Helical Gears - Module 1.0, Shaft Bore Configurable Type

Helical Gears - Module 1.0, Shaft Bore Configurable Type

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Features: Helical gears have a higher contact ratio than spur gears, resulting in superior transmission accuracy and quieter operation.
Right-twisted helical gears engage with left-twisted helical gears.
Four types of shaft bore are selectable: straight bore, straight bore + tap, keyway, and keyway + tap.
Available alterations: Set screw alteration, tapped hole dimension change, stepped hole, both ends stepped hole, hub cut, hub diameter cut, side slotted hole, side through hole, side tapped hole, and side counterbored hole alterations are possible.
Lineup by moduleModule 1.5Module 2.0Module 2.5Module 3.0

(i)Remark

  • When downloading CAD data, the tooth shape will not be generated on the 3D drawing. Please refer to the reference circle on the 3D drawing.

Part Number

Once your search is narrowed to one product,
the corresponding part number is displayed here.

Gear Shape
Shape A
Shape B
● Shaft Bore Specifications (Selectable Gear Shapes)
Straight Bore (Shape A, Shape B)Straight Bore + Tap
(Shape B)
Keyway (Shape A)Keyway + Tap
(Shape B)
[ ! ] Refer to the dimensions table for keyway dimension details.
[!] Relative positioning of keyway and teeth is not fixed.
Gear dimensions
Datum Section of GearsTeeth perpendicular
Module1.0
Pressure Angle20°
Helix Angle19° 31′42″
Gear AccuracyJIS B 1702-1, ISO 1328-1, Flank Tolerance Class 8
Type[M] Material[S] Surface Treatment[A]Accessory
Straight BoreStraight Bore + TapKeyway, Keyway + Tap
HGEARHBHGEARBHGEARKBEN 1.1191 Equiv.Set Screw
(EN 1.7220 Equiv. Black Oxide)
HGEARHBBHGEARBBHGEARKBBBlack Oxide
HGEARHBGHGEARBGHGEARKBGElectroless Nickel Plating
[!] Set Screw is not included when an untapped specification is selected.
[ ! ] Gears with 15 to 18 teeth are only available with straight bore.

Specification Table

Part NumberNumber of TeethBGear ShapePTwisting Direction
HGEARHB1.02510A8LH
HGEARBG1.03810B10RH
HGEARKB1.02310A10LH
 
Part NumberNumber of TeethB
Tooth Width
Gear
Shape
Shaft Bore Dia. PH7
(1 mm Increments)
Twisting
Direction
d
Reference Circle
Dia.
D
Addendum Circle
Dia.
G
Dedendum Circle
Dia.
HL12M
(Coarse)
*1 Allowable Torque (N⋅m)
TypeModuleStraight Bore
Straight Bore + Tap
Keyway
Keyway + Tap
Bending StrengthTooth Surface Strength
Straight Bore
(Shape A, Shape B)
HGEARHB
HGEARHBB
HGEARHBG



Straight Bore + Tap
(Shape B)
HGEARB
HGEARBB
HGEARBG



Keyway
(Shape A)
Keyway + Tap
(Shape B)
HGEARKB
HGEARKBB
HGEARKBG
1.01510A6 to 8LH (Left)

RH (Right)
15.9217.9213.424.490.27
1616.9818.9814.484.960.32
176 to 1018.0420.0415.545.440.36
1819.1021.1016.605.930.42
19A

B
820.1622.1617.661620105M46.430.50
2021.2223.2218.72166.930.56
2122.2824.2819.78177.430.63
228 to 138·1023.3425.3420.84187.950.70
2324.4026.4021.90198.460.77
2425.4627.4622.96208.980.85
258 to 1226.5328.5324.03229.510.94
268 to 1527.5929.5925.092310.041.03
2728.6530.6526.152410.571.12
288 to 1529.7131.7127.212511.111.22
298 to 1830.7732.7728.272611.641.32
3031.8333.8329.332712.181.43
3233.9535.9531.452913.271.67
338 to 1735.0137.0132.513013.821.79
3436.0838.0833.583114.371.92
358 to 2537.1439.1434.643214.922.05
3638.2040.2035.703315.482.19
3840.3242.3237.823516.592.48
3941.3843.3838.883617.152.64
4042.4444.4439.943717.712.79
428 to 2644.5646.5642.064018.833.13
4446.6948.6944.194219.963.49
4547.7549.7545.254320.533.67
4648.8150.8146.314421.103.87
4810 to 3210 to 3050.9352.9348.434622.234.27
4951.9953.9949.494722.804.48
5010 to 3410 to 3253.0555.0550.554823.374.69
5154.1156.1151.614923.944.91
5255.1757.1752.675024.525.14
5457.3059.3054.805225.665.61
5558.3660.3655.865326.245.85
5659.4261.4256.925426.816.10
5760.4862.4857.985527.396.36
5861.5463.5459.045727.966.62
6012 to 3812 to 3663.6665.6661.1659M529.127.16
6265.7867.7863.286130.277.73
6366.8568.8564.356230.858.02
6467.9169.9165.416331.438.32
6568.9770.9766.476432.018.63
6670.0372.0367.536532.598.94
6872.1574.1569.656733.759.58
6973.2175.2170.716834.339.91
 
Part NumberNumber of TeethB
Tooth Width
Gear
Shape
Shaft Bore Dia. PH7
(1 mm Increments)
Twisting
Direction
d
Reference Circle
Dia.
D
Addendum Circle
Dia.
G
Dedendum Circle
Dia.
HL12M
(Coarse)
*1 Allowable Torque (N⋅m)
TypeModuleStraight Bore
Straight Bore + Tap
Keyway
Keyway + Tap
Bending StrengthTooth Surface Strength
Straight Bore
(Shape A, Shape B)
HGEARHB
HGEARHBB
HGEARHBG



