Mill Torque Overload Couplings
The shear pin cartridge coupling is a Series H Mill type coupling. It is designed to disconnect the driving and driven equipment during torque overload. The purpose of the design is to prevent damage to the equipment- motor, gearbox, pump, etc. from torque overload. FAST’S® Mill Shear pin couplings are used to limit the peak torque to a predetermined safe value. This value is greater than the normal starting torque of the system.
Features & Benefits
- Increased coupling reliability.
- Minimized downtime by enabling quick start-up after shear pin breakage.
- Minimized premature shear pin breakage.
- Decreased coupling rebuilding cost after shear pin breakage.
Additional Data
Series H specifications:
| Coupling Size | Maximum Bore with Standard Key | Rating HP/100 rpm | Torque Rating(lb.-in.x 1000) | Peak Torque Rating(la.-in.x 1000) | Maximum Speed( rpm) | Weight with Solid Hubs(lb.) | Dimension A | Dimension B | Dimension C | Dimension C I | Dimension C W | Dimension E | Dimension O |
| 8 | 10 3/4 | 2230 | 1404 | 2808 | 1750 | 1430 | 23 1/4 | 19 1/2 | 3/8 | 5 9/16 | 10 3/4 | 19 13/14 | 14 |
| 9 | 11 3/4 | 3170 | 1995 | 3990 | 1625 | 2000 | 26 | 21 3/4 | 1/2 | 6 1/4 | 12 | 10 7/8 | 15 1/2 |
| 10 | 13 | 4350 | 2744 | 5488 | 1500 | 2670 | 28 | 24 | 1/2 | 7 1/8 | 13 1/8 | 12 | 17 1/2 |
| 11 | 15 | 5780 | 3645 | 7290 | 1375 | 3520 | 30 1/2 | 26 1/4 | 1/2 | 7 7/8 | 15 1/4 | 13 1/8 | 19 1/2 |
| 12 | 16 1/4 | 7190 | 4532 | 9064 | 1250 | 4450 | 33 | 27 3/4 | 1/2 | 8 1/8 | 15 3/4 | 13 7/8 | 21 1/2 |
| 13 | 17 1/2 | 9030 | 5688 | 11376 | 1125 | 5410 | 35 3/4 | 29 1/2 | 3/4 | 8 7/16 | 16 1/8 | 14 5/8 | 23 |
| 14 | 18 3/4 | 11080 | 6982 | 13964 | 1000 | 6600 | 38 | 31 1/4 | 3/4 | 9 | 17 1/4 | 15 1/2 | 25 |
| 15 | 20 3/4 | 13470 | 8488 | 16976 | 875 | 8040 | 40 1/2 | 33 1/8 | 3/4 | 9 7/16 | 18 1/8 | 16 1/2 | 27 |
| 16 | 22 | 16100 | 10150 | 20300 | 750 | 9680 | 43 | 35 | 1 | 9 7/8 | 18 3/4 | 17 3/8 | 29 |
| 18 | 25 1/4 | 21100 | 13300 | 26600 | 500 | 12500 | 47 1/4 | 36 1/8 | 1 | 10 1/4 | 19 1/2 | 18 | 33 |
| 20 | 27 1/4 | 28800 | 18144 | 36288 | 400 | 17900 | 53 1/2 | 42 3/8 | 1 | 12 3/8 | 23 3/4 | 21 1/8 | 36 1/2 |
| 22 | 30 | 38100 | 24009 | 48018 | 300 | 23300 | 59 | 46 | 1 | 13 3/4 | 26 1/2 | 23 | 40 |
| 24 | 33 1/4 | 42400 | 26699 | 53398 | 200 | 30300 | 64 1/4 | 49 1/2 | 1 | 15 | 29 | 24 3/4 | 44 1/2 |
| 26 | 36 3/4 | 53000 | 33415 | 66830 | 200 | 37700 | 68 1/2 | 53 | 1 | 15 5/8 | 30 1/4 | 26 1/2 | 48 1/2 |
| 28 | 40 | 65900 | 41564 | 83128 | 200 | 45200 | 73 3/4 | 54 1/4 | 1 | 15 7/8 | 30 3/4 | 27 1/8 | 52 1/2 |
| 30 | 43 1/2 | 80300 | 50614 | 101228 | 200 | 52700 | 78 | 55 1/4 | 1 | 15 7/8 | 30 3/4 | 27 5/8 | 56 1/2 |
Fast's specifications:
| Coupling Size | Maximum Bore with Standard Key | Rating HP/100 rpm | Torque Rating(lb.-in.x 1000) | Peak Torque Rating(la.-in.x 1000) | Maximum Speed( rpm) | Weight with Solid Hubs(lb.) | Dimension A | Dimension B | Dimension C | Dimension E |
Dimension O |
| 8 | 8 3/4 | 2230 |
1404 | 2808 | 1750 | 1408 | 23 1/4 | 20 | 3/8 | 19 13/14 | 11 7/8 |
| 9 | 9 3/4 | 3170 | 1995 | 3990 | 1625 | 1898 | 26 | 22 1/4 | 1/2 | 10 7/8 | 13 3/8 |
| 10 | 11 | 4350 | 2744 | 5488 | 1500 | 2548 | 28 | 24 1/2 | 1/2 | 12 | 15 1/4 |
| 11 | 12 | 5780 | 3645 | 7290 | 1375 | 3342 | 30 1/2 | 26 3/4 | 1/2 | 13 1/8 | 16 7/8 |
| 12 | 13 | 7190 | 4532 | 9064 | 1250 | 4194 | 33 | 28 1/4 | 1/2 | 13 7/8 | 18 1/2 |
| 13 | 14 1/4 | 9030 | 5688 | 11376 | 1125 | 5112 | 35 3/4 | 30 | 3/4 | 14 5/8 | 20 |
| 14 | 15 1/4 | 11080 | 6982 | 13964 | 1000 | 6100 | 38 | 31 3/4 | 3/4 | 15 1/2 | 21 3/4 |
| 15 | 17 | 13470 | 8488 | 16976 | 875 | 7650 | 40 1/2 | 33 3/4 | 3/4 | 16 1/2 | 23 1/2 |
| 16 | 18 | 16100 | 10150 | 20300 | 750 | 8965 | 43 | 35 3/4 | 1 | 17 3/8 | 25 |
| 18 | 20 1/2 | 21100 | 13300 | 26600 | 500 | 11770 | 47 1/4 | 37 | 1 | 18 | 28 1/4 |
| 20 | 23 | 28800 | 18144 | 36288 | 400 | 16910 | 53 1/2 | 43 1/4 | 1 | 21 1/8 | 31 7/8 |
| 22 | 26 | 38100 | 24009 | 48018 | 300 | 22370 | 59 | 47 | 1 | 23 | 35 1/4 |
| 24 | 28 | 42400 | 26699 | 53398 | 200 | 28830 | 64 1/4 | 50 1/2 | 1 | 24 3/4 | 38 3/4 |
| 26 | 30 | 53000 | 33415 | 66830 | 200 | 35890 | 68 1/2 | 54 | 1 | 26 1/2 | 42 1/4 |
| 28 | 33 | 65900 | 41564 | 83128 | 200 | 42660 | 73 3/4 | 55 1/4 | 1 | 27 1/8 | 45 3/4 |
| 30 | 36 | 80300 | 50614 | 101228 | 200 | 49780 | 78 | 56 1/4 | 1 | 27 5/8 | 49 1/4 |