A
C
Motor
s
Induction
Motor
s
Sync
hr
onous
Motor
s
To
r
que
Motor
s
W
ater
tight
Motor
s
Ma
gnetic
Brake
Clutc
h &
Brake
Brake
Pa
c
k
Re
ver
sib
le
Motor
s
Right-Angle
Gearheads
Accessories
Intr
oduction
Bef
ore Using
a Standar
d
AC

Motor
Before Using a Standard AC Motor A-220
Standar
d
A
C
Motor
s
Installation Conditions
Install the motor, gearhead, control circuit (speed control
pack, control unit and brake pack) in a location that meets
the following conditions. Using them in a location that does
not satisfy these conditions could damage the products. Indoors (this product is designed and manufactured to be
installed within another device.) Ambient temperature
14°F 104°F [ 10°C
40°C (nonfreezing)], [for some
motors, 14°F 122°F ( 10°C
50°C) or 32°F 122°F
(0°C
50°C)]
For control circuits, the ambient temperature range varies
with each product. Refer to the pages where each product
is listed. Ambient humidity 85% max. (avoid condensation) Not exposed to explosive, flammable or corrosive gas Not exposed to direct sunlight Not exposed to dust Not exposed to water or oil Place where heat can escape easily Not exposed to continuous vibration or excessive impact Installation Category@, Pollution Degree 2, Class!
Equipment Only for the products that are certified by EN/IEC standards and conform to
EN/IEC standards.
Installation Category3, Pollution Degree 3 for some products
Connecting Gearheads to Motors
Method of Connecting Gearheads to Motors
As the figure below shows, a gearhead is combined with a
motor using the pilots on each unit as guides. The gearhead
should be moved gently from side to side without forcing the
pinion shaft against the plate on the gearhead (metal plate)
or against the gear itself.
Note: Attempting to put a motor and gearhead together by force can result in damage
to the gearheads.
Mounting Motor/Gearhead to Machinery
The motor flange is provided with a pilot section that serves
as a guide not only when assembling the motor and
gearhead as shown in the previous figure, but also when
installing the motor/gearhead unit
onto the machinery.
In this example, the motor/gearhead
unit is mounted to a dedicated
mounting brackets.
Refer to page A-204 for details.
When mounting motors that have a
built-in cooling fan at the rear, leave
a space of 0.4 inch (10 mm) or more behind the fan cover or
make ventilation holes so as not to block the cooling intake.
For
GN Type and 5GU KA Type Gearheads
Use the screws provided with the gearhead and secure all
the parts so that there are no gaps between the motor flange
face and the pilot end face of the gearhead.
For
5GU KHA Type Gearheads
Before mounting to machinery, assemble the motor and the
gearhead using the screws provided with the gearhead.
Screws for mounting to machinery are not provided. M8
screws must be provided separately.
Before Using a Standard AC Motor
Pinion Shaft
Pilot End Face
Pilot Section
Flange Surface
Dedicated Mounting Bracket
Motor
Gearhead
Screws Provided
with Gearhead
Through Hole
Tapped Hole
Screws provided
with Gearhead Dimensions of Mounting Holes
The dimension of the 4 motor mounting holes are shown as
the pitch diameter in the dimensions of each product.
The distance between mounting holes is shown in the table.
Mounting Method for Hollow Shaft Type
Gearheads Example of Attaching the Load
Attach the load according to load shaft conditions as shown
in the figure below. The hollow shaft inside dimension is
machined to a tolerance of H8, and incorporates a key slot
for load shaft attachment. A load shaft tolerance of h7 is
recommended. The key provided with the product should be
secured on the shaft. Also, apply a lubricant such as
molybdenum disulphide grease to the load shaft and the
inner circumference of the hollow shaft. The recommended
dimensions of load shaft are shown in the table below.
4GN RH, 5GN RH, 5GU RH
For
FPW Series, V Series, BH Series and
BHF Series Parallel Shaft Type Gearheads
The
V Series, BH Series and BHF Series parallel shaft
gearmotors come with the motor and its dedicated gearhead
pre-assembled. Mount to machinery using the mounting
screws provided.
FPW Series should also be mounted using
the stainless steel mounting screws provided.
For Right-Angle Gearheads
Attach the provided gasket between the motor flange face
and the pilot end face. Do not bent or scratch the gasket.
Before mounting the right-angle gearhead to machinery,
assemble the motor and the gearhead using the screws
provided.
(
BH Series and BHF Series right-angle come pre-assembled
with the motor and its dedicated gearhead.) Screws for
mounting to machinery are not provided. M6 screws (for
GN
type) or M8 (for
GU type, BH Series and BHF Series right-
angle) must be provided separately.
For Mounting a Decimal Gearhead to
GN Type
and
5GU KA Type Gearheads
Use the screws provided with the decimal gearhead and
secure all the parts so that there are no gaps between the
motor flange face and the pilot end face of the decimal
gearhead, or between the decimal gearhead and the
gearheads pilot end face.
A-221
Standar
d
A
C
Motor
s
Induction
Motor
s
Sync
hr
onous
Motor
s
To
r
que
Motor
s
W
ater
tight
Motor
s
Ma
gnetic
Brake
Clutc
h &
Brake
Brake
Pa
c
k
Re
ver
sib
le
Motor
s
Right-Angle
Gearheads
Accessories
Intr
oduction
Bef
ore Using
a Standar
d
AC

