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New Holland Tractor Workmaster 50 / Workmaster 60 / Workmaster 70 / Tier 4B (final). SERVICE MANUAL - page 6

Front axle system - Powered front axle

Four-Wheel Drive (4WD) axle - General specification

Axle class

Class 1

Unrestricted (static) axle capacity

2400.0 kg (5291.1 lb)

Bevel gear pair - differential

Pinion-ring gear ratio

9/38 = 1:4.2

Backlash between bevel gear pair

0.15 mm (0.006 in) - 0.20 mm (0.008 in)

Bevel drive and differential

2.5 mm (0.0984 in) - 2.55 mm (0.1004 in) -

2.6 mm (0.1024 in) - 2.65 mm (0.1043 in) -

2.7 mm (0.1063 in) - 2.75 mm (0.1083 in) -

2.8 mm (0.1102 in) - 2.85 mm (0.1122 in) -

2.9 mm (0.1142 in) - 2.95 mm (0.1161 in) -

3.00 mm (0.1181 in) - 3.05 mm (0.1201 in) -

3.10 mm (0.1220 in) - 3.15 mm (0.1240 in)

- 3.2 mm (0.1260 in) - 3.25 mm (0.1280 in)

- 3.3 mm (0.1299 in) - 3.35 mm (0.1319 in)

- 3.4 mm (0.1339 in) - 3.4 mm (0.1339 in) -

•

Thickness of pinion bearing adjustment shim

3.4 mm (0.1339 in) - 3.4 mm (0.1339 in) -

3.4 mm (0.1339 in) - 3.4 mm (0.1339 in) -

3.4 mm (0.1339 in) - 3.4 mm (0.1339 in) -

3.4 mm (0.1339 in) - 3.4 mm (0.1339 in) -

3.4 mm (0.1339 in) - 3.4 mm (0.1339 in) -

3.4 mm (0.1339 in) - 3.4 mm (0.1339 in) - 3.4 mm

(0.1339 in) - 3.45 mm (0.1358 in) - 3.5 mm

(0.1378 in) - 3.55 mm (0.1398 in) - 3.6 mm

(0.1417 in) - 3.65 mm (0.1437 in) - 3.7 mm

(0.1457 in)

2.5 mm (0.0984 in) - 2.6 mm (0.1024 in) -

2.7 mm (0.1063 in) - 2.8 mm (0.1102 in) - 2.9 mm

(0.1142 in) - 3.00 mm (0.1181 in) - 3.1 mm

•

Thickness of crown wheel position adjustment shim

(0.1220 in) - 3.2 mm (0.1260 in) - 3.3 mm

(0.1299 in) - 3.4 mm (0.1339 in) - 3.5 mm

(0.1378 in) - 3.6 mm (0.1417 in) - 3.7 mm

(0.1457 in)

•

Clearance between sides of planet and side pinion teeth

0.15 mm (0.006 in)

•

Thickness of planet pinion thrust washers

1.470 mm (0.058 in) - 1.530 mm (0.060 in)

•

Thickness of side gear thrust washers

1.50 mm (0.059 in) to 1.60 mm (0.063 in)

•

Diameter of cross pin for planet pinions

21.939 mm (0.8637 in) - 21.960 mm (0.8646 in)

•

Side diameter cross pin bore diameter

22.040 mm (0.8677 in) to 22.061 mm (0.8685 in)

•

Clearance between cross pin and bores

0.80 mm (0.0315 in) - 0.122 mm (0.0048 in)

•

Diameter of outer axle shafts and corresponding bushings

37.961 mm (1.4945 in) - 38.000 mm (1.4961 in)

•

Inside diameter of installed bushings

38.080 mm (1.4992 in) - 38.119 mm (1.5007 in)

•

Clearance between axle shafts and bushings

0.080 mm (0.0031 in) - 0.158 mm (0.0062 in)

•

Type of differential lock

LSD

Axle Shafts and Steering Knuckles

• Diameter of outer axle shafts and corresponding bushings

29.914 mm (0.0031 in) - 29.935 mm (1.1785 in)

• Inside diameter of installed front bushings

30.050 mm (1.1831 in) - 30.105 mm (1.1852 in)

• Clearance between pin and bushings

0.115 mm (0.0045 in) - 0.191 mm (0.0075 in)

