A bearing mounted clutch/brake refers to a unit that has the bearing mounted in the field/rotor assembly.

Step 1

Slide the clutch onto the shaft, (for a two-piece clutch, slide both pieces on one at a time) making sure that the key is in the proper location. Do not force the clutch onto the shaft because if the key is off slightly, damage could occur to the key or to the bore of the clutch. The clutch should be slid onto the shaft until the bearing inner race on the clutch contacts a step, washer or other drive pulley. In all cases, the mounting surfaces of these components need to be parallel to each other within .003". If these surfaces are not parallel, the clutch could become cocked on the shaft. (This would show up as a wobbling pulley.) The contact of these components, to the bearing inner race, can extend beyond the inner race because the seal is recessed. (If you are using a washer, make sure it is not cupped otherwise this cupping could dig into the bearing seal.) Make sure to check the chamfer on the ground drive pulley, washer or clutch so they do not interfere with the radius on the step in the engine crankshaft. On some of our clutches, the bearing is kept on the inner sleeve via a snap ring, (pulley side). With this design, the rotor would then contact the appropriate step in the shaft.

Step 2

A center bolt and washer (customer supplied) is then placed into the end of the tapped shaft and then tightened down. The washer should be .250" in thickness.

Bolt tightening torque will vary depending upon the bolt used in the application. This can be anywhere from 20 \uffff 50 ft. lbs. of tightening torque depending upon the bolt. If vibration is heavy an adhesive may be required to prevent the bolt from coming loose. The washer should contact the inner race of the bearing. It can extend beyond the inner race as long as it does not contact the outer race.

Step 3

If the torque restraining piece has not been installed, please do so at this time. Whichever method you choose to restrict rotation of the backing plate, please make sure that there is 1/16" of both axial and radial movement allowed in the backing plate of the clutch/brake. Without this movement, the backing plate can cock the field bearing which would cause a premature field bearing failure. Whether you choose to use the slot that is already manufactured in the clutch or other method, please make sure that your hardware can hold the braking torque of the brake, which can be anywhere from 2.2 to 20 pounds depending upon clutch size.

Step 4

This step is for two piece designs only. Place the springs on to the studs. The brake shroud is then placed on the studs and the nuts are loosely tightened on the studs.