AIR POWERED TOGGLE PRESS - 3D ContentCentral

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CORPORATION

AIR POWERED TOGGLE PRESS

S E T - U P L & L M A I N T E N A N C E l G U I D E

98PM

CONTENTS

Updated 12/97

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1

Page 6:


BTM Corporation � 300 Davis Road Marysville, Michigan U.S.A. 48040 � Phone 810-364-4567 � Fax 810-364-6178

Page 1: Contents

: 1.0 Safety1.0 How It Works1.1 Press Sizing1.2 Determining Work Stroke Required

Page 3: 1.3 Force Calculation1.4 Press Selction

Page 4: 1.5 BTM Toggle Press Force Chart1.6 Piercing Force Requirements1.7 Piercing Materials Other Than Mild Steel

Page 5: 2.0 Press Specifications2.1 Tolerances2.2 Press Volume & Air Consumption2.3 Air & Valving Requirements

2.4 Surge Tank Sizing3.0 Application of BTM Toggle Presses3.1 Press Set-Up3.2 Stop Blocks

Page 7: 3.3 Press Mounting3.4 Throat Depth3.5 Anti-Rotation & Guide3.6 Shut Height Adjustment3.7 Lifting With The Toggle Press

Page 8: 4.0 Equalizing Presses4.1 EU Models4.2 REU Models

Page 9: 4.3 Design & Set-Up5.0 Maintenance5.1 Lubrication5.2 Seal Replacement

Page 10: 5.3 Replacing Components

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2

B

Piston Surface

Air to Port B:Ram retracted

A

B

A

Air to Port A:Ram advances

B

A

As Ram reaches end ofstroke, toggle developshighest forces

1.0 How It Works:The BTM toggle press produces high forces using 80 psi air pressure. The toggle mechanism multiplies theforce of the air pressure acting on the piston surface. Force is generated on a curve; as the press ram advancesforce output increases, with maximum force produced at the end of the stroke. (Figure A.)

Work stroke 5.

Point of tool contact with work piece 4.

Material thickness 3.

Die entry 2.

End of Stroke 1.

1.1 Press Sizing:Accurate calculation of the required force and work stroke is necessary in order to perform the work withoutover-taxing the press. Calculating force for piercing and shearing is relatively straightforward. Calculationsfor operations such as coining, crimping, clinching and riveting can be more complex, requiring specialformulas and/or tryout. BTM's application engineering department offers assistance in press sizing. Call BTMat 810-364-4567 for information. Chart 1.5 shows calculated forces at incremental distances from the end ofthe stroke for each BTM press model. This chart is to be used with your force calculation and work strokerequirement to select the appropriate press model.

Safety:User's Responsibility: Each person who is to operate and maintain the unit must be familiar with all safetyprecautions before attempting to use or service the press equipment. The owner of the machine is responsibleto train and supervise all personnel as to safety precautions. The customer must provide proper gaurding toprotect personnel from moving machinery.

1.2 Determining Work StrokeRequired:Work Stroke is figured backwards fromthe fully extended end of the press stroke(piston on down stop). (Figure B.)1. End of Stroke2. Entry of the punch into the die beyond the work piece.3. Material Thickness4. Point of tool contact with work piece.5. Distance from point of tool contact with work piece to end of full stroke = work stroke.

Figure A.

Example:2. Material Thickness = .91 mm - .036"3. Punch Penetration + .76 mm - .030"4. Work Stroke = 1.68 mm-.066"

Figure B.


Piston

Down Stop


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1.5 BTM Toggle PressForce Chart: (On facing page)This chart lists forces exerted by the press ramat incremental distances from the end of the stroke.Note that the toggle mechanism develops a forcecurve (Figure C), with force increasing as the ramadvances. All forces are rated at 80 psi (5.5 bars)air pressure to the BTM press.

