• Decimal gearhead
Motor
Decimal gearhead
Gearhead
Washers
Nuts
Screws for mounting
provided with decimal gearhead
Mounting
Plate
Use the screws provided with the decimal gearhead and secure all parts so that
there are no gaps between the motor flange face and the recessed area of the
decimal gearhead and between the decimal gearhead and the gearhead's recessed
area.
∗ Dedicated mounting brackets can also be used for installing gearmotor.
For details, please refer to catalogue.
∗ Refer Table 2 for the size of installation hole.
Attaching Load
The shaft of the gearhead has been machined to an outer diameter tolerance of h7
and is provided with a key slot for connecting the transmission parts. (Model 2GN
type have a flat on the shaft.)
When connecting the transmission parts, ensure that the shaft and parts have a
clearance fit, and secure with a screw to prevent the parts from wobbling.
Use a screw hole (M5, effective depth 10 mm) provided at the tip of the output
shaft of 5GES as an auxiliary means for preventing the transfer mechanism
from disengaging.
< The example of output axis
tip screw hole use >
Motor Gearhead
Key
Fixed screw
Transmission parts
Fixed screw
Screw
Spacer
Transmission parts
Note Do not use excessive force, or hammer the
transmission parts onto the gearmotor shaft
as damage may occur.
Precautions for Operation
• Use your gearmotor under ambient temperature of
-
10 to +50 °C and 85%
humidity.
• Do not use your gearmotor where it may be exposed direct sunlight water and/
or oil.
• Do not use your gearmotor in locations subject to severe vibration or shock, a
large amount of dust, inflammable gas and or corrosive gas.
• On rare occasions, a small amount of grease may ooze out from the gearhead. If
there is concern over possible environmental damage resulting from the leakage
of grease, check for grease stains during regular inspections. Alternatively,
install an oil pan or other device to prevent leakage from causing further
damage. Oil leakage may lead to problems in the customer’s equipment or
products.
• Direction of Rotation of the Gearhead Output Shaft
With some gear ratios, the motor and gearhead output shaft will rotates in opposite
directions. The direction of rotation does not change if a decimal gearhead is
connected.
Gear Ratio
Gearhead Model Name Same direction as motor Opposite direction
to motor
3 to 18
2GNS 3GNS
4GNS 5GNS 50 to 180 25 to 36
3 to 9 12.5 to 18
5GES 25 to 60 75 to 180
∗ The square box in the gearhead model will contain a value representing the
gear ratio.
• Maximum Permissible Torque
Since the output torque of the gearhead increases proportionally with the reduction
of speed, a high reduction ratio of the gearhead will result in an output torque that
cannot be taken up by the physical construction of the gearhead. Use gearheads
within the maximum permissible torque set for each speed reduction ratio. For the
values of the maximum permissible torque, please refer to catalogue. Also, be sure
shaft rotation is not stopped by an external force or load obstruction. The resulting
shock may damage the gearhead.
• Permissible Overhung Load and Permissible Thrust Load
“Overhung load” refers to load placed on the output
shaft of the gearhead in a direction perpendicular to
the shaft as shown to the right. The “Thrust load” is
a load applied in the axial direction of the output
shaft. Since the overhung load and thrust load have
a great influence on the life of the bearings and
strength of the shaft, be careful not to exceed the
maximum values shown in the Table 3.
Gearhead
Overhung load
Thrust load
Table 3. Permissible Overhung Load and Thrust Load
Permissible
Overhung Load N
Output axis tip
Gearhead
Model
Name
Gear
ratio
Maximum
Permissible
Torque
N·m 10 mm 20 mm
Permissible
Thrust
Load
N
3 to 18 50 80
2GNS 25 to 180 3 120 180 30
3 to 18 80 120
3GNS 25 to 180 5 150 250 40
3 to 18 100 150
4GNS 25 to 180 8 200 300 50
3 to 18 250 350
5GNS 25 to 180 10 300 450 100
3 to 9 400 500
12.5 to 18 450 600
5GES
25 to 180
20
500 700
150
∗ The square box in the gearhead model will contain a value representing the
gear ratio.
• Unauthorized reproduction or copying of all or part of this manual is
prohibited.
• Oriental Motor shall not be liable whatsoever for any problems relating to
industrial property rights arising from use of any information, circuit,
equipment or device provided or referenced in this manual.
• Characteristics, specifications and dimensions are subject to change without
notice.
• While we make every effort to offer accurate information in the manual, we
welcome your input. Should you find unclear descriptions, errors or
omissions, please contact the nearest office.
• is a registered trademark or trademark of Oriental Motor
Co., Ltd., in Japan and other countries.
© Copyright ORIENTAL MOTOR CO., LTD. 2007
Printed on Recycled Pape
• Please contact your nearest Oriental Motor office for further information.
Headquarters Tokyo, Japan
Tel:(03)3835-0684 Fax:(03)3835-1890
Tel:01 47 86 97 50 Fax:01 47 82 45 16
Tel:(02)8228-0707 Fax:(02)8228-0708
Technical Support Tel:(800)468-3982
8:30
A.M.
to 5:00
P. M .
, P.S.T. (M-F)
7:30
A.M.
to 5:00
P. M .
, C.S.T. (M-F)
E-mail: techsupport@orientalmotor.com
www.orientalmotor.com
Headquarters and Düsseldorf Office Tel:0211-52067-00 Fax:0211-52067-099
Munich Office Tel:089-3181225-00 Fax:089-3181225-25
Hamburg Office Tel:040-76910443 Fax:040-76910445
Tel:01256-347090 Fax:01256-347099
Tel:02-93906346 Fax:02-93906348
Tel:(6745)7344 Fax:(6745)9405
KOREA
Tel:(032)822-2042~3 Fax:(032)819-8745
Tel:(03)22875778 Fax:(03)22875528
Tel:66-2-254-6113 Fax:66-2-254-6114