Warner Electric PB-650 Pin Drive - Manual (Page 3)

3 Warner Electric • 800-825-9050 819-0485
PB-500 Primary Brake Normal
Duty Pin Drive Armature
Installation Instructions
A. Installing the Conduit Box
Please follow instructions supplied with conduit
box.
B. Mounting the Magnet
The brake magnet is mounted to a stationary
machine member by a flange. Extreme care
must be taken in selecting 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)
2. A machined pilot diameter is provided on the
magnet mounting flange (refer to illustrations)
to aid in the proper positioning of the magnet.
3. Once the mounting surface has been
prepared, the magnet is bolted in place with
capscrews and lock-washers. (Figure 2)
Mounting Surface
Pilot diameter
Magnet
Figure 1
Figure 2
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 3)
C. Assembling the Armature Hub
Assemble the armature to the armature hub with
the autogap mounting accessory. Refer to Figure
4. The hub is reversible. The side on which the
armature is mounted will depend on the direction
in which the taperlock bushing must enter.
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 rotor face,
leaving the 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.
Figure 3