The original design included shear bolts. The operators quickly figured out that a heavy bolt reduced the chances of a shut down. However, when a significant load came along, they sheared the shaft instead.
Next, they tried an overload clutch. After a year, due to the nasty environment, the unit had corroded and seized. Again, they sheared the shaft.
SOLUTIONWe have done a lot of work in this area and have come across many similar situations. We had been involved in the development of a simple stainless steel design with excellent sealing.
We reviewed their torque and speed requirements and examined their sprocket mount. We were able to come up with a direct drop-in. It turned out that installation and removal was even easier than expected, adding another benefit.
Give us a call if you cannot solve your overload problems.