Wichita Clutch Fluid Coupling - Manual (Page 12)

C
Mesur-Fil Fluid Couplings
P-1100-WC 1/12 Wichita Clutch 800-964-3262 165
G
Selection Example:
7.5 HP at 1,750 RPM
Normal running torque =
7.5 HP * 5,250 = 22.5 lb.ft.
1,750
Pullout torque is obtained at approximately
85% full motor speed and for NEMA B motors,
this is approximately 200% normal rated
torque.
If the pullout torque is unknown, then assume
200% of normal rating occuring at a speed
of 1,540 RPM, with full motor speed of
1,750 RPM.
Pullout torque = 2 * 22.5 lb.ft. = 45 lb.ft.
Locate the pullout torque against RPM curve
to insure the point is slightly above the drag
torque line.
Locate the normal torque against RPM curve
to insure the point is below the 7% slip line.
Ideally, plot the point between 3% and 5%
slip line.
Slip Curves
Size 15
Maximum speed 2,600 RPM (All configurations)