling to and from the shaft. The patentedfeature pushes the coupling hub onto the tapered adapter sleeve and locks it into place as the locknut is given a predetermined clockwise rotation. The locknut pushes

against the coupling hub face ensuring a positive uniform engagement of the coupling hub and adapter. Dismounting is accomplished by rotating the locknut in acounter-clockwise direction pulling the coupling from the adapter and releasing it from the shaft.

Figure 3: PXGT Assembly

(1) Place the locknut into the groove on the coupling hub, THEN insert the adapter sleeve into the coupling hub in the direction of the taper. Rotate the locknut

clockwise to engage the adapter sleeve.(2) Do not use lubricants on the shaft or any surfaces of the coupling assembly.(3) Slide the hub assembly into position onto the shaft. If the unit will not slip onto the shaft, turn locknut counter-clockwise to expand adapter sleeve.

(4) Wearing gloves, rotate locknut clockwise, by hand, as tight as possible until the adapter sleeve grips and does not spin on the shaft. If needed, tap on the

locknut outer diameter while turning locknut to assist with this step. At this point you should not be able to rotate the locknut by hand and you should not beable to move the hub assembly axially along the shaft by hand. If the hub assembly can be moved axially along the shaft then continue tightening the locknu

until assembly is unable to move axially by hand.(5)

(6) Lock hub assembly to shaft by rotating locknut, with a spanner wrench or brass drift and hammer, clockwise by amount shown in Table 5.(7) Tighten locknut setscrew until 3/32 Allen key bends (25 in-lbs).

Section 3a Dismounting GT Adapter Assembly

(1) Completely remove the setscrew in the adapter locknut.

(2) Rotate the locknut counter-clockwise with a spanner wrench or brass drift pin and hammer.(3) The locknut will alternate between spinning easily and becoming snug. When the locknut becomes snug strike, while rotating counter-clockwise

the backside of the flange with a soft mallet around the entire face as shown to reduce resistance.

(4) Repeat steps 2 and 3 until flange assembly becomes loose.

Table 5Series Locknut Rotation

50 2/3 Turn

60 1 Turn

80 1 Turn

Clamp Ring

Coupling Hub

Elastomeric Element

Hex-Head Micro-

Mount Screw

Tapered Adaptor Sleeve

Grip Tight Locknut

Locknut

Lockwasher

Scribe a line on the locknut above the adapter sleeve slot. This scribe line will be used in step 5 to verify proper locknut rotation.

Because of the possible Danger to persons or property from accidents which may result from the improper use of products, it is important that correct procedures be followed: Products must be used inaccordance with the engineering information specified in the catalog. Proper installation, maintenance and operational procedures must be observed. The instructions in the instruction manual must bfollowed. Inspections should be made as necessary to assure safe operation under prevailing conditions. Proper guards and other suitable safety devices or procedures as may be desirable or as may

installed, adjusted and maintained by qualified personnel who are familiar with the construction and operation of all equipment in the system and the potential hazards involved. When risk to persons or

property may be involved, a holding device must be an integral part of the driven equipment beyond the speed reducer and output shaft.

WARNING

Baldor Electric Company . This unit and its associated equipment must bebe specified in safety codes should be provided, and are neither provided by nor are the responsibility of Baldor Electric Company

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Section 4 Flexible Element Installation(1) If flanges are being re-used, clean flange mounting area as well as flexible element seats with a solvent, such as Xylene (Xylol), to remov

grease, oil, and dirt from surfaces. A diluted soapy water solution may be applied to aid with element installation.

(2) Loosen clamp ring nut so the element toe can seat within the clamp ring faces. Wrap flexible element around flanges as shown. Make sure the toof the element is fully worked down into the flange and seats on the hub. To ensure proper seating, rap around the tires outside diameter with a

small mallet until split is closed. Make sure element is evenly centered on the flanges.

(3) Hold split closed and tighten clamp ring nuts by hand. Using both hands, knead the tire pulling it toward the split and tighten clamp ring nut

further to hand-tight.

(4) Tighten hex-head micro-mount screws to the torque shown in Table 6.

NOTE: The bottom of the hex-head cap screws should compress the lockwasher beneath the head. If the lockwasher is not compressed then thelocknuts should be loosened 1/8 turn. To accomplish this, loosen hex-head cap screws and rotate locknut(s) 1/8 turn in the counterclockwise

direction. Repeat item 4 above.

Table 6

Micro-mount Screw

Size Size Torque

50 M6 x 18mm 130 in-lbs

60 1/4-20 x 7/8 140 in-lbs

80 5/16-18 x 1-1/8 290 in-lbs

Section 4a Flexible Element Replacement(1) Loosen hex-head micro mount screws.

(2) Loosen clamp ring nuts by rotating counter clockwise.

(3) Grasp one end of flexible element at the split and peel it off the flanges.(4) Clean clamping parts with a solvent, such as Xylene (Xylol), to remove grease, oil, wax and dirt from surfaces.

(5) Realign coupling and install new flexible element according to Section 4.

