Warner Electric Electro-Clutch EC-375, EC-475, EC-650, EC-825, EC-1000, EC-1225 - Manual (Page 4)

4 Warner Electric • 800-825-9050 819-0041 • P-210
Torque Tabs
Many Warner Electric clutch assemblies have
a bearing mounted stationary field. By design
the bearing maintains its proper position
between the field and rotor making it easy for
the customer to mount the field-rotor assembly.
However, the bearing has a slight drag which
tends to make the field rotate with the rotor if
not restrained. Since the field has lead wires
attached, it must be restrained to prevent rota-
tion and pulling of these wires. To counteract
this rotation force, the field has a "torque tab" to
which the customer must attach an appropriate
anti-rotational restraint.
Figure 4
Rigid Member
Figure 5
Rigid Member
with Slot Straddling Tab
Figure 6
Pin In Hole Loosely
Figure 7
Flexible Strap
A few hints regarding proper torque tab
restraints are in order. First and foremost, it is
important to recognize that the force to be over-
come is very small and the tab should not be
restrained in 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 4 and preload the bearing. The recom-
mended methods are illustrated in Figures 5, 6,
and 7. The method selected is primarily a matter
of customer preference or convenience.