1.4 Press Selection:After determining the force required with safetyfactor, the work stroke must be considered inselecting the appropriate press model. Use chart1.5 to verify that the press you are consideringproduces the required force at the distance fromthe end of the stroke where your tooling willcontact the work piece. If it does not, a largerpress is required. In the example provided in 1.2& 1.3, a two ton BTM press would be an appro-priate choice to perform the piercing operation.

3

1.3 Force Calculation:The example below demonstrates press sizing based on piercing force requirements and is useful for otheroperations as well. Several factors must be considered, including the shear strength and thickness of thematerial to be pierced, length of cut of the pierced hole, and the amount of punch entry or work stroke. Shearstrength values for a variety of materials are provided in chart 1.7 for your convenience. BTM recommendsadding a 50% safety factor to the force requirement calculation to compensate for other variables such asfriction, die springs, dull cutting tools, lifting of dies (3.7) and operating pressure fluctuations.


4,000

3,000

2.5 1.5 1.0 0.5 0.02.0

Distance (inches)

Forc

e (l

bs)

1,000

2,000

5,000

0

Calculation

2 TON PRESS

Figure C.

A. Shear strength of material =B. Thickness of material =C. Length of cut (circumference) =

Multiply AxBxCx1.5 (Safety Factor) =Force Required

Example: Force required to pierce a .25" (6.4mmdiameter hole in .036" (.9mm) thick mild steel.

A. Shear strength (see chart 1.7) =50,000 psi (344.7Nmm2)B. Material Thickness =.036" (.9mm)C. Lencgth of cut (of .25" dia hole) =.78" (19.8mm)

Multiply (AxBxC) & add 50% safety factor (x1.5) =2106 lbs. (9215N)

Force required at the point where toolingcontacts the work piece. (.066" - 1.68mmin example 1.2)