• Interference fit between bushings and respective bores

0.064 mm (0.0025 in) - 0.129 mm (0.0051 in)

0.10 mm (0.0039 in) - 0.15 mm (0.0059 in) -

• Thickness of steering knuckle bearing adjuster plates

0.20 mm (0.0079 in) - 0.25 mm (0.0098 in) -

0.30 mm (0.0118 in)

Planetary final drives

15 mm (0.5906 in):( 19 mm (0.7480 in)+ 54 mm

• Reduction ratio

(2.1260 in)) = 1:4.87

• Driven gear thrust washer thickness

0.77 mm (0.0303 in) - 0.83 mm (0.0327 in)

Axle pivot

25.1 [25.100] / 3

Front axle system - Powered front axle

• Pivoting angle/oscillation (on either side)

11 °

• Center pivot and support end float

0.3 mm (0.0118 in) - 1.1 mm (0.0433 in)

• Maximum wear clearance

2 mm (0.0787 in)

• Center pivot diameter

52.652 mm (2.0729 in) - 52.671 mm (2.0737 in)

• Center pivot front bushing fitted

52.720 mm (2.0756 in) - 52.790 mm (2.0783 in)

• Center pivot working clearance in bushing

0.049 mm (0.0019 in) - 0.138 mm (2.0783 in)

• Rear bevel pinion carrier spigot

99.040 mm (3.8992 in) - 99.72 mm (3.9260 in)

• Rear bushing fitted

99.146 mm (3.9034 in) - 99.221 mm (3.9063 in)

• Spigot fitted clearance in bushing

0.074 mm (0.0029 in) - 0.181 mm (0.0071 in)

Axle front and rear thrust washer thickness

4.95 mm (0.1949 in) - 5.00 mm (0.1969 in)

Turning radius

• Turning radius with brakes

4200.0 mm (165.4 in)

• Turning radius without brakes

4850.0 mm (190.9 in)

Turnaround diameter

• Turnaround diameter with brakes

8720.0 mm (343.3 in)

• Turnaround diameter without brakes

10020.0 mm (394.5 in)

Maximum axle steering angle

62 °

Camber angle

1°

Caster angle

2°

Tire sizes

9.5 x 24

• Front 4WD

R4 12.5x18

14.9 x 28

• Rear 4WD

R4 18.4x24

25.1 [25.100] / 4

Front axle system - Powered front axle

Four-Wheel Drive (4WD) axle - Torque

GNIL14TR04345GB

1

Description

Thread size

Torque

Lock ring, bevel pinion (C1)

M35 x 1.5

294 N·m (217 lb ft)

Bolt, differential case to axle casing (C2)

M12 x 1.25

113 N·m (83 lb ft)

Bolt, ring gear to differential case (C3)

M12 x 1.25

127 N·m (94 lb ft)

Bolt, king pin (C4)

M10 x 1.25

64 N·m (47 lb ft)

Steering knuckle bolt (C5)

M10 x 1.25

64 N·m (47 lb ft)

Wheel hub bearings lock nut (C6)

M45 x 1.5

392 N·m (289 lb ft)

Bolt, planetary final drive housing (C7)

M10 x 1.25

64 N·m (47 lb ft)

Bolt, wheel disc to hub (C8)

M16 x 1.5

193 N·m (142 lb ft)

Nut for rim to disc securing bolt

M16 x 1.5

193 N·m (142 lb ft)

Front axle front and rear pivot support bolt (C9)

M18 x 1.5

280 N·m (207 lb ft)

Differential cage support cap bolt (C10)

M12 x 1.25

113 N·m (83 lb ft)

Front axle support to engine retaining bolt (C11)

M18 x 1.5

314 N·m (232 lb ft)

25.1 [25.100] / 5

Front axle system - Powered front axle

Four-Wheel Drive (4WD) axle - Special tools

GNIL14TR04346HA

1

25.1 [25.100] / 6

Front axle system - Powered front axle

GNIL14TR04347HA

2

25.1 [25.100] / 7

Front axle system - Powered front axle

Four-Wheel Drive (4WD) axle - Sectional view

GNIL14TR04350FB

1

H

1.000 mm (0.039 in)

23

Rear thrust washer

L

1.000 - 1.500 mm (0.039 - 0.059 in)

24.

Rear bushing

S5

Sleeve position shim

25.

