Warner Electric SFC-1525 - Manual (Page 5)

5 Warner Electric • 800-825-9050 P-207 • 819-0516
E. Mounting the Armature-Hub Assembly
1. Insert the bushing into the retainer ring side of the
splined hub. The clearance holes in the bushing
flange should line up with the tapped holes in the
splined hub. (Figure 7)
2. Slide the complete assembly on the shaft and place
it in contact with the rotor.
3. Tighten the bushing capscrews, taking a few turns
at a time on each capscrew. As the capscrews are
tight ened, the armature will back away slightly from
the rotor. There should be a clearance of 1/16"
be tween the ar ma ture and rotor when the
capscrews are com plete ly tight.
4. When the assembly has been secured on the shaft,
push the armature against the rotor face. When the
ar ma ture is released, it will spring back about 1/32".
(Fig ure 8)
Once this gap is set, it will be automatically maintained
for the life of the unit.
Figure 7
1/32-inch Gap
Armature Rotor
Figure 8
Torque Tabs
Clutches
Many Warner Electric clutch assemblies have a bearing
mounted stationery field. By design the bearing
main tains its proper position between the field and rotor
mak ing it easy for the customer to mount the field-rotor
as sem bly. However, the bearing has a slight drag which
tends to make the field rotate with the rotor if not
re strained. And, since the field has lead wires attached,
it must be restrained to prevent rotation and pulling of
these wires. To counteract this rotational force, the field
has a “torque tab” to which the customer must attach
an ap pro pri ate anti-rotational restraint.
A few hints regarding proper torque tab restraints are in
order. First and foremost, it is important to recognize that
the force to be overcome is very small and the tab
should not be restrained any manner which will preload
the bearing. For example, if the clutch is mounted with
the back of the field adjacent to a rigid machine member
the customer should not attach a capscrew tightly
between the tab and the machine member. This may
pull the tab back against the rigid member as shown in
Figure 1 and preload the bearing. The recommended
methods are il lus trat ed in Illustrations 2, 3, and 4. The
method selected is primarily a matter of customer
preference or con ve nience.
Illustration 1
Rigid Member
Illustration 2
Rigid Member
Straddling Tab
Illustration 3
Pin In Hole Loosely
Illustration 4
Flexible Strap