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4

Distancefrom

Bottom ofStroke

.00".00mm

.01"0.25 mm

.02".05 mm

.03"0.75 mm

.06"1.5 mm

.12"3.0 mm

.24"6.1 mm

.50"12.7 mm

.75"19.0 mm

1.00"25.4 mm

1.25"31.75 mm

1.50"38.1 mm

1.75"44.45 mm

2.00"50.8 mm

2.25"57.15 mm

2.50"63.5 mm

3.00"76.2 mm

3.50"88.9 mm

4.00"101.6 mm

4.50"114.3 mm

8965

6321

5145

3609

2523

1755

1186

949

804

701

621

552

487

245031

172593

150509

98714

69188

48341

32914

26536

22728

20118

18178

16653

15406

14352

13438

11890

10565

9337

8103

122515

86297

70255

49357

34594

24171

16457

13268

11364

10059

9089

8326

7703

7176

6719

5945

5282

4669

4051

22526

15906

12960

9113

6392

4466

3041

2452

2100

1859

1679

1539

1423

1326

1242

1099

976

863

749

100,201

70,753

57,649

40,537

28,433

19,866

13,527

10,907

9,341

8,269

7,469

6,846

6,330

5,898

5,525

4,889

4,341

3,839

3,332

1 Ton 2 Ton 5 Ton 20 Ton10 Ton 40 Ton

Chart 1.5 Force at Stroke Distance

Chart 1.6 Force Required to Pierce Holes

.250"6.0mm

.454.0

.65.3

.827.3

1.008.9

1.210.7

1.4512.9

2.017.8

3.026.7

4.943.6

Shear Strength

Aluminum 1060-0

Nylon

Copper

Aluminum 2011-T3

Brass

Aluminum 2014-T6

Steel Mild Low Carbon

Steel Stainless 409

Steel Stainless 304 L

Steel Stainless 321

.14

.24

.52

.64

.72

.84

1.00

1.30

1.62

1.66

N/mm2

N/mm2

N/mm2

N/mm2

N/mm2

N/mm2

N/mm2

N/mm2

N/mm2

N/mm2

48.26

82.74

179.26

220.63

248.21

289.58

344.74

448.16

558.47

572.26

7,000

12,000

26,000

32,000

36,000

42,000

50,000

65,000

81,000

83,000

psi

psi

psi

psi

psi

psi

psi

psi

psi

psi

4483

3161

2572

1804

1261

878

593

474

402

351

310

276

244

19,941

14,061

11,441

8,025

5,609

3,906

2,638

2,108

1,788

1,561

1,379

1,228

1,085

39,878

28,117

22,886

16,054

11,223

7,807

5,276

4,221

3,576

3,118

2,762

2,455

2,166

200,406

141,507

115,298

81,069

56,870

39,736

27,054

21,810

18,683

16,534

14,942

13,687

12,664

11,797

11,045

9,773

8,683

7,673

6,659

45053

31812

25920

18225

12785

8933

6082

4903

4200

3717

3359

3077

2847

2652

2483

2197

1952

1725

1497

544,974

383,866

312,510

219,551

153,882

107,518

73,204

59,019

50,550

44,745

40,430

37,036

34,265

31,920

29,888

26,445

23,495

20,769

18,020

1,089,952

767,737

625,015

439,102

307,763

215,031

146,409

118,038

101,099

89,489

80,860

74,076

68,529

63,841

59,775

52,889

46,995

41,533

36,925

MultiplicationFactorMaterial

Chart 1.7 Material Strengths

1.6 Piercing ForceRequirements:This chart shows the force required to pierce roundholes (of various diameters) in mild steel (of variousthickness.) A 50% safety factor should be added tothese numbers when sizing your press.

1.7 Piercing Materials Other ThanMild Steel:Piercing force required for material other than mildsteel can be calculated using the rated shear strength(see chart 1.7) and the formula given at 1.3. Thechart 1.7 provides shear strength &multiplicationfactors for other common materials. Multiply thefactor for your material by the force shown in chart1.6.

Ex: Piercing a .500" (12mm) hole in .050" (1.2mm)mild steel requires 2 Tons. To pierce the same holein the same thickness of Aluminum 1060-0 multiply2 Tons x .14 (chart 1.7) = .28 Ton.


.500"12.0mm

.87.1

1.210.7

1.6514.7

2.017.8

2.3621.0

2.824.9

4.035.6

6.053.4

9.887.2

19.7175.3

.375"9.0mm

.76.20

.98.0

1.2511.1

1.513.3

1.816.0

2.017.8

3.026.7

4.540.0

7.465.8

.625"15.0mm

.958.5

1.513.3

2.118.7

2.4521.8

2.9526.2

3.531.1

5.044.5

7.566.7

12.3109.4

24.6218.8

.750"21.0mm

1.2511.1

1.816.0

2.4521.8

2.925.8

3.5431.5

4.237.4

6.053.4

9.181.0

14.7130.8

29.5262.4

.875"21.0mm

1.513.3

2.118.7

2.925.8

3.430.2

4.1336.7

4.943.6

7.062.3

10.593.4

17.2153.0

34.4306.0

1.000"25.0mm

1.6514.7

2.421.4

3.228.5

3.934.7

4.7242.0

5.548.9

8.071.2

12.2108.5

19.7175.3

39.4350.5

.125"3.0mm

.222.0

.32.7

.454.0

.524.6

.65.3

.76.2

1.08.9

.020"0.5 mm

.030"0.7 mm

.040"1.0 mm

.050"1.2 mm

.060"1.5 mm

.070"1.7 mm

.100"2.5 mm

.150"3.7 mm

.250"6.0mm

.500"12.0 mm

Hole Diameters

MetalThickness

Force In Tons & KiloNewtons Required For Piercing Round Holes In Mild Steel*

*WithoutSafety Factor

BTM Press Model

Force output in pounds and Newtons at 80 psi (5.5 bar)


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2.0 Press Specifications:BTM Toggle Press bodies are made from 6061-T6Aluminum (45,000 psi tensile strength) and arehard coat anodized to a Rockwell C70 surface hard-ness. Pistons, links, pins, and rams are steel. Pistonseals are molded V block style.