Rear axle pivot support

C9

Axle pivot support bolt

26.

Retaining rings

C10

Differential bearing cap bolt

27.

Front splined sleeve

C11

Bolt securing front axle support to engine

28.

Retaining rings

20.

Front axle pivot support

29.

Drive shaft guard

21.

Front bushing

30.

Drive shaft

22.

Front thrust washer

25.1 [25.100] / 9

Front axle system - Powered front axle

GNIL14TR04351GB

2

X

0.500 - 1.000 mm (0.020 - 0.039 in)

4.

Ring gear

S1

Bevel pinion bearing shim

5.

Axle shaft with universal joint

S2

Bevel pinion position shim

6.

Side gear washers

C1

Bevel pinion bearing lock ring

7.

Differential pinion washers

C2

Differential carrier bolt

8.

Differential pinion journal bolt

C3

Ring gear bolt

60.

Side gear

Gd,

Right-hand side and left-hand side differential

61.

Side gear

Gs

bearing lock ring

1.

Bevel pinion

62.

Differential pinion

2.

Seal

63.

Differential pinion journal

3.

Bevel pinion bearing spacer

25.1 [25.100] / 10

Front axle system - Powered front axle

GNIL14TR04352GB

3

S3

King pin bearing shim

11.

King pin bearing

S4

Wheel hub bearing shims

12.

Seal

C4

King pin bearing bolt

13.

Seal

C5

Steering knuckle bolt

14.

Axle shaft bushing

C6

Wheel hub bearing lock ring

15

Spacer

C7

Final drive housing bolt

16.

Thrust washers

C8

Wheel hub bolt

17.

Planet wheel journals

9.

Bearing carrier bolt

18.

Planet wheel shims

10.

Seal

19.

Sun gear

25.1 [25.100] / 11

Front axle system - Powered front axle

Four-Wheel Drive (4WD) axle - Remove

WARNING

Heavy objects!

Lift and handle all heavy components using lifting equipment with adequate capacity. Always support

units or parts with suitable slings or hooks. Make sure the work area is clear of all bystanders.

Failure to comply could result in death or serious injury.

W0398A

NOTE: The front axle assembly can be removed from the tractor either with or without previously removing the drive

shaft. The description below refers to removal of the front axle with the drive shaft installed on the tractor.

1. Disconnect the negative battery terminal (1).

GNIL14TR00784AA

1

2. Remove the front weights (1).

GNIL14TR00756AA

2

3. Remove the bolts (1), and remove the drive shaft

guards (2).

GNIL14TR00858AA

3

25.1 [25.100] / 12

Front axle system - Powered front axle

4. Remove the snap ring (1) from the front and rear of the

drive shaft.

GNIL14TR04359AB

4

5. Remove the bolts (1) from the drive shaft support bear-

ing.

6. Remove the drive shaft from the front axle input shaft

and drop box output shaft by sliding the two couplers

onto the drive shaft.

GNIL14TR00859AA

5

7. Attach nylon slings around the front axle and attach

them to a hoist.

8. Lift the tractor with the hoist and place a stand under

the lower portion of the front axle.

GNIL14TR04361AA

6

9. Remove the power steering hoses (1) from the power

steering tubes.

GNIL14TR04362AB

7

25.1 [25.100] / 13

Front axle system - Powered front axle

10. Remove the front wheels.

GNIL14TR04363AA

8

11. Remove the front axle rear support retaining bolts (1).

GNIL14TR04364AB

9

12. Remove the front axle front support retaining bolts (1).

13. Using a hoist and nylon cables (one for each side)

detach the front axle from the tractor.

GNIL14TR04365AB

10

25.1 [25.100] / 14

Front axle system - Powered front axle

Four-Wheel Drive (4WD) axle - Remove

WARNING

Heavy objects!

Lift and handle all heavy components using lifting equipment with adequate capacity. Always support

units or parts with suitable slings or hooks. Make sure the work area is clear of all bystanders.

Failure to comply could result in death or serious injury.

W0398A

Proceed as follows:

NOTE: The front axle assembly can be removed from the

tractor either with or without previously removing the drive

shaft. The description below refers to removal of the front

axle with the drive shaft installed on the tractor.

1. Disconnect the negative battery lead (1).

GNIL14TR00784AA

1

2. remove the front weights (1).

