Mechanical Power Take-Off Clutches Overview

The WPT power take-off is suitable for inline and side load applications on all internal combustion engines with standard SAE flywheel housing dimensions. All PTOs and parts are 100% interchangeable with existing PTOs. All units are supplied with sealed ball pilot bearings to eliminate lubrication problems normally encountered. Ball bearing throw-out collars are optional on 14” units and standard on 311 units. Please pay close attention to certain application criteria including speed, side load, and clutch torque.

  SPECIFICATIONS :  

Model/ Size

Available SAE Housing Sizes

Maximum Input Torque Ib-ft(Nm)

Duty Service Classification MaximumClutch Ratings hp (Kw)a

Maximum Speed rpmb

Approx.Net Weight lbs (kgs)

Class 1

Class 2

Class 3

Class 4

C107

6,5,4

177 (240)

57 (43)

38 (28)

28(21)

3200

56(25.4)

C108

5,4,3

230 (312)

68(51)

45 (34)

34 (25)

3100

73(33.1)

C110

4,3,2

329 (446)

98 (73)

65 (49)

49 (37)

3400

117(53.1)

SP111

3,2,1

452 (613)

128 (95)

85 (63)

64 (48)

3200

143(64.9)

SP211

3,2,1

904 (1 226)

255 (190)

170 (128)

128(95)

3200

157(71.2)

SP311

3,2

1,620 (2 200)

383 (286)

252 (188)

189(141)

3200

223(101.2)

SP114

1,0

800 (1 085)

194 (145)

125 (93)

94 (70)

2400

263(119.3)

SP214

1,0

1,600 (2 170)

388 (289)

252 (188)

190(142)

2400

332(150.6)

SP314

1,0

2,400 (3 255)

582 (434)

374 (279)

281 (210)

2400

413(187.3)
Duty Service Classifications

CLASS 1
Primarily used as a disconnect clutch. Light loads with minimal slip.
CLASS 2
Primarily used as a disconnect clutch. Light to medium loads with a maximum 2 second slip before engagement.
CLASS 3
Used to start medium loads. Maximum 3 second slip before engagement.
CLASS 4
Used to start heavy loads. Maximum 4 second slip before engagement.

a Horsepower (Kw) ratings may be increased with optional clutch plates.

b Contact WPT Engineering for applications requiring higher speeds.

c If in doubt of proper duty service class to use consult WPT Engineering for application assistance. Attention must also be paid to the maximum speed rating and side load capacities in addition to clutch ratings. Clutch ratings are based on engagement at low idle speed and once engaged clutch must be engaged for at least one hour before disconnecting.

HOUSING DIMENSIONS inches (mm)

SAE HSG#

 A
OUTSIDE DIA		 B
BOLT CIRCLE		 C
+.000/-.005 (+.00/-.13)		 D HOLE V
QTY DIA

6

12 1/8 (308.0)

11.25 (285.8)

10.500 (266.70)

8

13/32 (10.3)

7 3/4 (196.9)

5

14 (355.6)

13.13 (333.4)

12.375 (314.33)

8

13/32 (10.3)

7 3/4 (196.9)

4

15 7/8 (403.2)

15.00 (381.0)

14.250 (361.95)

12

13/32 (10.3)

7 3/4 (196.9)

3

17 3/4 (450.9)

16.88 (428.6)

16.125 (409.58)

12

13/32 (10.3)

9 3/4 (247.7)

2

19 1/4 (489.0)

18.38 (466.7)

17.625 (447.68)

12

13/32 (10.3)

9 3/4 (247.7)

1

21 3/4 (552.5)

20.88 (530.2)

20.125 (511.18)

12

15/32 (11.9)

9 3/4 (247.7)

1/2

25 1/2 (647.7)

24.38 (619.1)

23.000 (584.20)

12

17/32 (13.5)

9 3/4 (247.7)

0

28 (711.2)

26.75 (679.5)

25.500 (647.70)

16

17/32 (13.5)

12 3/4 (323.9)

00

34 3/4 (882.7)

33.50 (850.9)

31.000 (787.40)

16

17/32 (13.5)

16 3/4 (425.5)

MECHANICAL POWER TAKE-OFFs DIMENSIONS inches (mm)

MODEL/ SIZE SAE HSG #

 

 SHAFT  

TRAVEL
(DEGREES)
o{

E

F
+.0000/-.0005 (+.000/-.013)

G

H

J

K4

L

M

 N

P
+.000/-.001 (+.00/-.03)

R
KEYWAY

S

T

u

w

WTD C107 4,5,6

7 1/2 (190.5)

2.0472 (52.000)

15/16 (33.3)

1 11/16 (42.9)

1 3/16 (30.2)

