STEELFLEX® - Rexnord

F A L K
Slip Torque Performance Charts
The following charts are for LT, T41, T41-2, T44 and T44-2
couplings or clutches. The coupling or clutch slip torque setting
and operating speed determine the length of time a coupling or
clutch can slip without exceeding its thermal capacity. An
automatic cutout switch (see Page 21) is REQUIRED on
applications as indicated in the upper right of the charts
(Footnote 1) and is recommended on applications where
“minutes of slip and non-slip” are exceeded.
CAUTION: Thermal conditions in the slip torque performance
charts apply only when the controlled torque hub is mounted on
the driving shaft. When the controlled torque hub is mounted on
the driven shaft reduce the slip time by 50%.
During slip, heat is generated at the friction lining surfaces. The
following charts specify the thermal capacities. When the torque
(slip torque at the slip speed — not motor horsepower) being
SLIP TORQUE SETTING (Nm)
100
8
6
5
4
3
2
10
8
6
5
4
3
2
38
SIZES 2LT and 20T41 & T44
APPLIES ONLY WHEN T41 OR T44
HUB IS MOUNTED ON DRIVING SHAFT
Continuous slip
Permitted
3
2
dissipated during a slip period exceeds the thermal capacity of
the coupling or clutch, the following conditions will result:
1. Lining wear will change the coefficient of friction and slip
torque setting.
2. Excessive sleeve bearing wear.
3. Warping of controlled torque hub flange and drive
plate flange.
4. Heavy smoke and possibly fire.
5. Complete coupling or clutch failure.
The limits specified in these charts must be adhered to for proper
operation of controlled torque couplings or clutches in overload
systems. Refer to Falk all applications requiring operation beyond
the coupling or clutch thermal capacity.
SLIP TORQUE SETTING (Nm)
100
8
6
5
4
3
2
3
2
99.4
10
8
6 5.65
5
4
Continuous slip
Permitted
SIZE 30T41 & T44
APPLIES ONLY WHEN T41 OR T44
HUB IS MOUNTED ON DRIVING SHAFT
3
2
1
1
10 2 3 4 5 6 100 2 3 4 5 6 1000 2 3 4 5 6 10000
SPEED (RPM)
- 17 seconds slip permitted if followed by 6 minutes non-slip
- 34 seconds slip permitted if followed by 6 minutes non-slip
1
10 2 3 4 5 6 100 2 3 4 5 6 1000 2 3 4 5 6 10000
SPEED (RPM)
- Automatic cutout switch required
- 20 seconds slip permitted if followed by 7 minutes non-slip
- 40 seconds slip permitted if followed by 7 minutes non-slip
SIZE 40T41 & T44
SIZE 50T41 & T44
SLIP TORQUE SETTING (Nm)
1000
8
6
4
2
100
8
6
4
2
10
8
6
4
167
6.78
APPLIES ONLY WHEN T41 OR T44
HUB IS MOUNTED ON DRIVING SHAFT
1
Continuous slip
Permitted
3
2
SLIP TORQUE SETTING (Nm)
1000
8
6
4
2
100
8
6
4
2
10
8
6
4
271
9.04
APPLIES ONLY WHEN T41 OR T44
HUB IS MOUNTED ON DRIVING SHAFT
Continuous slip
Permitted
3
2
1
2
2
1
10 2 3 4 5 6 100 2 3 4 5 6 1000 2 3 4 5 6 10000
SPEED (RPM)
- Automatic cutout switch required
- 23 seconds slip permitted if followed by 7.5 minutes non-slip
- 45 seconds slip permitted if followed by 7.5 minutes non-slip
1
10 2 3 4 5 6 100 2 3 4 5 6 1000 2 3 4 5 6 10000
SPEED (RPM)
- Automatic cutout switch required
- 27 seconds slip permitted if followed by 9 minutes non-slip
- 54 seconds slip permitted if followed by 9 minutes non-slip
22 (M421-110) © The Falk Corporation, 2003