Wrap Spring Clutch Lubrication
Wrap Spring Clutch Lubrication
(OP)
Wrap Spring Clutch Lubrication
My company has been utilizing a wrap spring clutch on our braiding machine for over 20 years. Do to the discontinuation of the original Aeroshell 17 grease we have been forced to change to Aeroshell 33MS grease. The new grease is not performing as well as the old. The 33MS is separating during operation causing the customer to re - lubricate more frequently.
Can anyone provide an alternative for a wrap spring clutch?
Jerry
Reading PA
My company has been utilizing a wrap spring clutch on our braiding machine for over 20 years. Do to the discontinuation of the original Aeroshell 17 grease we have been forced to change to Aeroshell 33MS grease. The new grease is not performing as well as the old. The 33MS is separating during operation causing the customer to re - lubricate more frequently.
Can anyone provide an alternative for a wrap spring clutch?
Jerry
Reading PA





RE: Wrap Spring Clutch Lubrication
RE: Wrap Spring Clutch Lubrication
Our application does not requires aerospace approval.
Shell Lubrication recommended a non MIL spec grease ALVANIA® GREASE CG. Do you have any experience with this grease?
RE: Wrap Spring Clutch Lubrication
Spring wrap clutches are wonderful devices for torque limiting or overrunning. They are compact, simple and provide consistent release characteristics. Unlike other clutch devices like sprags or rollers, they do not experience high local contact stresses between the race and the clutching elements. So theoretically a spring wrap clutch should not require an EP additive grease like Aeroshell 17 or Aeroshell 33MS. You may wish to take a look at something like a wheel bearing grease (Aeroshell 22) that may prove to be more stable.
Here's an excellent technical reference on high-performance spring wrap clutch design:
http:/
Good luck,
Terry
RE: Wrap Spring Clutch Lubrication
RE: Wrap Spring Clutch Lubrication
there is a large difference both in baseoil viscosity and type of base oil used in the two aeroshell greases.
alvania cg as suggested has an even higher baseoil viscosity, that may add to the problems you already have. it is a specialized product for geared couplings - an application where centrifugal forces play a big role in separating oil and thickener. for those applications it is quite a suitable grease but in your case the problem will problably worsen.