213/16
(71.4)

5 9/16 (141.3)

7/8 (22.2)

3 1/2 (88.9)

1.438 (36.51)

3/8x3/16 (9.5x4.8)

41/2 (114.3)

21/82 (54.0)

3 (76.2)

15 3/8 (390.5)

13°

WTD C108 3,4,5

8 (203.2)

2.4409 (62.000)

1 3/16 (30.0)

1 7/16 (36.5)

2 7/16 (61.9)

315/16 (100.0)

71/16
(179.4)

2 11/32 (59.5)

6
(152.4)

1.750 (44.45)

1/2 x 1/4 (12.7x6.4)

5 (127.0)

1 7/8 (47.6)

3
(76.2)

15 3/8 (390.5)

17°

WTD C110 3,4

10
(254.0)

2.8346 (72.000)

1 1/2 (38.1)

13/4
(44.5)

21/8 (53.8)

315/16 (100.0)

8 5/8 (219.1)

3 3/4 (95.3)

5 1/2 (139.7)

2.250 (57.15)

5/8x5/16 (15.9x7.9)

5 3/4 (146.1)

23
(50.8)

3 (76.2)

15 3/8 (390.5)

15°

WTD SP111 2,3

11 3/8 (288.9)

2.8346 (72.000)

1 53/64
(46.5)

2 17/64
(57.4)

1 9/16 (39.7)

315/16 (100.0)

9 1/4 (235.0)

3 3/4 (95.3)

61/2 (165.1)

2.250
(57.15)

5/8x5/16 (15.9x7.9)

5 3/4 (146.1)

3 3/16 (81.0)

3
(76.2)

15 3/8 (390.5)

15.5°

WTD SP211 2,3

11 3/8 (288.9)

2.8346 (72.000)

1 59/64 (48.8)

2 5/16
(58.7)

1 9/16 (39.7)

3 15/16 (100.0)

9 5/8 (244.5)

3
( 76.2)

61/2 (165.1)

2.500 (63.50)

5/8x5/16 (15.9x7.9)

61/2 (165.1)

41/16 (103.2)

3 3/4 (95.3)

15 3/8 (390.5)

15.5°

WTD SP311 2,3

11 3/8 (288.9)

2.8346 (72.000)

2 21/64 (58.9)

2 17/64
(57.4)

1 9/16 (39.7)

3 15/16
(100.0)

13 57/64 (352.8)

3 3/8
(85.7)

10 (254.0)

3.500
(88.90)

7/8x7/16 (22.2x11.1)

71/2 (190.5)

6 5/8
(168.3)

4 1/2 (114.3)

23 3/8 (593.7)

18°

WTD SP114 1

14 (355.6)

3.1496 (80.000)

2 7/16 (61.9)

2 53/64
(71.6)

1 (25.4)

3 15/16 (100.0)

12 1/8 (308.0)

3 7/16 (87.3)

81/2 (215.9)

3.000
(76.20)

3/4 x 3/8 (19.1x9.5)

6 21/32 (169.1)

5 7/16 (138.1)

4 1/2 (114.3)

23 3/8 (593.7)

18°

WTD SP214 1,0

14 (355.6)

3.1496 (80.000)

2 3/8 (60.3)

2 53/64
(71.6)

1 (25.4)

3 15/16
(100.0)

13 3/4 (349.3)

3 3/8 (85.7)

10 (254.0)

3.500
(88.90)

7/8x7/16 (22.2x11.1)

7 1/2 (190.5)

6 5/8
(168.3)

4 1/2 (114.3)

23 3/8 (593.7)

18°

WTD SP314 1,0

14 (355.6)

3.9370 (100.000)1

2 7/16 (61.9)

2 53/64 (71.6)

1 (25.4)

3 15/16 (100.0)

14 1/2 (368.3)

3 3/8 (85.7)

10 (254.0)

3.938
(100.01)

1x1/2 (25.4x12.7)

71/2 (190.5)

7 3/4 (196.9)

41/2 (114.3)

23 3/8 (593.7)

18°

1 Also available with 80mm pilot bearing

2 2 5/8 (66.7) for SAE #5 bellhousing

3 3 5/32 (54.8) for SAE #4 bellhousing

4 Flywheel housing face to bottom of pilot bore in flywheel

5 Support plate for SP311/214/314 is required for sideload applications and recommended for in-line applications
 
 
     
Copyright © 1992-2007, * WPT® is a registered trademark of WPT Power Transmission Corporation, Twin Disc® is a registered trademark of Twin Disc Corp., and Wichita Clutch® is a registered trademark of Wichita/Altra. WPT is not an authorized original equipment manufacturer of Twin Disc® or Wichita Clutch® products.