Motor
Motor
Mounting Screw
(Hexagonal socket head screw M8)
Screws Provided with Right-angle Gearhead
Gasket Provided
with Right-angle Gearhead
Motor
Decimal Gearhead
Gearhead
Load Shaft
Hollow Shaft
Spacer
Flat Washer
Bolt (M6)
Spring Washer
Retaining Ring for Hole
Spacer
Load Shaft
Hollow Shaft
Spacer
Flat Washer
Bolt (M6)
Spring Washer
Retaining Ring for Hole
4GN RH
0.5906
0
0.0011
( 15
0
0.027
)
0.5906
0
0.0007
( 15
0
0.018
)
5GN RH
0.5906
0
0.0011
( 15
0
0.027
)
0.5906
0
0.0007
( 15
0
0.018
)
5GU RH
0.6693
0
0.0011
( 17
0
0.027
)
0.6693
0
0.0007
( 17
0
0.018
)
BHI62 - RH
BHI62 T- RH
0.9843
0
0.0013
( 25
0
0.033
)
0.9843
0
0.0008
( 25
0
0.021
)
BHF62 T- RH
BHF62 MT- RH Enter the gear ratio in the box ( ) and
F, E or S which indicates
the power supply voltage in the box (
) within the model name.
Model
Inner Diameter of
Hollow-shaft
Recommended Load
Shaft diameter
Unit = inch (mm)
B
B
C
A
Motor Frame Size
C
Unit = inch (mm)
B
A
1.65 ( 42)
1.4803 (37.6)
1.336 (33.94)
1.89 (48)
2.36 ( 60)
2.1260 (54)
1.949 (49.50)
2.76 (70)
2.76 ( 70)
2.5197 (64)
2.283 (57.98)
3.23 (82)
3.15 ( 80)
2.8740 (73)
2.617 (66.47)
3.70 (94)
3.54 ( 90)
3.2677 (83)
2.895 (73.54)
4.09 (104)
4.09 ( 104)
3.7008 (94)
3.341 (84.85)
4.72 (120)
Stepped-down shafts
Straight load shafts
See Page (A-222) for
BH Series, BHF Series
Right-Angle Hollow Shaft Types BH Series, BHF Series Right-Angle Hollow Shaft Type
After securing a load, attach the safety cover provided.
Note: Do not apply excessive force when inserting the load shaft into the hollow shaft
of the gearhead. Excessive force may damage the gearheads internal bearings.
When the bolt is sticking out 0.16 inch (4 mm) or longer from the hollow shaft
end, the safety cover cannot be attached.
Method of Securing the Load to an Output Shaft
The output shafts of high-power gearheads are provided with
a key slot to secure the load, while the shafts of gearheads
with comparatively low power have been given a shaft flat.
Round shaft motors come in two types, those with and
without a shaft flat on the motor output shaft.
On round shaft types, the output shaft is machined to the
accuracy of h7 in dimension and 0.0008 inch or less in
eccentricity. Therefore, when connecting a load to the shaft
of the device, take measurements using a dial gauge or
similar instrument so that there is no eccentricity. When the
shaft center of two shafts does not fit, use a flexible coupling
(MCL coupling) etc. to avoid unnecessary strain on the shaft.
The same procedure should be applied when securing a load
to gearheads.
Securing the Load to a Shaft Flat
With a shaft flat, use a locking screw
to ensure that the load does not slip.
We recommend using double point
screws or other screws with strong
locking power.
Securing the Load Using a Key Slot
Secure loads using the key provided
with the gearhead after machining
the key slot on the equipment to be
connected (sprocket etc.).
Note: Ensure that the gearhead shaft is not subjected to shock in the axial direction,
since this will have an adverse effect on the bearings. Be especially careful not
to use a hammer when inserting the key.
Capacitor Attachment Method
Unit = inch (mm)
A-222
Standar
d
A
C
Motor
s
Load Shaft
Hollow Shaft
Spacer
Flat Washer
Bolt (M6)
Spring Washer
Retaining Ring for Hole
Spacer
Load Shaft
Hollow Shaft
Spacer
Flat Washer
Bolt (M6)
Spring Washer
Retaining Ring for Hole
Shaft Flat
0GN, 2GN, 3GN, 4GN, 5GN, 4GN RAA, 5GN RAA gearhead
AXH015 and round shaft type motors with a motor frame size of 3.15
inch (80 mm) or larger
Key Slot
5GU, 5GC, 5GCH, 5GU RAA, RH Gearheads, 5GU KHA,
V Series, BH Series, FBL2 Series, AXH Series (except 15 W)
Locking Screw
Key
0.169
( 4.3)
M4 Screw
M4 Screw
0.169
( 4.3)
Attach a capacitor
securely, using an M4
screw.
(The M4 screw is not
provided.)
Stepped-down shafts
Straight load shafts A-223
Standar
d
A
C
Motor
s
Induction
Motor
s
Sync
hr
onous
Motor
s
To
r
que
Motor
s
W
ater
tight
Motor
s
Ma
gnetic
Brake
Clutc
h &
Brake
Brake
Pa
c
k
Re
ver
sib
le
Motor
s
Right-Angle
Gearheads
Accessories
Intr
oduction
Bef
ore Using
a Standar
d
AC

Motor
Dimensions of Screws Provided
V Series
The following screws are provided with the gearhead.
GN Typ