GNIL14TR00829AA

2

3. Remove the bolts (1), and remove the drive shaft

guards (2).

GNIL14TR00859AA

3

25.1 [25.100] / 15

Front axle system - Powered front axle

4. Remove the snap ring (1) from the front and rear of the

drive shaft.

GNIL14TR04359AB

4

5. Remove the bolts (1) from the drive shaft support bear-

ing.

6. Remove the drive shaft from the front axle input shaft

and drop box output shaft by sliding the two couplers

onto the drive shaft.

GNIL14TR00859AA

5

7. Attach nylon slings around the front axle and attach

them to a hoist.

8. Lift the tractor with the hoist and place a stand under

the lower portion of the front axle.

GNIL14TR04361AA

6

9. Remove the power steering hoses (1) from the power

steering tubes.

GNIL14TR04362AB

7

25.1 [25.100] / 16

Front axle system - Powered front axle

10. Remove the front wheels.

GNIL14TR04363AA

8

11. Remove the front axle rear support retaining bolts (1).

GNIL14TR04364AB

9

12.

1. Remove the front axle front support retaining bolts

(1).

2. Using a hoist and nylon cables (one for each side)

detach the front axle from the tractor.

GNIL14TR04365AB

10

25.1 [25.100] / 17

Front axle system - Powered front axle

Four-Wheel Drive (4WD) axle - Disassemble

WARNING

Avoid injury!

Handle all parts carefully. Do not place your

hands or fingers between parts. Use Personal

Protective Equipment (PPE) as indicated in this

manual, including protective goggles, gloves,

and safety footwear.

Failure to comply could result in death or seri-

ous injury.

W0208A

GNIL14TR04367AA

1

1. Remove plug (1) and drain the oil from the axle cas-

ing.

GNIL14TR04368AB

2

2. To drain the final drive oil, remove plug (1) on the

left-hand final drive casing.

3. Repeat the same operation on the right-hand side

casing.

GNIL14TR04369AB

3

4. Remove the rear support (1) off the front axle.

5. Remove the front support and the thrust washer.

GNIL14TR04370AB

4

25.1 [25.100] / 19

Front axle system - Powered front axle

6. Remove the tie rod retaining nuts (1).

GNIL14TR04371AB

5

7. Using a removal tool, remove the tie rod ends from

their bores in the stub axle housing.

GNIL14TR04372AA

6

8. Remove the snap ring from the bottom of the cylinder

rod pivot pin (1)

9. Remove the pin retaining bolt (2) from the pin. Re-

move the pins and detach the cylinder.

GNIL14TR04373AB

7

10. Unscrew the retaining bolts off the left-hand final

drive casing cover (1).

11. Screw in the two M10 x 100 dowels tool no

380002813

(2).

12. Using a slide hammer puller screwed into the oil

drain plug.

13. Detach the cover (1) from the casing.

GNIL14TR04374AB

8

25.1 [25.100] / 20

Front axle system - Powered front axle

14. Remove the snap ring (1).

15. Remove the driving gear (2).

GNIL14TR04375AB

9

16. Remove the staking (1) on the wheel hub bearing

lock ring (2).

GNIL14TR04377AB

10

17. Remove the wheel hub bearing lock ring using tool

no 380000295 (1).

GNIL14TR04378AB

11

18. Remove the wheel hub (1) with the ring gear (2).

GNIL14TR04379AB

12

25.1 [25.100] / 21

Front axle system - Powered front axle

19. Remove the retaining bolts (1) of the lower pivot pin

of the stub axle housing.

20. Remove the lower pivot pin and the relative adjust-

ment shims.

GNIL14TR04380AB

13

21. Remove the retaining bolts of the upper pivot pin.

22. Remove the upper pivot pin (1).

23. Remove the stub axle housing (2).

GNIL14TR04381AB

14

24. Remove the retaining bolt (1) of the axle shaft (2).

GNIL14TR04382AB

15

25. Using a pry bar, pull the axle shaft out of the casing.

26. To disassemble the right-hand final drive unit, re-

peat the above steps [Invalid Reference] to [Invalid

Reference].

GNIL14TR04383AA

16

25.1 [25.100] / 22

Front axle system - Powered front axle

27. Remove the bolts fixing the bevel drive-differential

support to the axle casing.

28. Screw in the M12 x 100 dowels, tool no 380002814

(1).

