Power Take-Off Clutch - Selection Guide

Selection Guide to Duty Classification
Duty Application
Light Pumps-centrifugal, Hydraulic pumps (with out priming), Irigation pumps, Cereal dryers, Elevators-bucket, Machines general-all types with uniform loads and non reversing, Bow thruster, Generators
Medium Agitators-solid or semi solids, Blowers & fans centrifugal, screw, Elevators-bucket or non-uniformly loaded or fed, Mixers-continuous, Pumps-two or more cylinders, Conveyors-uniformly loaded, Dredge pumps 
Heavy Cranes & Hoists working clutch, Compressors-lobe rotary plus three or more cylinder reciprocal type    Drums, braking, Machines-impact lode types, Mills-ball type, Mud pumps
Extra Heavy Crushers-ore and stone, Chiper-wood, Mills-hammerl type, Shaker - reciprocating type

 

Maximum Torque Capacity
The torque capacities shown are the maximum clutch capacities, and include saftey factors dependant upon the type of application.
 
    Duty Classification  
Clutch Size Maximum Torque Light Medium Heavy Max. Safe Speed
Inches Lbs.Ft HP HP HP RPM
6 single 159 40 27 20 3500
7 single 175 54 36 27 3200
8 single 230 61 41 31 3100
10 single 328 96 64 48 3600
11.5 single 455 124 82 62 3600
11.5 double 909 247 165 124 3600
14 single 810 188 125 94 2500
14 double 1620 376 251 188 2500
14 triple 2430 564 376 282 2500
 
Torque calculation: Use the formula Torque (lb.ft) = 5252 x hp / rpm and the appropriate saftey factor to determine
the correct clutch size for any application. Clutch Torque Capacity = Gross Torque Capacity / Saftey Factor
Clutch size requirements should be based on peak torque capability of the engine.

 

Installation Reference Dimensions
P.T.O. Shaft  
Type Dia Length Key PTO                     Lever Travel
  F E G dia B C H J M-dia D V W X Y L degrees
6"single 1.438 3.5 3/8x3/16 6.5 2.81 0.88 4.50 2.0472 5.56 3.0 2.13 1.31 1.68 1.19 13o
7"single 1.438 3.5 3/8x3/16 7.5 2.81 0.88 4.50 2.0472 5.56 3.0 2.13 1.31 1.68 1.19 13o
8"single 1.750 6.00 1/2x1/4 8.0 3.94 2.34 5.00 2.4409 7.06 3.0 1.88 1.18 1.44 2.44 17o
10"single 2.250 5.50 5/8x5/16 10.0 3.94 3.75 5.75 2.8346 8.63 3.0 2.00 1.50 1.75 2.12 15o
11.5"single 2.250 6.50 5/8x5/16 11.5 3.94 3.75 5.75 2.8346 9.25 3.0 3.19 1.83 2.26 1.56 15.50o
11.5"double 2.500 6.50 5/8x5/16 11.5 3.94 3.00 6.50 2.8346 9.63 3.75 4.06 1.92 2.31 1.56 15.50o
14"single 3.000 8.50 3/4x3/8 14.0 3.94 3.44 7.50 3.1496 12.13 4.5 5.44 2.44 2.82 1.00 18o
14"double 3.500 10.00 7/8x7/16 14.0 3.94 3.38 7.50 3.1496 13.75 4.5 6.63 2.38 2.82 1.00 18o
14"triple 3.938 10.00 1x1/2 14.0 3.94 3.38 7.50 3.1496 14.50 4.5 7.75 2.44 2.82 1.00 18o
Dimensions are for the standard range of P.T.O.'s
Pilot bearing (M diameter) supplied on application
Support plates are required for double and triple plate 14" P.T.O.'s on side loaded, and recommended for in-line applications

SAE Housings
S.A.E. Housing A R (bolt) S T (bolt holes) P (shaft) Theta
Number Diameter Circle dia O.D. Number Diameter Length Degrees
0 25.500 26.750 28.00 16 0.53 12.75 11o15'
1 20.125 20.875 21.75 12 0.47 9.75 15o
2 17.625 18.375 19.25 12 0.41 9.75 15o
3 16.125 16.875 17.75 12 0.41 9.75 15o
4 14.250 15.000 15.88 12 0.41 7.75 15o
5 12.375 13.125 14.00 8 0.41 7.75 15o
6 10.500 11.250 12.13 8 0.41 7.75 15o

 