2.1 Tolerances:The following are tolerances that can be expectedfor the dimensions given in this catalog (unless speci-fied otherwise):

2 place decimal (.00)...........+/-.010" (+/-0.25mm)3 place decimal (.000)........ +/-.005" (+/-0.13mm)4 place decimal (.0000)...... +/-.0005" (+/-0.01mm)Ram rotation....................... +/-15'

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1 ton press with 1.5" (38 mm) strokevolume = 31.8 in3 (521.1 cm3) (See Chart)60 cycles / minuteat 80 psig (5.5 bar)

Formula:

Press volume x cycles / min1728

(14.7 + pressure)x CFM14.7

press volume x cycles / min

1+ pressurex press volume

14.7 + 80 31.8 x 60 cycles / min.14.7 1728

x

7.1

1 + 5.51

x 0.521 dm3 x 60 cycles / min

203

5

CFM =

SCFM =

Air Volume =

Consumption =

Example:

Solution:

SCFM =

SCFM =

Litres / Min =

Litres / Min =

1

BTM Press Model

2 Ton 40 Ton20 Ton10 Ton5 Ton1 Ton

.03"0.75 mm

.06"1.5 mm

.12"3.0 mm

.24"6.1 mm

.50"12.7 mm

.75"19.0 mm

1.00"25.4 mm

1.25"31.75 mm

1.50"38.1 mm

1.75"44.45 mm

2.00"50.8 mm

2.25"57.15 mm

2.50"63.5 mm

3.00"76.2 mm

3.50"88.9 mm

4.00"101.6 mm

4.50"114.3 mm

4.878.7

6.6108.2

9.2150.8

12.2199.9

18.4301.5

22.0360.5

25.8422.8

29.0475.2

31.8521.1

34.4563.7

37.6616.2

39.8652.2

9.6157.4

13.2216.4

18.4301.6

24.4399.8

36.8603.0

44.0721.0

51.6845.6

58.0950.4

63.61042.2

68.81127.4

75.21232.4

79.61304.4

18.8308.1

37.4612.9

56.2921.0

65.41071.7

84.21379.8

103.01687.9

121.61992.7

131.02146.7

149.62451.5

168.42759.6

177.62910.3

187.03064.4

196.43218.4

205.83372.5

215.23526.5

224.43677.3

261.84290.1

37.6616.2

74.81225.8

112.41842.0

130.82143.4

168.42759.6

206.03375.8

243.23985.4

262.04293.0

299.24903.0

336.85519.2

355.25820.6

374.06128.8

392.86436.8

411.66745.0

430.47053.0

488.87354.6

523.68580.2

310.05080.0

378.86207.4

447.87338.1

585.49593.0

723.211851.1

826.613545.5

929.815236.7

1033.216931.1

1067.617494.8

1102.018058.5

1171.019189.2

1205.419753.0

1239.820316.7

1274.220880.4

1355.222207.7

1412.023138.5

1549.825396.7

2.2.1 Calculating Air Consumption:To determine air consumption in cubic feet or litersper minute use the following formula. Metric versionsshown in green.

Note: BTM Presses may be ordered with strokelimiters to reduce air consumption. See catalogpage for your model.

2.3 Air & Valving Requirements:BTM Toggle Presses are operated by compressed air.The recommended maximum pressure is 80 psi (5.5bars). Air must be clean, dry and lubricated with alight spindle oil. Valving and piping should be greaterthan or equal to the press ports, or determined by theair requirements of the total number of presses whenmultiple presses are piped together. A FRL ( Filter,Regulator, Lubricator) must be used to condition theair.

