Wichita Clutch Fluid Coupling - Manual (Page 7)

Mesur-Fil Fluid Couplings
160 Wichita Clutch 800-964-3262 P-1100-WC 1/12
1200 RPM 1800 RPM
HP Cplg. Fill % Cplg. Fill % HP KW
Size No. Slip Size No. Slip
1/2 7.0 12 6 7.0 8 3 1/2 0.38
3/4 9.4 8 3 7.0 8 4 3/4 0.56
1 9.4 8 3 7.0 9 4 1 0.75
1 1/2 9.4 8-1/2 3 7.0 11 5 1-1/2 1.1
2 9.4 9 4 7.0• 12 6 2 1.5
3 9.4 10 5 9.4 8 2 3 2.2
5 12.4 7 3 9.4 8-1/2 3 5 3.8
7 1/2 12.4 8 2-1/2 9.4 9 3 7-1/2 5.6
10 12.4 9 4 9.4 10 4-1/2 10 7.5
15 12.4 11 5 12.4 7 3 15 11.3
20 15 2 3-1/2 12.4 8 2-1/2 20 15.0
25 15 2 5 12.4 8-1/2 3 25 18.8
30 15 1 4 1/2 12.4 9 3-1/2 30 22.5
40 15 0 5 1/2 12.4 10 4 40 30.0
50 17 1-1/2 4 12.4 11 5 50 37.5
60 17 1 4 15* 3 3 60 45.0
75 19 2 4-1/2 15 2 3-1/2 75 56.3
100 21 1/2 3-1/2 15 0 3-3/4 100 75
125 21 1-1/2 4-1/2 17 2 3 125 94
150 24 2 2-1/2 17+ 2 4 150 113
200 24 2 3-1/2 19+* 2 3-1/2 200 135
250 24 1 4 19+* or 21* 0 or 2 3-1/2 or 2 250 188
300 27 1 21+* 2 3 300 225
350 27 0 21+* 1 3 350 263
400 29 1 24 3 400 300
450 29 1 24 2 450 338
500 29 1 24 2 500 375
600 29 0 27 2 600 450
700 29 0 27 1 700 525
800 29 0 27 0 800 600
900 34 1
1,000 34 1
1,250 34 0
1,500 34 0
Fill Levels (NEMA B Motors)
The Quick Selection Chart (see Figure
8) provides the correct size coupling
and fill level for any standard NEMA B
motor within the Mesur-Fil range. It
also provides the slip rate that can be
anticipated at normal operating
speed. Having the correct amount of
oil in the coupling is extremely critical
to ensure safe and proper op er a tion.
Figure 9 shows the effects of either
too much or too little fluid. With an
optimum amount of fluid, the
breakdown point of the motor with
the 100% slip line of the coupling
provide the best com bi na tion of soft
start with slip rate at normal speed.
With too much fluid (red area), the
slip rate is lower and the start is
harder. With too little fluid (blue area),
the start will be softer but the slip rate
will be much higher. This can cause
heat dis si pa tion problems, and, in
extreme situations, the coupling may
completely fail to move the load.
A choice of fluids is also avail able. In
a normal environment, petroleum oil
is the best fluid to use. For
hazardous con di tions such as those
encountering dust, paint spray, etc., a
special fire-resistant fluid may be
required.
Figure 8 Quick Selection Chart
Figure 9 Coupling Fill Effect
* In these applications, coupling will develop
stall torque somewhat higher than motor
breakdown torque.
+ In these applications, frequent starts or
overloads may overheat coupling. Use only for
loads at or below rated torque of motor with
infrequent starts.
• Caution! 7% or higher slips may cause over -
heat ing if coupling is cycled too rapidly.
For minimum operating temperature below -
10° F, consult the factory.
Note: For vertical mounting order unit with both
the standard and optional fill plugs on both sides
of the unit.
Delay chamber is recommended
for the following applications:
Overland conveyors
Blowers/Fans
Mixers
Crushers
Excavators
Mills
Large inertia drives
Centrifuges
Selection and Sizing