When delivered from the factory, friction clutches are normally set to their rated torque settings. This is achieved by tensioning the clutch springs to their maximum compressed length. Compressing the springs beyond these lengths will cause damage to the clutch
This is a general guide on how to correctly set a Bare Co. friction clutch
| Step |
Action |
Specification |
| 1. |
Intial Spring Compression |
Standard Duty (Sliver or Gold Springs) All sizes - Compress fully then back off 2 turns. |
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Blue Torque (Blue Springs) 150mm (6") Clutch - Compress spring to 28mm overall length |
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Blue Torque (Blue Springs) 200mm (8") Clutch - Compress spring to 31mm overall length |
| 2. |
Operate Clutch |
Run machine for approximate 10 minutes |
| 3. |
Check Clutch |
Springs Set Correctly - Warm to touch approx 45C (Like a warm cup of tea) |
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Springs Overtight - Cool to touch, springs too tight, back off each spring 1/4 turn and retest |
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Springs Loose - Hot to touch, over 60C (Excessive slipping) tighten spring 1/4 turn and retest |
| 4 |
Storage |
When clutch is not in use, back off spring nuts completely and remove all tension from springs |
| 5. |
Maintainence |
At 6 Months, back off to polish discs. |
How to free up the clutch after a period of storage:
As outlined in the instructions on most implements, the slip clutch can seize if left for long periods without use, or left outside in the elements. The best way to free up a slip clutch is to loosen all the bolts that hold the spring tension on the friction plates (so they are quite loose), then run the machine with it either jammed so it cannot move, or put into heavy work, to slip the clutch. The clutch only needs to be slipped for 30 seconds to a minute to clean up the surfaces. Alternatively dismantle the clutch and clean it.
Clutch Hub Tightening Torque
| Type |
Specification |
| Clamp Bolt Style 2 x 1/2" Bolts |
75 ft lb (101Nm) |
| Clamp Bolt Style 2 x 5/8" Bolts |
150 ft lb (200Nm) |
| Single Cotter Clamp Bolt |
100 ft lb (135Nm) |
| Retension clamp bolts |
Every 100 Hours |