IM499389

www.baldor.com www.ptplace.com www.dodge-pt.com www.reliance.com

aldor Electric Company HeadquartersO. Box 2400, Fort Smith, AR 72902-2400 U.S.A., Ph: (1) 479.648.5792, Fax (1) 479.648.5792, International Fax (1) 479.648.5895

aldor - DODGE/Reliance040 Ponders Court, Greenville, SC 29615-4617 U.S.A., Ph: (1) 864.297.4800, FAX: (1) 864.281.2433/07 Copyright 2007 Baldor Electric Company All Rights Reserved. Printed in USA.

This material is not intended to provide operational instructions. Appropriate instruction manuals and p

should be studied prior to installation, operation or maintenance of equipment.

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INSTRUCTION MANUAL FOR

PARA-FLEX Spacer Couplings

INSTALLATION

1. Install hubs on shaft per instruction packaged with bushings(#499645). Shaft ends must not project beyond hub ends.

2. Place shafts into position. If shaft end float is to occur, locatethe shafts at the mid-position of the end float.* DimensionA, see drawing, should be the same as the figure stampedon the end of the flange after the coupling number.

3. Check shaft angular misalignment by measuring dimensionA at four places 90 apart. Adjust the equipment until thefour measurements do not vary more than value B per thetable. Check the parallel offset by laying a straight edgeacross the O.D. of shaft hubs in four places 90 apart. Thegap between the flange and straight edge should not exceed#fr1/32>. To realize maximum coupling life, align the couplingas accurately as possible at initial installation.

4. Check the torque on the clamp ring screws per the table.Tighten if necessary. Compress the center assembly (usingC clamps if necessary) and slip between the hubs untilpilots engage. Install hub screws and tighten with a torquewrench to the torque specified in the table for hub screws.

FLEXIBLE ELEMENT REPLACEMENT

1. Remove hub screws. Compress the center assembly (using

C clamps if necessary) and remove from place.2. Loosen all clamp ring screws. Grasp one end of flexible

element at the split and peel off of flanges.

3. Check to see that only 2 or 3 threads of each clamp ringscrew are engaged.

4. Holding the replacement flexible element upright with thesplit open and up, slip each flange into the element. Placethis assembly on one end and work the element down on theflange seats, using a small mallet if necessary, until the splitof the element is closed. Holding the split closed, tighten (byhalf turns) two screws in the top flange which are directly

opposite the split in the element. Using both hands, kneadthe tire pulling it toward the split. Hold split closedand tighten(by half turns) next two screws farthest from split. Repeat thisprocedure on all remaining clamp screws. Retighten (by halfturns) all clamp ring screws repeatedly, stopping when metal-to-metal contact is felt upon bottoming of the clamp ring tothe flange. With the clamp ring thus bottomed to the flangeand the rubber element thus compressed to its limitation,

retighten each screw with a torque wrench to the torquespecified in the table for clamp ring screws. Turn theassembly over and using the procedure specified above,tighten the screws in the remaining flange.

5. Replace center assembly per Step 4 of Installation.

Wrench Torque (Pound-Inches)

COUPLINGSIZE

Clamp RingScrews

HubScrews B

PS40 130 130 1/64PS50 130 180 1/64PS60 240 180 1/64PS70 290 180 1/64PS80 290 300 1/64PS90 480 300 1/32PS100 480 300 1/32PS110 480 300 1/32PS120 1080 720 1/32PS140 1080 720 1/32PS160 2160 1296 1/16PS200 2160 1296 1/16

If replacing clamp ring screws and washers use only SAEGrade 8 screws and hardened washers.

* If limited end float is required or sleeve bearings are usedconsult DODGE.

WARNING: Because of the possible danger to persons(s) or property from accidents which may result from the improper use of products, it is important thatcorrect procedures be followed. Products must be used in accordance with the engineering information specified in the catalog. Proper installation, maintenanceand operation procedures must be observed. The instructions in the instruction manuals must be followed. Inspections should be made as necessary to assuresafe operation under prevailing conditions. Proper guards and other suitable safety devices or procedures as may be desirable or as may be specified in safetycodes should be provided, and are neither provided by Baldor Electric Company nor are the responsibility of Baldor Electric Company. This unit and its associatedequipment must be installed, adjusted and maintained by qualified personnel who are familiar with the construction and operation of all equipment in the systemand the potential hazards involved. When risk to persons or property may be involved, a failsafe device must be an integral part of the driven equipment beyondthe speed reducer output shaft.

www.baldor.com www.ptplace.com www.dodge-pt.com www.reliance.com

aldor Electric Company Headquarters.O. Box 2400, Fort Smith, AR 72902-2400 U.S.A., Ph: (1) 479.648.5792, Fax (1) 479.648.5792, International Fax (1) 479.648.5895

ODGE/Reliance Division040 Ponders Court, Greenville, SC 29615-4617 U.S.A., Ph: (1) 864.297.4800, FAX: (1) 864.281.2433

M499991 04/07-3M-K Copyright 2007 Baldor Electric Company All Rights Reserved. Printed in USA.This material is not intended to provide operational instructions. Appropriate instructmanuals and precautions should be studied prior to installation, operation or mainten