6
Installing a load
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Combination type-parallel shaft gearhead, round shaft type
When installing a load on the motor or gearhead, align the center of the motor output
shaft (gearhead output shaft) with the center of the load shaft.
Note
•
When coupling the motor or the gearhead with a load, pay attention to
centering, belt tension, parallelism of pulleys, etc. Also, firmly secure the
tightening screws of the coupling or pulleys.
•
When installing a load, do not damage the motor output shaft (gearhead
output shaft) or bearings. 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. This
may damage the bearing, resulting in damage to the motor and gearhead.
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Output shaft shape
Combination type-parallel shaft gearhead
A key slot is provided on the output shaft of gearhead. Form a key slot on the load side,
and secure the load using the included parallel key.
Round shaft type
A flat section is provided on the motor output shaft of each round shaft type. Apply a
double-point screw, etc., at the flat section to firmly secure the load and prevent it from
spinning.
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How to install a load
Using a coupling
Align the centerline of the motor or gearhead output shaft with the centerline of the load
shaft.
Using a belt
Adjust the motor or gearhead output shaft to lie parallel with the load shaft, and form right
angles between the output shaft/load shaft and the line connecting the centers of both
pulleys.
Using a gear
Adjust the motor or gearhead output shaft to lie parallel with the gear shaft, and allow the
output shaft to mesh correctly with the centers of the gear teeth.
When using the output shaft end tapped hole of a gearhead (excluding
GFS2G
)
Use a tapped hole provided at the end of the output
shaft as an auxiliary means for preventing the transfer
mechanism from disengaging.
Fixed screw
Screw
Spacer
Transmission parts
Example of use for output shaft
end tapped hole
Gearhead
model
Output shaft end tapped hole
GFS4G
M5, Effective depth 10 mm (0.39 in)
GFS5G
GFS6G
M6, Effective depth 12 mm (0.47 in)
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Combination type-hollow shaft flat gearhead
If the motor is subject to a strong impact upon instantaneous stop or receives a large
overhung load, use a stepped load shaft.
Note
•
Apply grease (molybdenum disulfide grease, etc.) on the surface of the
load shaft and inner walls of the hollow output shaft to prevent seizure.
•
When installing a load, do not damage the motor output shaft (gearhead
output shaft) or bearings. 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.
This may damage the bearing, resulting in damage to the motor and
gearhead.
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Stepped load shaft
Secure the retaining ring for hole to the load shaft by tightening the hexagonal socket
head screw over a spacer, plain washer and spring washer.
Plain washer
Spacer
Retaining ring
for hole
Stepped load shaft
Parallel
key
Spring washer
Hexagonal socket head screw
Retaining ring for hole
Hollow output shaft
Hexagonal
socket
head screw
Spring washer
Plain washer
Spacer
Parallel key
Load shaft
ØD
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Non-stepped load shaft
Install a spacer on the load shaft side and secure the retaining ring for hole to the load shaft
by tightening the hexagonal socket head screw over a spacer, flat washer and spring washer.
Plain washer
Spacer
Retaining ring
for hole
Spring washer
Hexagonal socket head screw
Spacer
Load shaft
Parallel
key
Spacer
Retaining ring for hole
Hollow output shaft
Hexagonal
socket
head screw
Spring washer
Plain washer
Spacer
Parallel key
Load shaft
Recommended load shaft installation dimensions [Unit: mm (in.)]
Model
Inner diameter of hollow
shaft (H8)
Recommended diameter
of load shaft (h7)
Nominal diameter of
retaining ring for hole
BXM230
Ø12
+0.027
0
(Ø0.4724
+0.0011
0
)
Ø12
0
-0.018
(Ø0.4724
0
-0.0007
)
Ø12(Ø0.47)
BXM460
Ø15
+0.027
0
(Ø0.5906
+0.0011
0
)
Ø15
0
-0.018
(Ø0.5906
0
-0.0007
)
Ø15(Ø0.59)
BXM5120
Ø20
+0.033
0
(Ø0.7874
+0.0013
0
)
Ø20
0
-0.021
(Ø0.7874
0
-0.0008
)
Ø20(Ø0.79)
BXM6200
BXM6400
Ø25
+0.033
0
(Ø0.9843
+0.0013
0
)
Ø25
0
-0.021
(Ø0.9843
0
-0.0008
)
Ø25(Ø0.98)
Model
Applicable screw Spacer thickness
Outer diameter of
stepped shaft (ØD)
BXM230
M4
3 (0.12)
20 (0.79)
BXM460
M5
4 (0.16)
25 (0.98)
BXM5120
M6
5 (0.20)
30 (1.18)
BXM6200
BXM6400
M8
6 (0.24)
[3 (0.12)]
*
40 (1.57)
*
The value in the brackets [ ] assumes when using the rear side as the mounting surface.
Permissible radial load and permissible axial load
Make sure a radial load and axial load applied to the output shaft of the motor and
gearhead will not exceed the permissible values shown in the table 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.
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Combination type-parallel shaft gearhead
10 mm (0.39 in.)
20 mm (0.79 in.)
Distance from output shaft end
Axial load
Radial load
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.)
BXM230
5
100 (22) [90 (20)]
150 (33) [110 (24)]
40 (9)
10
to
20
150 (33) [130 (29)]
200 (45) [170 (38)]
30
to
200
200 (45) [180 (40)]
300 (67) [230 (51)]
BXM460
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)]
BXM5120
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)]
BXM6200
BXM6400
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 brackets [ ] are
based on a speed of 4000 r/min.
