Warner Electric PCBC-500 Clutch_Brake Coupling - Manual (Page 16)

16 Warner Electric • 800-825-9050 819-0484
PCBC-500 Clutch/Brake Coupling
Normal Duty Pin Drive Armature (Figure 2)
The illustration drawing, parts list, and exploded view for
this unit can be found on pages 30 and 31.
A. Installing the Conduit Box
Install the conduit box on the magnet. Instructions for
this procedure can be found on page 20.
B. Mounting the Magnet
The brake half of the clutch/brake unit is usually installed
first; however, in some cases it may be
necessary to start with the clutch portion of the unit
to assure a proper assembly when complete.
The brake magnet is mounted to a stationary machine
member by a flange. Extreme care must be taken in
se lect ing the location for the mounting of the magnet.
Proper positioning is very important for the unit to
function correctly.
1. A pilot diameter on the mounting surface is
essential to hold the magnet within the required
tolerances. (Figure 1) Also see “Customer Shall
Maintain” on page 34.
2. A machined pilot diameter is provided on the
magnet mounting flange (refer to illustration
drawings pages 30 and 31) to aid in the proper
positioning of the magnet.
Field
Pilot Diameter
Mounting Surface
Figure 1
3. Once the mounting surface has been
prepared the magnet is bolted in place with
capscrews and lockwashers. (Figure 3)
4. Use a dial indicator to check the unit for
concentricity and squareness to the shaft.
The unit should be concentric within .010 T.I.R.
and square within .006 T.I.R. (Figure 4)
C. Assembling the Hub and Armatures
Assemble the armatures to the armature hub with the
auto gap mounting accessory. The hub is reversible so
that the taperlock bushing may be inserted from either
side as required.
The autogap assembly is a double spring device which
allows for automatic armature clearance and adjustment
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 per-
formance efficiency throughout the life of the unit.
Figure 3
Figure 4
Figure 2 - PCBC Clutch/Brake Coupling