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[Caution on Product Characteristics] ① The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see Page 31 for more details.② The backlash values shown in the table are the theoretical values for the backlash in the normal direction of a pair of identical gears in mesh.
[Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 32) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.
② Avoid performing secondary operations that narrow the tooth width as it affects precision and strength.
* The precision grade of J Series products is equivalent to the value shown in the table.
Catalog No. No. of teeth ShapeBore Pitch dia. Outside dia. Face width Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
AH7 C D E Bending strength Surface durability Bending strength Surface durability (mm) (kg)
* For products not categorized in our KHK Stock Gear series, custom gear production services with short lead times is available. For details see Page 25.
115
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Drawing can be outputted from the Web Catalog as DXF files. 115
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Drawing can be outputted from the Web Catalog as DXF files.
Bore H7
Keyway Js9
Screw sizeCatalog No.
Steel Hubless Spur Gears
SSA
A C D
E
S5K
To order J Series products, please specify; Catalog No. + J + BORE
[Caution on J series] ① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.③ Keyways are made according to JIS B1301 standards, Js9 tolerance.④ Areas of products which have been re-worked will not be black oxide coated.
* The product shapes of J Series items are identified by background color.
116 117
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Drawing can be outputted from the Web Catalog as DXF files.116 117
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ical
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rsS
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Gea
rsW
orm
Gea
r P
airs
Bev
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earb
oxes
Oth
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rod
ucts
Drawing can be outputted from the Web Catalog as DXF files.
* The precision grade of J Series products is equivalent to the value shown in the table.
Catalog No. No. of teeth ShapeBore Pitch dia. Outside dia. Face width Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
AH7 C D E Bending strength Surface durability Bending strength Surface durability (mm) (kg)
To order J Series products, please specify; Catalog No. + J + BORE
[Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 32) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.
② Avoid performing secondary operations that narrow the tooth width as it affects precision and strength.
Module 2、2.5
[Caution on Product Characteristics] ① The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see Page 31 for more details.② The backlash values shown in the table are the theoretical values for the backlash in the normal direction of a pair of identical gears in mesh.
[Caution on J series] ① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.③ Keyways are made according to JIS B1301 standards, Js9 tolerance.④ Areas of products which have been re-worked will not be black oxide coated.
* The product shapes of J Series items are identified by background color.
*�For products not categorized in our KHK Stock Gear series, custom gear production services with short lead times is available. For details see Page 25.
NewNew
118 119
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S5M S5M
A C D
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K
LJ
G
Bore A * The product shapes of F Series items are identified by background color.
Bushing Integrated Gears Now Available! Features・ No rattling of shaft and gear when fastening・ Freely positionable mounting for easy
meshing of teeth・ Easily mounted and removed for
repeated use・ The bushing slides when overloaded
to reduce damage to the gears
Specifications
Precision gradeJIS grade N8 (JIS B 1702-1: 1998) * Former JIS grade 4 (JIS B 1702: 1976)
Gear teeth Standard full depth
Pressure angle 20°
Material S45C
Heat treatment -
Tooth hardness (less than 194HB)
Surface treatment Black oxide coating
* The precision grade of F Series products is equivalent to the value shown in the table.
■ Mounting Method and Precautions
■ Removal Method and Precautions
① Shaft diameter recommended tolerance is h7. The limit is h8, but we recommend h6 when minimizing runout. Use 1.6a as reference for the surface roughness of the shaft diameter.
② �Wipe away any debris, dirt or oil from the bushing and shaft surface and pass completely through the shaft before tightening. Removal will not be possible, so be sure to leave a clearance of 1mm or more on the gear rear surface side. (Figure 1)
③ �Use a torque wrench to fasten bolts on opposite sides when tightening. First tighten at 1/4 of the regulated torque, then at 1/2 of the regulated torque, before finally tightening up to the regulated torque. Do not tighten without passing through the shaft, or fasten the bolts after insertion on the draft tap side. (Figure 2)
④ �If the shaft has a keyway, the fastened section contact area is reduced and the transmission rate is decreased by 15 to 20%.
① �Turn off the power source (supply), check that no load is applied to the gear, and confirm that there is no danger due to falling, etc.
② �Turn off the power source (supply), check that no load is applied to the gear, and confirm that there is no danger due to falling, etc.
③ �The washer and thread surfaces will be roughened, compromising tightening strength, if the bolts are reused. Consequently, we recommend using new bolts of the same size.
BearingCollarGear
Bushing
Clearance (Assembly conditions require clearance of 1 mm or more)
Figure 1
S1MA
G
A B C D
E F
K
L
J
Figure 2
Hex socket bolt
Draft tap
②
①
③④
Steel Hubless Spur Gears
SSA
F Series
To order F Series products, please specify: Catalog Number + F + BORE.
