Oriental motor BLM Series - Load Installation and Shaft Specifications; Round Shaft Type Installation; Permissible Loads; Combination Type Gearhead Load Limits

5
z
Round shaft type
Secure the motor with hexagonal socket head screws (not included) through
the four mounting holes provided.
Do not leave a gap between the motor and mounting plate.
Applicable mounting screw
Model
Screw
size
Tightening torque

Hexagonal socket
head screw
(not included)
BLM230
BLM260
M4
1.8 N·m (15.9 lb-in)
[1.4 N·m (12.3 lb-in)]
BLM5120
BLM5200
BLM5300
BLM5400
M8
15.5 N·m (137 lb-in)
[12.0 N·m (106 lb-in)]

The brackets [ ] indicate the value for
stainless steel.
Install the motor to a mounting plate of the following size or larger, so that the
motor case temperature will not exceed 90 °C (194 °F).
Model
Size of mounting plate
[mm (in.)]
Thickness
[mm (in.)]
Material
BLM230
115×115 (4.53×4.53)
5 (0.20)
Aluminum alloy
BLM260
135×135 (5.31×5.31)
BLM5120
165×165 (6.50×6.50)
BLM5200
200×200 (7.87×7.87)
BLM5300
BLM5400
250×250 (9.84×9.84) 6 (0.24)
Note
Do not install the motor to the mounting hole diagonally or
assemble the motor forcibly. Doing so may cause damage to the
ange pilot section, thereby resulting in damage to the motor.
■
Installing a load
When installing a load on the motor or gearhead, pay attention to the following
points.

Align the centerline of the motor output shaft or gearhead output shaft with
the centerline of the load.

A key slot is provided on the output shaft of each combination type-parallel
shaft gearhead. Form a key slot on the load side and secure the load using the
parallel key.
Note

When coupling the motor or gearhead with a load, pay attention
to centering, belt tension, parallelism of pulleys, etc. Also, rmly
secure the tightening screws of the coupling or pulleys.

When installing a load, do not damage the motor output shaft
(gearhead output shaft) or bearing. Forcing in the load by driving
it with a hammer, etc., may break the bearing. Do not apply any
excessive force to the output shaft.

Do not modify or machine the output shaft of the motor or
gearhead. The bearing may be damaged or the motor or gearhead
may break.
When using the output shaft end tapped hole of a gearhead
(
GFV4G
,
GFV5G
,
GFV6G
only)
Use a tapped hole provided at the end of the output shaft as an auxiliary
means for preventing the transfer mechanism from disengaging.
Gearhead
model
Screw
size
Eective depth
of screw
Fix
ed screw
Screw
Spacer
Transmission
parts
GFV4G
M5
10 mm
(0.39 in.)
GFV5G
GFV6G
M6
12 mm
(0.47 in.)
■
Permissible radial load and permissible axial load
The radial load and the axial load on the output shaft of the motor or gearhead
must be kept under the permissible values listed below.
Note
Failure due to fatigue may occur when the bearings and output
shaft of the motor or gearhead are subject to repeated loading by a
radial or axial load that is in excess of the permissible limit.
10 mm (0.39 in.)
20 mm (0.79 in.)
Distance from output shaft end
Axial load
Radial load
z
Combination type-parallel shaft gearhead
GFV
gearhead
Model
Permissible radial load [N (lb.)]

Distance from output shaft end
of the gearhead
Permissible
axial load
[N (lb.)]
Gear ratio
10 mm
(0.39 in.)
20 mm
(0.79 in.)
BLM230
5
100 (22)
[90 (20)]
150 (33)
[110 (24)]
40 (9.0)
10
to
20
150 (33)
[130 (29)]
200 (45)
[170 (38)]
30
to
200
200 (45)
[180 (40)]
300 (67)
[230 (51)]
BLM460S
5
200 (45)
[180 (40)]
250 (56)
[220 (49)]
100 (22)
10
to
20
300 (67)
[270 (60)]
350 (78)
[330 (74)]
30
to
200
450 (101)
[420 (94)]
550 (123)
[500 (112)]
BLM5120
5
300 (67)
[230 (51)]
400 (90)
[300 (67)]
150 (33)
10
to
20
400 (90)
[370 (83)]
500 (112)
[430 (96)]
30
to
200
500 (112)
[450 (101)]
650 (146)
[550 (123)]
BLM6200S
BLM6300S

BLM6400S

5
to
20
550 (123)
[500 (112)]
800 (180)
[700 (157)]
200 (45)
30
,
50
1000 (220)
[900 (200)]
1250 (280)
[1100 (240)]
300 (67)
100
,
200
1400 (310)
[1200 (270)]
1700 (380)
[1400 (310)]
400 (90)

The values assume a rated speed of 3000 r/min or below. The values in [ ] are
based on a rated speed of 4000 r/min.

The gear ratio of the
BLM6300S
is 5:1 to 100:1.

The gear ratio of the
BLM6400S
is 5:1 to 50:1.
z
Round shaft type
Model
Permissible radial load [N (lb.)]
Distance from output shaft end of
the motor
Permissible axial load
[N (lb.)]
10 mm
(0.39 in.)
20 mm
(0.79 in.)
BLM230
BLM260
80 (18) 100 (22) 20 (4.5)
BLM5120
BLM5200
BLM5300
BLM5400
150 (33) 170 (38) 25 (5.6)