Warner Electric SFPBC-500, SFPBC-650 - Manual (Page 13)

13 Warner Electric • 800-825-9050 P-202-01 • 819-0482
releasing it. The armature should spring back
about 1/32''. This gap will be automatically
maintained for the life of the unit.
F. Mounting the Field-and-Rotor Assembly
1. Insert a key into the keyway in the bore of the
rotor, and slide the assembly onto the shaft.
2. Adjust the rotor’s position on the shaft to
allow ap prox i mate ly 1/32'' gap between the
faces of the rotor and armature. (Figure 8)
3. Secure the assembly on the shaft by
alternately tight en ing the two setscrews.
4. Set the autogap by pressing the face of the
armature into the rotor face. When the
armature is released, it will spring back about
1/32''. Once this 1/32'' gap is set, it will be
automatically maintained throughout the life of
the unit.
5. A tab or torque arm is provided to prevent the
field from rotating with the shaft. Insert either
a pin in the U-slot or a fork around the torque
arm to prevent this rotation. Under no
circumstances, however, should the field be
so tightly restrained that it preloads the
bearing. For more information on torque tabs,
see page 18.
1/32 inch Gap
Armature
Rotor
Figure 8