2.2 Air ConsumptionBTM Press Volume Chart:

Amountof Stroke

in Use

620.010160.0

757.612414.8

895.614676.2

1170.819186.0

1446.423702.2

1653.227091.0

1859.630473.4

2066.433862.2

2135.23498.6

2204.036117.0

2342.038378.4

2410.839506.0

2479.640633.4

2548.441760.8

2710.444415.4

2824.046277.0

3099.650793.4


Volume is shown in cubic inches and cubic centimeters per full cycle.


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2.4 Surge Tank Sizing:A surge tank is recommended when operating a 20 or 40 ton press, when piping multiple presses together orwhen a press is used in an air starved environment. Air supply lines must be adequately sized. (See 2.3.) Use thefollowing formula to determine surge tank size:

x (14.7 + Operating Pressure)

14.7in cubic inches(See Chart 2.2)

Press volume

1

x (1 + Operating Pressure)1000 = Surge Tank volume in Litres

231 = Surge Tank volume in Gallons

20 Ton Press x 4.5" (114.3mm) StrokeVolume = 1549.8 in3 (25396.7c.c) See ChartOperating Pressure = 80 psi (5.5 bar)

Example:

1549.8 x (14.7 + 80)

25396.7 x (1+5.5)

Solution:

1

14.7

1000 = 163 Litre Surge Tank

231 = 43 Gallon Surge Tank

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3.2 Stop Blocks:When using stop blocks in a die, the press pistonmust be allowed to reach the internal stop. Stopblocks must be set-up so that the press completesthe work and contacts the stop blocks when thepiston meets the internal stop. The stop blocks areonly required to balance the force being applied tothe work piece. If installed incorrectly, the stopblocks and press mechanism will absorb the forcemeant to be applied to the work piece. (Figure D.)

6

÷

÷

÷

÷

Formula:

PressVolumein cubic

centimeters(See Chart 2.2)

Figure D.


Correct Incorrect

3.0 Application of BTM Toggle Presses:Sound engineering principles should be adhered towhen tooling and mounting BTM presses. Someguidelines follow.

3.1 Press Set-Up:To attain maximum life from an Air Toggle Press,the work must be performed as near the end ofthe stroke as possible. In all applications, the pressmust complete its stroke. In piercing or shearingapplications, the work will be performed above theend of the stroke and the tooling will continuethrough the work piece to complete the stroke. Inother operations such as coining, clinching andriveting, the tooling must be adjusted so that thepress reaches the end of the stroke as the work iscompleted. (Figure D.) No hesitation of the ram ispermissible during the work stroke.The recommended method of set-up is to adjustthe tooling back so that the press can be fullycycled without contacting the work piece. A seriesof gradual adjustments are then made using 80 psisupply pressure, until the press completes the work.If the press hesitates or stalls above the bottom ofthe stroke using this method, it is undersized for theoperation.

Stop block

Piston

Stop block

PistonDown Stop


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3.3 Press Mounting:The BTM Air Toggle Press produces high forceswhich must be contained by the press mounting toensure maximum life. When constructing forceframes for press mounting, rigidity is essential tominimize deflection of the press ram.

Head model (H) presses must be mounted so thatboth keyways are in direct shear and directly tiedto an integral rear support and frame. (Figure E.)

BTM Head "H" Presses

7

3.4 Throat Depth:Designs incorporating deep throats must havesufficient force frames to inhibit deflectionat the tooling. It is recommended that the toolingbe mounted in a separate block affixed to the frameto provide final alignment. (Figure G.)

3.5 Anti-Rotation & Guides:BTM Toggle Presses feature a ± 15' non-rotatingram. The method of mounting tooling to the ramcan affect the life and performance of the press andtooling. Alignment of the tooling and containmentof the deflection are imperative. In critical appli-

cations, usually where die clearance is less than.0005" (0.012mm) per side, it is recommendedthat an alignment guide be used. Sliding ways orposts and bushings are good techniques for thispurpose.

