Warner Electric Primary Brake Pin Drive Armature PB-825, PB-1000, PB-1225, PB-1525 Motor Brake and Spline Drive MB-825, MB-1000, MB-1225 Pin Drive - Manual (Page 3)

3 Warner Electric • 800-825-9050 P-208 • 819-0367
Primary Brake Normal Duty
Pin Drive Armature
PB-825, PB-1000, PB-1225, PB-1525
A. Installing the Conduit Box
Install the conduit box on the magnet.
Instructions for this procedure can be found
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 (see Figure 1).
2. A machined pilot diameter is provided on the
magnet mounting flange (refer to illustration
drawings) 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
lockwashers. (See Figure 2.)
4. After assembly, the magnet must be concentric
and square within the required tolerances listed
on the illustration drawing. (See Figure 3.)
C. Assembling the Armature and 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 magnet face, leaving a
gap of about 1/32-inch, while the straight spring
automatically follows up for wear. This combination
maintains maximum efficiency throughout the life of
the unit.
Pilot
Diameter
Mounting Surface
Magnet
Figure 1
Figure 2
Figure 3