29. Remove the remaining bolts and separate the bevel

drive-differential support from the axle casing.

30. Attach a chain (2) to the support and take up the

weight with the hoist.

31. Remove the bevel drive-differential support (3) from

the axle casing.

GNIL14TR04384AB

17

32. Remove the two bolts (1) from the two ring gear

differential support caps (2).

33. Remove the crown wheel-differential assembly

from the housing.

GNIL14TR04385AB

18

34. Remove the snap ring (1) from the splined shaft (2).

GNIL14TR04386AB

19

35. Straighten the locking tab on the splined shaft lock

nut (1).

GNIL14TR04387AB

20

25.1 [25.100] / 23

Front axle system - Powered front axle

36. Remove the nut using wrench, tool no 380000268

(1), while holding the bevel drive pinion shaft against

rotation with wrench, tool no 380000257.

GNIL14TR04388AB

21

37. Remove the splined shaft detent ball (1).

GNIL14TR04389AB

22

38. Remove the bevel drive pinion shaft (1) from the

rear of the casing and remove the spacer, the adjust-

ment shims and the bearing.

NOTE: Observe the quantity and the size of the shims re-

moved from the pinion shaft.

GNIL14TR04390AB

23

39. Using a screwdriver, remove the dust seal, seal ring

(1) and rear bearing.

GNIL14TR04391AB

24

25.1 [25.100] / 24

Front axle system - Powered front axle

Four-Wheel Drive (4WD) axle - Adjust

Adjustment of the ring gear bearings and checking the backlash between the pinion and

ring gear

Proceed as follows.

1. Install the differential assembly complete with ring gear

and inner ring gear bearing rings in the bevel drive/

differential housing.

GNIL14TR04392AA

1

2. Insert the outer bearing rings in the differential housing.

Install the differential support caps. Torque the bolts to

59 N·m (44 lb ft), then loosen and re-tighten to a torque

of 20 N·m (15 lb ft).

GNIL14TR04399AB

2

3. With the bearings lubricated, rotate the ring gear and

at the same time tighten the threaded adjustment ring

using wrench, tool no 380000252 (A) to a torque of 39 -

59 N·m (29 - 44 lb ft) to take up the axial play between

the components.

GNIL14TR04393AB

3

25.1 [25.100] / 27

Front axle system - Powered front axle

4. Measure the backlash between pinion and ring gear,

using a dial gauge (1) perpendicular to the outer edge

of a tooth on the ring gear (2).

5. Repeat the measurement in two other positions 120°

apart and compare the average of the three values

(Gm) with the prescribed normal backlash specifica-

tion of 0.18 mm (0.007 in) - 0.23 mm (0.009 in) aver-

age value 0.20 mm (0.008 in).

If the measured backlash exceeds the prescribed

value, adjust the threaded adjustment rings by screw-

ing one of the rings in and the other out by the same

amount to correct the axial preload and thus obtain the

prescribed backlash.

NDIL14TR00427AB

4

6. With a dial gauge positioned perpendicular to the out-

side edge of one of the ring gear teeth, check that the

backlash between the pinion and ring gear is within

the tolerance limits of 0.18 mm (0.007 in) - 0.23 mm

(0.009 in).

GNIL14TR04393AB

5

7. Using a wrench, tool number 380000252 (A) turn the

threaded adjustment ring and check, using torque

wrench (2) that the combined rolling resistance torque

of the ring gear and pinion bearings is:

A2 = A1 + 1.0 N·m (0.74 lb ft) to 1.5 N·m (1.11 lb ft).

where:

A2 = combined ring gear/pinion rolling resistance

torque

A1 = rolling resistance torque of pinion only as mea-

sured previously

1.0 N·m (0.74 lb ft) to 1.5 N·m (1.11 lb ft) = rolling re-

sistance torque of crown wheel only measured at the

end of the pinion using wrench, tool number 380000257

and a torque wrench.

GNIL14TR04397AB

6

8. Tighten the cap bolts see figure in Four-Wheel Drive

(4WD) axle - Torque (25.100) to a torque of 113 N·m

(83 lb ft).

9. Install the safety plate, screwing the threaded adjust-

ment ring in or out up to the nearest notch.

10. Attach the bevel drive/differential to the axle casing af-

ter having carefully cleaned and degreased the mat-

ing surfaces and applied a bead of gasket eliminator

LOCTITE® 518, approx. 2 mm (0.08 in) wide along the

line shown in the figure.

