Using shaft seals, Using couplings and pulleys – Rockwell Automation MPS-xxxx Stainless Steel Servo Motor User Manual
Page 6
6 MP-Series Stainless Steel Servo Motor with 100 mm to 165 mm Frame Size
Publication MP-IN005F-EN-P - January 2014
Using Shaft Seals
An additional seal is required on the motor shaft near the motor front bearing, if the shaft is
exposed to fluids or significant amounts of fine dust. This includes lubricating oil from a
gearbox. An IP66, IP67, or IP69K rating for the motor requires the use of a shaft seal and
environmentally sealed connectors/cables. The additional seal is not recommended in
applications where the motor shaft area is free of liquids or fine dust, and a lower rating is
sufficient:
•
Refer to
for a brief description of the IP rating for these
MP-Series motors.
•
Refer to
to find the catalog numbers of seal kits available for
your motor.
•
Refer to Kinetix® Motion Accessories Specifications, publication
find
environmentally sealed connectors and cables compatible with the MP-Series motors.
Using Couplings and Pulleys
Mechanical connections to the motor shaft, such as couplings and pulleys, require a torsionally
rigid coupling or a reinforced timing belt. The high dynamic performance of servo motors can
cause couplings, pulleys, or belts to loosen or slip over time. A loose or slipping connection can
cause system instability and damage the motor shaft. All connections between the system and the
servo motor shaft must be rigid to achieve acceptable response from the system. Periodically
inspect connections to verify their rigidity.
When mounting couplings or pulleys to the motor shaft, be sure that the connections are
properly aligned and that axial and radial loads are within the specifications of the motor. Refer
to
for guidelines to achieve 20,000 hours of motor bearing life.
ATTENTION: Damage can occur to the motor bearings and the feedback device if sharp impact to the shaft is
applied during installation of couplings and pulleys. Damage to the feedback device can result by applying
leverage from the motor mounting face to remove devices mounted on the motor shaft.
Do not strike the shaft, couplings, or pulleys with tools during installation or removal. Use a wheel puller
applying pressure from the user end of the shaft to remove any friction-fit or stuck device from the motor shaft.