SeparateToolingBlock

Rear Support

Figure G.

3.6 Shut Height Adjustment:Various methods of shut height adjustment areprovided with standard BTM components. Ramswith built-in adjusting screws (PA&PTA), adjust-able die button support (PB models) and die setadapter groups (DSAG) are listed in catalog 98P.

3.7 Lifting With The Toggle Press:Force produced when retracting the toggle press isreverse of the force curve. However, certain longstroke presses will not perform in accordance withthe force curve near the retracted position. ConsultBTM when considering the lifting of large tools withthe retract stroke.

Keyway

Integral Rear Support

BTM Head Press

Mounting Screws

Figure E.

Equalize Movement

StationaryMounting Block

Figure F.BTM "EU" & "REU" Presses


Equalizing (EU & REU) presses have dowel pinholes to be used for precise location. Piping andclearance must allow for movement of the unit.(Figure F.)

Force Frame


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4.0 Equalizing Presses:Equalizing presses are useful in applications where both the punch and die must move clear of the partfor loading and unloading. Two types are available; Equalizing Units (EU) and Reverse Equalizing Units (REU).Both types provide two motions, for die positioning and punch entry.

How it works:

4.1 EU Models:EU models are used where the tooling mounted on the press anvil is the "first" motion (generally diepositioning) and the tooling mounted on the ram is the "second" motion (generally punch entry).

Press is mounted to a machine base, both die and ram tooling are retracted to allow loading of thepart onto stationary gauging. The open position stop collar is used to adjust the tooling position awayfrom the part. The equalize cylinder acts as an air spring, with constant pressure at port BB. Thispressure should be regulated to the minimum required to retract the tooling. Port AA is vented toatmosphere. (Figure I.)Air pressure at port A advances the ram tooling (die) to the part. The closed position stop collar isused to adjust the die position relative to the part.The remainder of the stroke is used to pull the (punch) tooling to the part, completing the work andcompressing the air spring.Air pressure is switched to port B, retracting the press ram. The first portion of this travel allowsthe air spring to extend, retracting the (punch) tooling.The remaining ram travel retracts the (die) tooling from the part.

OpenPos.Collar

ClosedPos.Collar

B

BB

OpenPos.Collar

ClosedPos.Collar

4.2 REU Models:REU models are used where the tooling mounted on the press ram is the "first" motion (generally diepositioning) and the tooling mounted on the anvil is the "second" motion (generally punch entry).

BBAAAA

A AA BB

1 1 2 3 4

8

Figure I.Figure H.

2 3 4 5 5

Press is mounted to a machine base, both die and ram tooling are retracted to allow loading of the partonto stationary gauging. The open position stop collar is used to adjust the die position away from thepart. (Figure H.)Air pressure at 40 psi (2.7 bar) is applied to port AA of the equalize cylinder, advancing the die tothe part. The closed position stop collar is used to adjust the die position to the part.Air pressure at 80 psi (5.5 bar) is applied to port A of the press, advancing the ram and punch tothe work.Air pressure is switched to port B, retracting the ram.Air pressure is switched to port BB, retracting the die.


How it works:

1.

2.

3.

4.5.

1.

2.

3.

4.

5.


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4.3 Design & Set Up:EU Model (Figure H)

Designing an EU model into a machine andsetting up the unit after installation are bothperformed with the unit in the closed position(air on port AA), and the open position stopcollar threaded away from the mount blockto its stop.The closed position stop collar is then turnedagainst the mount block until the open positioncollar is one inch from the mount block. Thissets the unit to the position shown in the catalogdrawings.Tooling is designed in this position relative tothe press keyway and the part position. The twostop collars may be used to fine tune the openand closed press positions.

