Grounding, Mounting – Rockwell Automation 1325L DC Motors, Frames C210ATZ - C440ATZ User Manual
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DC Motors
Important: Motors with an overspeed switch must have the overspeed
switch terminals properly connected in the control circuit
to remove armature power when the switch reaches the set
speed.
Grounding
The user is responsible for assuring that the grounding method is in
accordance with the National Electric Code and the applicable local
codes. The ground connection should be a solid and permanent
metallic connection between the ground point, the motor terminal
housing and the motor frame. A ground lead is provided inside the
terminal box.
Mounting
Motors must be mounted on a rigid, solid base or foundation. Poor
base construction may cause resonances in the motor/base assembly
which can result in bearing failure and other motor damage. All hold
down bolts must be the correct grade for the type of mounting and
must be torqued to their recommended value.
Table B
Recommended Torque
Belted Drive
Motor slide bases or rails, when used, must be securely anchored to
the foundation with the proper bolts.
Important: The motor shaft and load shaft must be parallel and the
sheaves aligned. Refer to
Coupled Drive
Important: Flexible couplings must be used between the motor shaft
and the load shaft. Motor shaft and load shaft must be
aligned to values recommended for the specific coupling
before coupling is connected.
Motors will operate successfully mounted on the floor, wall or
ceiling, and with the shaft at any angle from horizontal to vertical.
Special mountings, duty or thrust demands may, however, require a
different bearing system. Hand hole covers can be interchanged as
necessary.
Frame
Hole Diameter
mm (in.)
Bolt Size and
Thread
Recommended Torque
SAE 5
N-m (lb.-ft.)
SAE 8
N-m (lb.-ft.)
C210ATZ 11.2 (0.44)
3/8-16
45-50 (33-37)
64-72 (47-53)
C250ATZ 14.2 (0.56)
1/2-13
113-126 (83-93)
159-179 (117-132)
C280ATZ 14.2 (0.56)
1/2-13
113-126 (83-93)
159-179 (117-132)
C320ATZ 17.5 (0.69)
5/8-11
210-239 (155-176)
271-338 (200-249)
C360ATZ 20.6 (0.81)
3/4-10
372-420 (274-310)
527-597 (389-440)
C400ATZ 26.9 (1.06)
7/8-9
588-659 (434-486)
835-934 (616-689)
C440ATZ 26.9 (1.06)
7/8-9
588-659 (434-486)
835-934 (616-689)