Motor Radial Load Force Ratings
Motors are capable of carrying an axial load in most applications. The following table provides
guidelines for 20,000 hour bearing life with a specified radial load applied to the center of the shaft.
Please consult with Rockwell Automation regarding loads, operating speeds and bearing life in your
particular application to ensure the proper selection of motors.
Brake Motor Application Guidelines
The brakes offered as options on these servo motors are holding brakes. They are designed to hold
the motor shaft at 0 rpm for up to the rated brake holding torque. The brakes are spring-set type, and
release when voltage is applied to the brake coil.
The brakes are not designed for stopping rotation of the motor shaft. Servo drive inputs should be
used to stop motor shaft rotation. The recommended method of stopping motor shaft rotation is to
command the servo drive to decelerate the motor to 0 rpm, and engage the brake after the servo drive
has decelerated the motor to 0 rpm.
If system main power fails, the brakes can withstand use as stopping brakes. However, use of the
brakes as stopping brakes creates rotational mechanical backlash that is potentially damaging to the
system, increases brake pad wear and reduces brake life. The brakes are not designed nor are they
intended to be used as a safety device.
A separate power source is required to disengage the brake. This power source may be controlled by
the servo motor controls, in addition to manual operator controls.
Brake Specifications
STANDARD RADIAL LOAD FORCE RATINGS
500 rpm 1000 rpm 2000 rpm 3000 rpm 4000 rpm
MOTOR lb (kg) lb (kg) lb (kg) lb (kg) lb (kg)
F-4030 76 (34) 60 (27) 47 (21) 41 (19) 38 (17)
F-4050 88 (40) 69 (31) 55 (25) 48 (22) 44 (20)
F-4075 92 (42) 73 (33) 58 (26) 51 (23) 46 (21)
F-6100 159 (72) 126 (57) 100 (45) 87 (39)
F-6200 172 (78) 136 (62) 108 (49) 94 (43)
F-6300 183 (83) 145 (66) 115 (52) 101 (46)
NOTE: When motor shaft has no radial load, axial load rating = 100% of radial load rating above.
When motor shaft has both a radial load and an axial load, axial load rating = 44% of radial load rating above.
BRAKE DATA
MOTOR MAX. BACKLASH HOLDING TORQUE COIL CURRENT
SERIES (Brake Engaged) (lb/in) (Nm) at 24 VDC at 90 VDC
F-4000 44 minutes 90 10.2 0.69 ADC 0.20 ADC
F-6000 29 minutes 275 31.1 1.30 ADC 0.48 ADC
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Axial load force
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