Rockwell Automation Publication MM-IN001B-EN-P - February 2022
41
Kinetix MMA Asynchronous Main Motors Installation Instructions
• N = Maximum speed (rpm) at which loads in the table can be applied
• Fr = Maximum radial load (independent of axial load)
• Far = Maximum axial load when radial load is also present
• Fa = Maximum axial load when no radial load is present
MMA-
B160
xxx
N=5300
Fr=2240 N
Far=450 N
Fa=990 N
N=4800
Fr=3640 N
Far=280 N
Fa=610 N
—
N=7500
Fr=1040 N
Far=230 N
Fa=500 N
—
N=7500
Fr=1040 N
Far=230 N
Fa=500 N
—
N=7500
Fr=1040 N
Far=230 N
Fa=500 N
MMA-
B180
xxx
N=4300
Fr=3580 N
Far=500 N
Fa=1100 N
N=3800
Fr=5320 N
Far=300 N
Fa=660 N
N=6300
Fr=1740 N
Far=250 N
Fa=550 N
N=6300
Fr=1740 N
Far=250 N
Fa=550 N
N=6300
Fr=1740 N
Far=250 N
Fa=550 N
MMA-
B225
xxx
—
N=3400
Fr=4000 N
Far=750 N
Fa=1650 N
—
N=3400
Fr=4000 N
Far=750 N
Fa=1650 N
—
N=3400
Fr=4000 N
Far=750 N
Fa=1650 N
N=2800
Fr=6860 N
Far=450 N
Fa=990 N
N=4800
Fr=2060 N
Far=380 N
Fa=830 N
N=4800
Fr=2060 N
Far=380 N
Fa=830 N
N=4800
Fr=2060 N
Far=380 N
Fa=830 N
(1)
These are the published bearing values. See
for the n
max
allowable and n
max
recommended motor speed.
(2)
Multiply the Fr value by value in
based on the direction of the force.
Table 39 - Radial Force (Fr) Derating Factor for Pulley-Driven or Foot-Mounted Motors with Roller Bearings
Motor Cat. No.
(1)
(1)
Only for bearing catalog numbers J, K, and L. Multiply the Fr value by value in
or
based on the direction of the force.
Bottom
Top
Sides
MMA-B080
xxx
0.8
0.65
0.75
MMA-B100
xxx
0.8
0.65
0.75
MMA-B132
xxx
0.8
0.65
0.75
MMA-B160
xxx
0.8
0.65
0.75
MMA-B180
xxx
1.0
0.75
0.8
MMA-B225
xxx
1.0
0.75
0.8
Table 38 - Shaft Load Specifications for All Bearing Options at Maximum Bearing Speed (When Load is Applied at the Midpoint of the Shaft Extension) (Continued)
(1)
Motor
Cat. No.
Deep Groove Ball Bearings
Roller Bearing
High Speed Bearing
DE
: S
tan
da
rd
ND
E:
S
ta
nd
ar
d
DE
: Re
gr
ea
sa
bl
e
ND
E:
S
ta
nd
ar
d
DE
: S
tan
da
rd
ND
E:
S
ta
nd
ar
d,
B
ru
sh
DE
: Re
gr
ea
sa
bl
e
ND
E:
S
ta
nd
ar
d,
B
ru
sh
DE
: S
tan
da
rd
NDE: B
all
Be
ar
ing, Insulated
DE
: Re
gr
ea
sa
bl
e
NDE: B
all
Be
ar
ing, Insulated
DE
: Re
gr
ea
sa
bl
e
N
D
E:
Stan
dard Ba
ll B
ear
ing
DE
: Re
gr
ea
sa
bl
e
N
D
E:
Stan
dard Ba
ll B
ear
ing, Br
ush
DE
: Re
gr
ea
sa
bl
e
NDE: B
all
Be
ar
ing, Insulated
D
E: High S
peed
NDE: High Speed
D
E: High S
peed
, Regr
easab
le
NDE: High
Speed, Regr
ea
sable
D
E: High S
peed
NDE: High Speed, Brush
D
E: High S
peed
, Regr
easab
le
N
D
E:
Hig
h Sp
eed, B
rush, R
egreasa
ble
D
E: High S
peed
NDE: Hybr
id C
er
amic
Insulated
D
E: High S
peed
Regr
easab
le
NDE: Hybr
id C
er
amic
Insulated
A
B
C
D
E
F
J
(2)
K
(2)
L
(2)
M
N
P
Q
R
S
Axial load force that is
applied to the center of
the shaft.
Radial load force that is applied at the
midpoint of the shaft extension.
TOP
BOTTOM
SIDE
SIDE
additional information.
The direction of the force (top, bottom,
or side) is used to calculate the radial
force on the shaft when roller bearings
are used in conjunction with a pulley-
drive or foot-mounted motor. See the
image to better understand in which
direction the force is felt.
