3
Removing and assembling the gearhead
This is the procedure to replace the gearhead or to change the position of the terminal
box.
Removing the gearhead from the motor
Remove the hexagonal socket head screws (4 places) assembling the motor and gearhead,
and detach the gearhead from the motor.
Hexagonal socket head screw
Assembling the gearhead to the motor
1.
Keep the pilot sections of the motor and gearhead in parallel, and assemble the
gearhead with the motor while slowly rotating it clockwise/counterclockwise. At this
time, note so that the pinion of the motor output shaft does not hit the gearhead or
gears strongly.
2.
Check that there is no gap between the motor and the gearhead, and tighten them
with hexagonal socket head screws (4 places).
Screw size: M8
Tightening torque: 15.5 N·m (137 lb-in)
Assemble the gearhead to the motor in a condition where
the motor output shaft is in an upward direction.
Pinion of the motor
output shaft
Pilot section
Note
•
Do not forcibly assemble the motor and gearhead. Also, prevent metal
objects or foreign substances from entering in the gearhead. The pinion
of the motor output shaft or gear may be damaged, resulting in noise or
shorter service life.
•
Do not allow dust to attach to the pilot sections of the motor and gearhead.
Also, assemble the motor and gearhead carefully by not pinching the
O-ring at the motor pilot section. If the O-ring is crushed or severed, grease
may leak from the gearhead.
z
Round shaft type
Secure the product using hexagonal socket head screws (not included) through the four
mounting holes.
Install so that there is no gap between the product and the mounting plate.
Screw size: M8
Tightening torque: 12.0 N·m (106 lb-in)
Motor
Mounting plate
Installing a load
z
Combination type-parallel shaft gearhead
The gearhead output shaft is finished to an outer diameter tolerance of h7 and is provided
with a key slot for installing the transmission parts. Be sure to fit the output shaft and the
transmission parts by a clearance fit when installing.
In addition, always fix the parallel key to the output shaft with a screw to prevent the
transmission parts from rattling or spinning.
Screw
Parallel key
Gearhead
output shaft
Note
Do not apply excessive force onto the gearhead output shaft using a hammer
or other tools.
Doing so may cause damage to the output shaft or bearings.
•
•
When using the output shaft end tapped hole of a gearhead
Use a tapped hole provided at the end of the output shaft as an auxiliary means for
preventing the transfer mechanism from disengaging.
Output shaft end tapped hole: M6, effective depth 12 mm (0.47 in)
Fixed screw
Screw
Spacer
Transmission parts
z
Combination type-right angle hollow shaft hypoid gear
GV
gearhead
The installation method of a load varies depending on the shape of a load shaft. Refer to
the figures below.
The output shaft is finished to an inner diameter tolerance of H8, and is provided a
key slot for installing a load shaft. A load shaft tolerance of h7 is recommended. Apply
molybdenum disulfide grease on the surface of the load shaft and the inner walls of the
hollow output shaft to prevent seizure.
After installing the load, attach the safety cover.
[Tightening torque: 0.35 to 0.45 N·m (3.0 to 3.9 lb-in)]
•
•
Recommended load shaft dimensions
Hollow output shaft inner diameter (H8) Recommended load shaft dimensions (h7)
Ø25
+0.033
0
mm (Ø0.9843
+0.0013
0
in.)
Ø25
0
−0.021
mm (Ø0.9843
0
−0.0008
in.)
•
•
Stepped load shaft
Load shaft
Spacer
Hollow output shaft
Plain washer
Spring washer
Retaining ring for hole
Screw (M6)
•
•
Non-stepped load shaft
Load shaft
Spacer
Hollow output shaft
Plain washer
Spring washer
Retaining ring for hole
Screw (M6)
Spacer
Note
Do not apply excessive or abrupt force to the hollow output shaft when
inserting a load shaft into the hollow output shaft. Excessive or abrupt force
may damage the gearhead internal bearings.
Permissible radial load and permissible axial load
The radial load and axial load have a great influence on the life of the bearings and
strength of the shaft.
Do not exceed the permissible radial load and permissible axial load.
Refer to Oriental Motor Website for details.