REU Model (Figure I)Designing an REU model into a machine andsetting up the unit after installation are bothperformed with the unit in the closed position(air on port A), and the open position stop collarthreaded away from the mount block to its stop.The closed position stop collar is then turnedagainst the stop block until the open positioncollar is one inch from the mount block. Thissets the unit to the position shown in the catalogdrawings.Tooling is designed in this position relative tothe press keyway and the part position. Thetwo stop collars may be used to fine tune theopen and closed press positions.

5.0 Maintenance:Properly sized and applied, BTM Toggle Presses willprovide a long service life. They require only regularlubrication and a clean, dry air supply. After extendedservice, seal replacement may be necessary. This isa relatively simple procedure and is outlined in 5.2.

5.1 Lubrication:The BTM Air Toggle Press is a mechanical deviceusing air as its power source and therefore

requires dry, clean and lubricated air. A filter, regulatorand lubricator (FRL) provides properly conditioned airfor the seals and some mechanical lubrication. Uselight spindle oil in the lubricator. (A reclassifier isrecommended.) Grease fittings are provided on mostpresses to lubricate the bearing and link pins. Pressesshould be greased at every 20,000 cycles with the ramin the (UP) retracted position. Automatic greasing isrecommended for faster cycling systems and in multi-press fixtures. Use Amoco Rykotac EP (extremepressure) grease or equivalent. Note: Not all greasesare compatible. If any other greases will be used,contact BTM for compatibility information. Failure tofollow recommended lubrication procedures will voidwarranty. A video is available upon request detailinggeneral press maintenance and seal replacement.

5.2 Seal Replacement:Refer to the catalog page showing your press model toorder seal kit.5.2.1 Loosen all the cover plate nuts by two threads

only. Apply air to either port (80 psi maxi-mum). This will separate one of the coverplates from the press body.

5.2.2 Remove all the cover plates screws & nuts,and the cover plate. The opposite cover platewill usually remain sealed to the body, andmay be tapped loose using a wood block anda mallet. Remove the second cover plate.

5.2.3 Position the press body with the ram horizon-tal to prevent the ram from falling out whenthe link pin is removed. Remove the retainerring from the ram link pin. The link pins onP-1 models are pressed into one side of thelink and do not have retaining rings. Tap thelink pin out and slide the ram out of the body.

5.2.4 Remove the piston and link from the body,and remove the old seals from the piston.

5.2.5 Remove the ram O-Ring from the body.

1.

2.

3.

1.

2.

3.

9

The O-Ring on PB models is located on theram.

5.2.6 Clean all parts. Inspect all parts for signs ofwear or damage.



®

CORPORATION

5.2.7 Check the cover plates to see if a "pencil" out-line of the press cavity is visible. (Figure J.)If it is not , align the cover plates with thebody and outline the contour with a pencil.Repeat procedure on second cover plate.

1/49

12.2

5/1623

31.2

Screw SizeTorque in Ft / LbsTorque in N � m

Figure K.

3/850

67.8

5.2.8 Install new piston seals with "V" groovesfacing the powered surfaces of the piston.(Figure J.)(opposite each other)

5.2.9 Install new ram O-Ring.5.2.10 Grease and re-assemble the piston, link and

ram into the press body.5.2.11 Apply a thin layer of grease to the area of

the cover plates inside the "pencil" line.Apply a thin layer of Accuflex® tothe area outside the "pencil" line. (Figure J.)Do not apply sealant inside the line.

5.2.12 Assemble the cover plates to the press andtorque screws according to the chart in (FigureK). Make sure all threads are free of sealant. A slight bypass of air is normal due tothe rectangular seals.

10

Seals

Apply Grease

ApplyAccuflex®

Piston Travel

Figure J.

1 & 2 Ton 5 & 10 Ton 20 & 40 Ton

1/2110

149.0

Cover Screw Size & Torque



5.3 Replacing Components:Worn or damaged component parts may be replacedfollowing the same procedure described at 5.2.Components are listed on the catalog 98P pages foreach model. Presses may be returned to BTM forfactory repair.

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