Warner Electric PCBC-500 Clutch_Brake Coupling - Manual (Page 8)

8 Warner Electric • 800-825-9050 819-0484
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 magnets's position to allow
approximately 1/32-inch between the two faces.
(Figure 5)
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 and Hub
The heavy duty units contain spline drive armatures and
hub. The armatures are shipped with a built-in autogap
spring accessory. This device automatically maintains a
gap of about 1/32-inch between the armature and
magnet faces for the life of the unit.
Follow these instructions to assemble the armature and
splined hub.
Step 1 Place the splined hub on a flat surface. The
extended portion of the hub, where the
setscrew holes are located, should be down.
Step 2 Check the detent ring in the armature
assembly to make sure it is centered evenly
around the spline. This ring moves freely, but it
should be centered for easier assembly of the
hub.
Step 3 Holding the armature with the segmented side
up, press the armature onto the splined hub.
This is most easily done by applying firm
rocking back-and-forth pressure (Figure 5).
Step 4 Push the assembly against the retainer ring.
D. Mounting the Armature-Hub Assembly
1. Slide the armature-hub assembly onto the shaft
until the armature face touches the
magnet face.
2. Move the assembly back to allow a gap of
about 1/16-inch between the two faces.
3. Secure the armature-hub assembly in this
position by tightening the two setscrews in the
hub.
4. Check the assembly by pressing the
armature into contact with the magnet face and
then releasing it. The armature should spring
back about 1/32-inch. This gap will be
automatically maintained the life of the unit.
(Figure 6)
E. Mounting the Brushholder
1. The brushholder is mounted on a bracket which
must be furnished by the customer. The bracket
must be firmly secured to prevent vibration
which could cause im proper contact between
the brushes and collector ring.
2. The distance from the centerline of the shaft to
the top of the brushholder should be 4".
Maintaining this dis tance will assure proper
spring tension on the brushes and maximum
wear follow-up. A detailed dimensional
drawing is included with each brushholder.
Figure 5
1/32-inch
Armature
Magnet
Magnet Hub
Figure 6