Warner Electric SFPBC-500, SFPBC-650 - Manual (Page 8)

8 Warner Electric • 800-825-9050 P-202-01 • 819-0482
SF-500 SF-650 Clutch Pin Drive Armature
The illustration drawings, parts lists, and exploded
views for these units can be found beginning on
pages 24 to 29.
A. Installing the Conduit Box
Install the conduit box on the field assembly.
In struc tions are supplied with conduit box.
B. Mounting the Field-and-Rotor
Assembly
Follow the instructions provided for the SFC-500 and
SFC-650 units, Section C, page 3, for mounting the
field-and-rotor assemblies.
C. Assembling the Armature
1. A customer may wish to use the autogap
ac ces so ry to mount a clutch armature to his
own pulley, hub, gear, etc. Follow the illustrat-
ed dimensions to prop er ly adapt these parts
to the armature.
a. The chordal dimension must be held for
all chords between pin holes.
b. Sleeve bearings (Oilite Bronze) with an I.D.
of .376 ±.001 must be provided in the
holes of pulley or hub at the chordal and
bolt
circle dimensions shown be -
low.
(Fig ure 5)
c. The drive pins must be square with the
plane of the mounting surface and magnet
within .006 T.I.R.
2. Once the pulley, gear, etc., has been adapted
to the armature according to the above direc-
tions, the ar ma ture may be mounted to it
using the autogap ac ces so ry.
3. The autogap assembly is a double spring
device which allows for automatic armature
clearance and ad just ment for wear. The small-
er or conical spring pushes the armature from
the rotor face, leaving a gap of about 1/32
inch, while the straight spring au to mat i cal ly
follows up for wear. This combination main-
tains maximum
per for mance efficien-
cy through out the life of the unit.
Figure 4