Warner Electric SFPBC-500, SFPBC-650 - Manual (Page 14)

14 Warner Electric • 800-825-9050 P-202-01 • 819-0482
The illustration drawings, parts lists, and exploded
views for these units can be found beginning on
pages 38, 39 and 42, 43.
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 as sem bly when complete.
A. Aligning the Shafts
Before the clutch/brake coupling can be installed,
the mounting shafts of the motor and reducer or
other hard ware must be aligned to each other.
Follow the
in struc tions provided on page 11 for the spline drive
unit.
B. Installing the Conduit Boxes
Install a conduit box on the brake magnet and on
the clutch field. Instructions are supplied with a con-
duit box.
C. Mounting the Magnet
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. Prop er positioning is very important for
the unit to func tion cor rect ly.
1. A pilot diameter on the mounting surface is
essential to hold the magnet within the
required tolerances. (Figure 2)
2. A machined pilot diameter is provided on the
magnet mounting flange (refer to illustration
drawings page 38 & 42) to aid in the proper
positioning of the mag net.
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
con cen tric i ty and squareness to the shaft.
The unit should be concentric within .010
T.I.R. and square within .006 T.I.R. (Figure 4)
D. Assembling the Armature and Hub
Assemble the armature to the armature hub with the
autogap mounting accessory.
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 ar ma ture from the rotor face, leaving a
gap of about 1/32 inch, while the straight spring
automatically follows up for wear. This combination
maintains maximum performance ef fi cien cy through-
out the life of the unit.
The assembly procedure for the autogap accessory
is as follows. (Figure 5)
SFPBC-500 & SFPBC-650 Clutch/Brake
Coupling Normal Duty Pin Drive Armature
Field
Pilot Diameter
Mounting Surface
Figure 2
Figure 3
Figure 4