[Caution on F Series] ① As available-on-request products, these require a lead-time for shipping within 2 working days (excludes the day ordered) after placing an order.② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.③ Additionally the machined parts of the fastener components and gears are not black oxide coated.
Drawing can be outputted from the Web Catalog as DXF files.
NewNew
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Drawing can be outputted from the Web Catalog as DXF files.120 121
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ical
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rsIn
tern
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ears
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acks
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iter
Gea
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evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
airs
Bev
elG
earb
oxes
Oth
erP
rod
ucts
Drawing can be outputted from the Web Catalog as DXF files.
* The precision grade of J Series products is equivalent to the value shown in the table.
Catalog No. No. of teeth ShapeBore Pitch dia. Outside dia. Face width Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
AH7 C D E Bending strength Surface durability Bending strength Surface durability (mm) (kg)
To order J Series products, please specify; Catalog No. + J + BORE
[Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 32) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.
② Avoid performing secondary operations that narrow the tooth width as it affects precision and strength.
Module 3、4、5
[Caution on Product Characteristics] ① The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see Page 31 for more details.② The backlash values shown in the table are the theoretical values for the backlash in the normal direction of a pair of identical gears in mesh.
[Caution on J series] ① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.
② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.
③ Keyways are made according to JIS B1301 standards, Js9 tolerance.④ Areas of products which have been re-worked will not be black oxide coated.
* The product shapes of J Series items are identified by background color.
◎ Gear tooth induction hardening is available as a secondary operation. For cautions relating to hardening, refer to "Caution on Performing Secondary Operations" on Page 32.
Newly addedNewly added
122 123
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Hel
ical
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rod
ucts
S5M
Bore A * The product shapes of F Series items are identified by background color.
◎ Gear tooth induction hardening is available as a secondary operation. For cautions relating to hardening, refer to "Caution on Performing Secondary Operations" on Page 32.
Steel Hubless Spur GearsModule 3SSA
Bushing Integrated Gears Now Available! Features・ No rattling of shaft and gear when fastening・ Freely positionable mounting for easy
meshing of teeth・ Easily mounted and removed for
repeated use・ The bushing slides when overloaded
to reduce damage to the gears
Specifications
Precision gradeJIS grade N8 (JIS B 1702-1: 1998) * Former JIS grade 4 (JIS B 1702: 1976)
Gear teeth Standard full depth
Pressure angle 20°
Material S45C
Heat treatment -
Tooth hardness (less than 194HB)
Surface treatment Black oxide coating
* The precision grade of F Series products is equivalent to the value shown in the table.
■ Mounting Method and Precautions
■ Removal Method and Precautions
① Shaft diameter recommended tolerance is h7. The limit is h8, but we recommend h6 when minimizing runout. Use 1.6a as reference for the surface roughness of the shaft diameter.
② �Wipe away any debris, dirt or oil from the bushing and shaft surface and pass completely through the shaft before tightening. Removal will not be possible, so be sure to leave a clearance of 1mm or more on the gear rear surface side. (Figure 1)
③ �Use a torque wrench to fasten bolts on opposite sides when tightening. First tighten at 1/4 of the regulated torque, then at 1/2 of the regulated torque, before finally tightening up to the regulated torque. Do not tighten without passing through the shaft, or fasten the bolts after insertion on the draft tap side. (Figure 2)
④ �If the shaft has a keyway, the fastened section contact area is reduced and the transmission rate is decreased by 15 to 20%.
① �Turn off the power source (supply), check that no load is applied to the gear, and confirm that there is no danger due to falling, etc.
② �Turn off the power source (supply), check that no load is applied to the gear, and confirm that there is no danger due to falling, etc.
③ �The washer and thread surfaces will be roughened, compromising tightening strength, if the bolts are reused. Consequently, we recommend using new bolts of the same size.
BearingCollarGear
Bushing
Clearance (Assembly conditions require clearance of 1 mm or more)
Figure 1
S1MA
G
A B C D
E FK
L
J
Figure 2
Hex socket bolt
Draft tap
②
①
③④
F Series Steel Hubless Spur Gears
SSA
To order F Series products, please specify: Catalog Number + F + BORE.
[Caution on F Series] ① As available-on-request products, these require a lead-time for shipping within 2 working days (excludes the day ordered) after placing an order.② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.③ Additionally the machined parts of the fastener components and gears are not black oxide coated.
Drawing can be outputted from the Web Catalog as DXF files.