Drive Ring Dimensions
Description Type Ring O.D. Bolt Circle Nom. Pitch       Holes Teeth 20 deg PA Approx. Weight
    A B dia C D E F No. Size No. P. (lbs)
6" single A 8.5 7.875 7.000 0.63 - - 6 21/64 42 6/8 2.8
7" single A 9.5 8.750 7.828 0.63 - - 8 21/64 47 6/8 3.4
8" single A 10.375 9.625 8.500 0.63 - - 8 13/32 51 6/8 4.3
10" single A 12.374 12.369 11.630 11.620 10.515 10.510 0.88 - - 8 13/32 63 6/8 7
11.5" single A 13.874 13.869 13.130 13.120 12.015 12.010 0.88 - - 8 13/32 72 6/8 8
11.5" double A 13.874 13.869 13.130 13.120 12.015 12.010 1.88 - - 8 13/32 72 6/8 18
14" single B 13.374 13.367 17.255 17.245 14.765 14.760 1.13 0.50 16.00 8 17/32 59 4/5 17
14" double B 13.374 13.367 17.255 17.245 14.765 14.760 2.38 0.50 16.00 8 17/32 59 4/5 26
14" triple B 13.374 13.367 17.255 17.245 14.765 14.760 3.38 0.50 16.00 8 17/32 59 4/5 33

 

Allowable Side-Pull Load (see formula below)
  X Distance in inches
P.T.O. Speed 1 2 3 4 5 6 7 8 9
Size R.P.M LBF LBF LBF LBF LBF LBF LBF LBF LBF
6"single 2000 665 595 475            
7"single 2000 665 595 475            
8"single 2000 1495 1110 885 735 630        
10"single 1500 2420 2190 1730 1430 1216        
  2600 2050 1910 1730 1430 1216        
11.5"single 1200 2630 2450 2240 1840 1570        
  2400 2140 1990 1865 1750 1570        
11.5"double 1200 4730 3395 2710 2255 1930 1690      
  2400 3550 3330 2710 2255 1930 1690      
14"single 1500 3390 2600 2120 1780 1535 1350 1210 1090  
  2200 3390 2600 2120 1780 1535 1350 1210 1090  
14"double 1500 5980 4700 3880 3290 2870 2540 2270 2060  
  2200 5980 4700 3880 3290 2870 2540 2270 2060  
14"triple 1500 5350 5120 4850 4650 4110 3630 3260 2945 2690
  2200 4850 4650 4850 4150 4000 3630 3260 2945 2690
Allowable side-load pulls

Determine using the formular L = 126,000 x H.P. x FL / N x D
Where:
L = Effective Side Load (Lbs)
N = Shaft Speed (RPM)
D = Pitch Diameter of pully, chain on gear (in's.)

F = Load Factor  
       1.0 for single chain or gear drive
       1.5 for timing belts
       2.5 for all V belts
       3.0 for flat belts
       2.1 for severe shock drives
       1.8 for large inertia type drives
Note: A support plate for 2 and 3 plate 14" is required in side load applications.

 

Model Selection Guide
Size Model Detail Approx. Weight Lbs. TD Number AP Number
6" single GP1060CP5 Single Plate 6", SAE 5 53 C-106-SP5  
  GP1060CP6 Single Plate 6", SAE 6 53 C-106-SP6  
7" single GP1070CP4 Single Plate 7", SAE 4 55 C-107-SP4  
  GP1070CP5 Single Plate 7", SAE 5 55 C-107-SP5  
8" single GP1070CP3 Single Plate 8", SAE 3 72 C-108-HP3  
  GP1070CP4 Single Plate 8", SAE 4 72 C-108-HP4  
10" single GP1100CP3 Single Plate 10", SAE 3 115 C-110-HP3 S10B3L
  GP1100CP4 Single Plate 10", SAE 4 115 C-110-HP4 S10B4L 
11.5" single GP1110SP1 Single Plate 11", SAE 1 141 SP-111-HP1 S11B1L
  GP1110SP2 Single Plate 11", SAE 2 141 SP-111-HP2 S11B2L
  GP1110SP3 Single Plate 11", SAE 3 141 SP-111-HP3 S11B3L 
11.5" double GP2110SP1 Double Plate 11", SAE 1 175 SP-211-HP1 D11B1L 
  GP2110SP2 Double Plate 11", SAE 2 155 SP-211-HP2 D11B2L
  GP2110SP3 Double Plate 11", SAE 3 155 SP-211-HP3 D11B3L
14" single GP1140SP1 Single Plate 14", SAE 1 260 SP-114-P1 S14B1L 
14" double GP2140SP1 Double Plate 14", SAE 1 330 SP-214-P1 D14B1L 
14" triple GP3140SP0 Triple Plate 14", SAE 0, 80mm pilot 410 SP-314-P0 T14A0L80 
    Triple Plate 14", SAE 0, 100mm pilot 410 SP-314-P0 T14A0L100 
  GP3140SP1 Triple Plate 14", SAE 1, 80mm pilot 410 SP-314-P1 T14A1L80 
    Triple Plate 14", SAE 1,  100mm pilot 410 SP-314-P1 T14A1L100 
           

   South African Distributor, e-mail us at info@powertorque.co.za

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