25.1 [25.100] / 28

Front axle system - Powered front axle

11. Gasket eliminator LOCTITE® 518 application diagram

for assembly of bevel drive unit and epicyclic final

drive unit.

GNIL14TR04394AB

7

25.1 [25.100] / 29

Front axle system - Powered front axle

Four-Wheel Drive (4WD) axle - Toe in adjust

When travelling forward in a straight path, the wheels

of four-wheel drive tractors must be parallel to the lon-

gitudinal axis of the tractor, alternatively a slight toe-in

of the front wheels is permissible up to a maximum of

6 mm (0.24 in) as measured at the edges of the wheel

rims.

To check the exact value of the toe-in setting of four-

wheel drive tractors, proceed as follows.

1.

Inflate the front tires to the prescribed pressure.

2.

Position the steering at the straight ahead position

(along the longitudinal axis of the tractor).

3.

Check that the wheels are parallel to the longitudinal

axis of the tractor.

4.

Make a chalk mark on the front inside edges of both

wheel rims, at the height of the wheel hub centers.

Measure the distance (1) between the chalk marks.

5.

Move the tractor forward to turn both front wheels

through 180 °The chalk marks will now be measure

between the rear inside edges of the wheel rims at the

height of the wheel hub centers. Now measure the

distance (2) checking that this new measurement is

equal to or greater than the distance (1) by a maximum

or 6 mm (0.24 in).

The rotation of the wheels through 180 ° is necessary to

eliminate the effect of wear, misalignment or distortion

of the wheel rims on the measurements obtained.

GNIL14TR04416AB

1

6.

If it is necessary to correct the wheel alignment, re-

move nut (1) and pull the tie rod end out of its housing.

Loosen the locknut (2) and screw the tie rod end (3) in

or out to increase or decrease the distance (2).

Reposition the tie rod end in its housing and re-check

alignment.

After having adjusted the toe in to within the prescribed

limits, tighten locknut (2) to a torque of 180 N·m (133 lb

ft) and nut (1) to 100 N·m (74 lb ft).

NOTE: The self-locking nut (1), must be replaced each time

it is removed or partially unscrewed.

GNIL14TR04400AB

2

25.1 [25.100] / 30

Front axle system - Front bevel gear set and differential

Differential - Adjust - 4WD Front axle

Prior operation:

Four-Wheel Drive (4WD) axle - Disassemble (25.100).

End play adjustment

In case of differential assembly overhaul it is necessary

to adjust the backlash between the teeth of the planet

pinions and side gears.

Proceed as follows:

1. Thoroughly clean the components of the differential to

remove any traces of oil which would otherwise prevent

accurate backlash measurement.

2. Install the two side gears without thrust washers.

3. Install the planet pinions complete with thrust washers

and pins and screw the pin retaining bolts in by a few

turns to hold the pins in place.

4. Position a dial gauge on the differential housing.

5. Move the left-hand side gear to bring it into full contact

with the planet pinion and then push it up against the

differential housing, reading the end play (GL) on the

dial gauge.

20097712

1

6. Repeat the above operations to measure the end play

on the right-hand side gear (GR).

The end play should be 0.25 mm (0.010 in). Therefore

the shims to be inserted in the differential housing are

given by:

Shim (left) = GL - 0.25 mm (0.010 in) for the left-hand

side gear.

Shim (right) = GR - 0.25 mm (0.010 in) for the right-

hand side gear.

20097713

2

25.2 [25.102] / 3

Front axle system - Front bevel gear set and differential

7. Install shims, (1), as near as possible to the calculated

value. Use a dial gauge and following the procedure

described above, check that the end float of the left

and right-hand side gears is approximately 0.25 mm

(0.010 in).

20097714

3

Differential side gear shim sizes

Available shim sizes mm (inches)

1.0 mm (0.039 in)

1.6 mm (0.063 in)

1.1 mm (0.043 in)

1.7 mm (0.067 in)

1.2 mm (0.047 in)

1.8 mm (0.071 in)

1.3 mm (0.051 in)

1.9 mm (0.075 in)

1.4 mm (0.055 in)

2.0 mm (0.039 in)

1.5 mm (0.059 in)

25.2 [25.102] / 4

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