Warner Electric PCBC-500 Clutch_Brake Coupling - Manual (Page 5)

B. Mounting the Magnet and Magnet Hub
The magnet and magnet hub are mounted on the shaft
with a taperlock bushing. All parts must be
clean and free from burrs and chips before
assembling.
1. Place the bushing into the hub and insert the
key. The key is a side-to-side fit and should not
contact the top of the keyway.
2. Insert the locking setscrews loosely into the
bushing and slide the assembly onto the shaft.
3. If the armature has been secured to the shaft
first, then adjust the magnet's position to allow
approximately 1/32-inch between the two
faces. (Figure 12)
4. Secure the magnet's position on the shaft by
alternately tightening each setscrew with a
torque wrench to 175 in.lbs. torque. During the
tightening process the bushing should be
tapped lightly to make certain it seats-in
properly.
C. Assembling the Armature
1. A customer may wish to use the autogap
accessory to mount a clutch armature to his
own pulley, hub, gear, etc. Follow the
illustrated dimensions (Figures 4, 8 and 9) to
properly adapt these parts to the armature.
a. The chordal dimension must be held for all
chords between pin holes.
b. Sleeve bearings (Oilite Bronze)
with an I.D. of .376 ±.001 must be
provided in the holes of pulley or hub at the
chordal and bolt circle dimensions shown in
Figure 4 and 6.
c. The drive pins must be square with plane of
mounting surface and magnet within .006
T.I.R.
2. Once the pulley, gear, etc., has been adapted
to the armature according to the above
directions, the ar ma ture may be mounted to
it using the autogap accessory.
3. The autogap assembly is a double spring
device which allows for automatic armature
clearance and ad just ment for wear. The smaller
or conical spring pushes the armature from the
magnet face, leaving a gap of about 1/32 inch,
while the straight spring automatically follows
up for wear. This combination maintains
maximum performance efficiency throughout
the life of the unit. The assembly procedure for
the autogap accessory is as follows: (Figure 7)
Note: Autogap accessory is shipped
pre-assembled.
Warner Electric • 800-825-9050 819-0484 5