Helpful guide for Twin Disc/Rockford PTOs: Available SAE Housing Sizes, Available Clutch Sizes, Torque Capacities & Key Dimensions - Tech Tip #57
Need help sizing a Twin Disc/Rockford power takeoff? Do you find Twin Disc PTO Model Numbers confusing? The chart below will help you. The first column "PTO Model Number" lists the available Twin Disc power takeoffs by the number of clutch plates and clutch size. In other words, Twin Disc PTO part numbers are based on the physcal size of the PTO and its internal components.
Specifications
|
Application Duty Classification
|
Class 1
|
Clutch Maximum HP Rating
see note 2
|
PTO Model
Number
|
Available
Hsg. Sizes
SAE
|
Max. Input Torque
Lb. Ft.
|
Class II
|
Class III
|
Class IV
|
Apprx. Weight
in LBS.
|
C-106SP
C-107SP
C-108SP
C-110SP
C-111SP
|
6,5,4
6,5,4
5,4,3
4,3,2,1
4,3,2,1
|
159
175
230
328
387
|
40
54
61
96
124
|
27
36
41
64
82
|
20
27
31
48
62
|
53
65
72
115
120
|
SP-11P
SP-111HP
SP-111OP
|
3,2,1
3,2,1
3,2
|
455
|
124
|
82
|
62
|
129
141
145
|
SP-211HP
SP-211OP
|
3,2,1
2,1
|
909
|
247
|
165
|
124
|
155
175
|
SP-311P
|
2,3
|
1620
|
371
|
247
|
186
|
220
|
SP-114P
|
1,0
|
810
|
188
|
125
|
94
|
260
|
SP-214P
SP214OP
|
1,0
|
1620
|
376
|
251
|
188
|
328
340
|
IBF-240OP
IBF-214OP
|
1,0
|
1620
|
395
|
264
|
197
|
470
|
SP-314HP
SP-314HP
|
1,0
|
2430
|
564
|
376
|
282
|
408
|
IBF-314OP
IBF-314OP
IBF-314OP
|
1,0
|
3040
|
7413
|
494 |
3713
|
595 |
SP-218OP
SP-218OP
|
0,00
|
4000
|
622
|
415
|
311
|
660
|
SP-318P
|
0
|
6000
|
933
|
622
|
467
|
700
|
IBF-318OP
IBF-318OP
IBF-318OP
|
0
|
7500
|
12243
|
8163
|
6123 |
920 |
SP-321P
IBF-321OP
|
0,0
0,0
|
6730
8400
|
1270
16673
|
847
11113
|
635
8343
|
1110
1210
|
The first digit in the alphanumerical Twin Disc model number is the number of clutch platees. The next digit of the Twin Disc model number is the clutch size in inches. Putting this together, a Twin Disc Model C106SP is a single plate, 6" clutch. The next column lists the available power takeoffs by SAE bell housing sizes. To continue our example, a Twin Disc Model C106HP5 has an SAE #5 housing. If you are rusty on SAE housing dimensions, take a look at our Shop Kink #21, SAE Bell Housings Made Easy!. The next column lists the maximum torque capacity that a particular clutch size will handle. The next two columns refer to SAE duty classifications for PTOs, and the last column gives the weight.
We hope that this Tech Tip has been helpful. This is one in a number of Tech Tips and Shop Kinks that we publish to inform the industrial engine community. As always your comments are welcome. You can pass them on to our Dr Diesel by emailing him at DrDiesel@FoleyEngines.com.
If you are in the market for a new or replacement powertakeoff, take a look at our Shop Kink #47, Twin Disc and Rockford Powertakeoffs, How To Order. If you already have a power takeoff but want it to be more productive, take a look at our Shop Kink #37, How to Make Your Twin Disc or Rockford Power Takeoff Last Longer. If you would like pricing on a new or remanufactured Twin Disc PTO simply call us at 800 233 6539. We have most models in stock and ready for same-day shipment.
Please call us with any questions. We take tech support seriously!
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