20
Rockwell Automation Publication MM-IN001B-EN-P - February 2022
Kinetix MMA Asynchronous Main Motors Installation Instructions
Mounting with Supports or Flanges
The mount must be sturdy and solid to help prevent motor vibration and flexing. The flange is located on the forward part of the motor (drive-end side) and is provided with
a pilot diameter (rabbit fit) to allow easy access. Screw/bolt holes are provided for attaching the motor to the support. For Kinetix MMA main motors, it is necessary to
provide a support on the rear side of the motor to avoid flexion or deformation of the flange/shaft. See
for additional information.
Flange-mounted motors are not acceptable in all applications because of their weight and length. See
for additional information.
•
Use the mounting position B35 that has a support under the motor and is flange mounted.
•
Use the mounting position B5 + support, as shown in
The motor support should contain springs or compressible rubber components and should support 50% of the motor weight. Anything that supports less than 50% of the
motor weight causes undue stress on the motor flange.
Install the Motor
Perform these steps to install the motor. Follow the necessary regulations and direction for the mounting orientation being used.
Table 13 - Flange Dimension Mounting Options Summary
Standard Size
Increased Size
Reduced Size
Dimension
M
S
N
T
AC
P
M
S
N
T
AC
P
M
S
N
T
AC
P
Tolerance
±0.1
±0.1
j6
±0.1
±0.5
±0.5
±0.1
±0.1
j6
±0.1
±0.5
±0.5
±0.1
±0.1
j6
±0.1
±0.5
±0.5
Motor Cat. No.
Bolt
Cir
cle Diame
ter
Moun
ti
ng Hole
D
iame
ter
Pilot D
iam
eter
Pilot Thi
cknes
s
Flange Wi
dth (S
Q)
Max Flange
Outer Diame
ter
Bolt
Cir
cle Diame
ter
Moun
ti
ng Hole
D
iame
ter
Pilot D
iam
eter
Pilot Thi
cknes
s
Flange Wi
dth (S
Q)
Max Flange
Outer Diame
ter
Bolt
Cir
cle Diame
ter
Moun
ti
ng Hole
D
iame
ter
Pilot D
iam
eter
Pilot Thi
cknes
s
Flange Wi
dth (S
Q)
Max Flange
Outer Diame
ter
MMA-B080
xxx
165
12
130
3.5
158
200
215
14.5
180
4
210
250
—
MMA-B100
xxx
215
14.5
180
4
198
250
265
14.5
230
4
250
300
MMA-B132
xxx
300
18.5
250
5
262
350
—
265
14.5
230
4
262
350
MMA-B160
xxx
350
18.5
300
5
318
400
300
18.5
250
5
318
400
MMA-B180
xxx
350
19
300
5
360
400
—
MMA-B225
xxx
400
19
350
5
450
490
ATTENTION:
For foot-mounted motors, the mounting procedure requires that the access panel for the rear
mounting feet be removed and then reinstalled.
ATTENTION:
Some motors cannot be flange mount only (see
and
). The length of the motor and
the relative weight determines the structure flexion, vibrations, and/or noise. For this reason, these motors must
use B5 plus support.
ATTENTION:
If less than 50% of the load is supported, the motor can experience excessive flexion and vibration,
which will damage the motor. That creates loading on the motor flange and shaft with respect to the bearing
housing.
ATTENTION:
Do not strike the shaft, couplings, or pulleys with tools during installation or removal. Damage may
occur to the motor bearings and the feedback device if sharp impact to the shaft is applied during installation of
couplings and pulleys. Failure to observe these procedures could result in damage to the motor and its
components.
