3
•
Stepped load shaft
•
Affixing method using retaining ring
Install each hexagonal socket head screw over a retaining ring, spacer, flat
washer and spring washer and securely affix the ring.
Retaining ring
Hollow output shaft
Hexagonal socket
head screw
Spring washer
Flat washer
Spacer
Parallel key
Load shaft
ØD
Flat washer
Spacer
Retaining ring
Parallel key
Spring washer
Hexagonal socket
head screw
•
Affixing method using end plate
Affix the load shaft by tightening the hexagonal socket head screw over an
end plate, flat washer and spring washer.
ØD
Hollow output shaft
Hexagonal socket
head screw
Spring washer
Flat washer
End plate
Parallel key
Load shaft
Flat washer
End plate
Parallel key
Spring washer
Hexagonal socket
head screw
Note
The supplied safety cover cannot be installed because it
interferes against the hexagonal socket head screws. The
customer must provide other protective measure for the
rotating part.
•
Non-stepped load shaft
Install each hexagonal socket head screw over a retaining ring, spacer, flat
washer and spring washer and securely affix the ring. Also insert a spacer on
the load shaft side.
Spacer
Retaining ring
Hollow output shaft
Hexagonal socket
head screw
Spring washer
Flat washer
Spacer
Parallel key
Load shaft
Flat washer
Spacer
Retaining ring
Spring washer
Hexagonal socket
head screw
Spacer
Parallel key
•
Recommended load shaft installation dimensions
[Unit: mm (in.)]
Model
∗
Inner diameter of
hollow shaft (H8)
Recommended tolerance
of load shaft (h7)
GFS2G FR
Ø12
+ 0.027
0
(Ø0.4724
+ 0.0011
0
)
Ø12
0
- 0.018
(Ø0.4724
0
- 0.0007
)
GFS4G FR
Ø15
+ 0.027
0
(Ø0.5906
+ 0.0011
0
)
Ø15
0
- 0.018
(Ø0.5906
0
- 0.0007
)
GFS5G FR
Ø20
+ 0.033
0
(Ø0.7874
+ 0.0013
0
)
Ø20
0
- 0.021
(Ø 0.7874
0
- 0.0008
)
GFS6G FR
Ø25
+ 0.033
0
(Ø0.9843
+ 0.0013
0
)
Ø25
0
- 0.021
(Ø0.9843
0
- 0.0008
)
Model
∗
Nominal diameter of
retaining ring
Applicable screw
GFS2G FR
Ø12 (Ø0.47)
M4
GFS4G FR
Ø15 (Ø0.59)
M5
GFS5G FR
Ø20 (Ø0.79)
M6
GFS6G FR
Ø25 (Ø0.9843)
M10
Model
∗
Spacer
thickness
Outer diameter of
stepped shaft (ØD)
GFS2G FR
3 (0.12)
20 (0.79)
GFS4G FR
4 (0.16)
25 (0.98)
GFS5G FR
5 (0.20)
30 (1.18)
GFS6G FR
6 (0.24)
40 (1.57)
∗
in the model names indicates a number representing the gear ratio.
Note
•
When installing the load shaft onto the hollow output
shaft, be careful not to damage the hollow output shaft or
the bearing.
•
Apply grease (molybdenum disulfide grease, etc.) on the
surface of the load shaft and inner walls of the hollow
output shaft to prevent seizure.
•
Do not modify or machine the hollow output shaft. Doing
so may damage the bearing and cause the gearhead to
break.
•
If the motor receives an overhung load, it is
recommended that the load be affixed using one of the
installation methods explained under “Stepped load
shaft.”