Straight Bore + Tap
(Shape B)
HGEARB
HGEARBB
HGEARBG



Keyway
(Shape A)
Keyway + Tap
(Shape B)
HGEARKB
HGEARKBB
HGEARKBG
1.07010A

B
12 to 4412 to 42LH (Left)

RH (Right)
74.2776.2771.776920105M534.9110.25
7276.3978.3973.897036.0810.94
7579.5881.5877.0837.8312.03
7680.6482.6478.1438.4112.41
7781.7083.7079.2038.9912.79
7882.7684.7680.2639.5813.18
8012 to 4812 to 4684.8886.8882.3840.7513.98
8185.9487.9483.4441.3314.39
8489.1391.1386.6343.0915.66
8590.1992.1987.6943.6716.09
8893.3795.3790.8745.4317.44
9095.4997.4992.9946.6018.38
9196.5598.5594.0547.1918.86
9297.6299.6295.1247.7819.34
95100.80102.8098.3049.5420.84
96101.86103.8699.3650.1321.35
98103.98105.98101.4851.3022.40
99105.04107.04102.5451.8922.93
10012 to 5012 to 48106.10108.10103.6052.4823.47
11012 to 5812 to 50116.71118.71114.2158.3729.29
120127.32129.32124.8264.2735.84
[ ! ] Shaft Bore Dia. 9 is not available for Keyway + Tap.
[!] The tooth trace is twisted, generating thrust. Design the bearing to be able to withstand axial thrust.
[!] Helical gears engage with the same helix angle with right and left twisting. Please bear this in mind when selecting as part of a set.
*1 Allowable Transmission Forces in the table are reference values calculated with prescribed conditions.

Alterations

AlterationsSide Through HoleSide Tapped HoleSide Counterbored
CodeKSC·KFC·KTCQSC·QFC·QTCZFC·ZTC
Spec.
Machines through holes on the side surface.
Dimension IncrementsKFC·KTC: 1 mm Increments
 K: 0.5 mm Increments
K selection K3.0 to K6.0
Ordering Code KFC20-K3.5
Applicable Conditions
Shape A
[ ! ]P+K+4 ≤ KSC (KFC/KTC) ≤ G−K−4


Shape B
Standard conditions

[ ! ]P+K+4 ≤ KSC (KFC/KTC) ≤ H−K−4

 

[ ! ]H+K+4 ≤ KSC (KFC/KTC) ≤ G−K−4

 

·Number of Holes

·Hole Position



[!] Conditions may vary depending on the shaft bore specs.
Machines tapped holes on the side surface of the gear
Dimension IncrementsQFC,QTC: 1 mm Increments
Select M M3, M4, M5, M6[ ! ] Tapped Hole Depth M × 2.0
 (When B < M × 2.0, through)
Applicable Conditions
Shape A
Ordering CodeQFC25−M3
Standard conditions

[ ! ]P+M+4 ≤ QSC (QFC/QTC) ≤ G−M−4

Shape B

Ordering CodeR-side specification: QFC25-M3-RR,
L-side specification: QFC25-M3-LL
Standard conditions

[ ! ]P+M+4 ≤ QSC (QFC/QTC) ≤ H−M−4

 

[ ! ]H+M+4 ≤ QSC (QFC/QTC) ≤ G−M−4

·Number of Holes

·Hole Position


[!] Conditions may vary depending on the shaft bore specs.
Machines counterbored holes on the side surface.
Dimension IncrementsZFC,ZTC: 1 mm Increments
Select U U3, U4, U5, U6

Applicable Conditions
Shape A
Ordering Code ZFC20-U3
Standard conditions

[ ! ]P+Ux2+3 ≤ ZFC (ZTC) ≤ G−Ux2−4

U SelectionU₁U₂F
36.53.53.5
484.54.5
59.55.55.5
6116.56.5
Shape B
Ordering CodeR-side specification: ZFC20−U3−RR,
L-side specification: ZFC20−U3−LL
Standard conditions

[ ! ]P+Ux2+3 ≤ ZFC (ZTC) ≤ H−Ux2−4

 

[ ! ]H+Ux2+4 ≤ ZFC (ZTC) ≤ G−Ux2−4

·Number of Holes

·Hole Position

[!] Conditions may vary depending on the shaft bore specs.

Part Number:  

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Part Number
HGEARB1.0-19-10-B-[6-10/1]-[LH,​RH]
HGEARB1.0-20-10-B-[6-10/1]-[LH,​RH]
HGEARB1.0-21-10-B-[6-10/1]-[LH,​RH]
HGEARB1.0-22-10-B-[8-13/1]-[LH,​RH]
HGEARB1.0-23-10-B-[8-13/1]-[LH,​RH]
HGEARB1.0-24-10-B-[8-13/1]-[LH,​RH]
HGEARB1.0-25-10-B-[8-13/1]-[LH,​RH]
HGEARB1.0-26-10-B-[8-15/1]-[LH,​RH]
HGEARB1.0-27-10-B-[8-15/1]-[LH,​RH]
HGEARB1.0-28-10-B-[8-15/1]-[LH,​RH]
HGEARB1.0-29-10-B-[8-18/1]-[LH,​RH]
HGEARB1.0-30-10-B-[8-18/1]-[LH,​RH]
HGEARB1.0-32-10-B-[8-18/1]-[LH,​RH]
HGEARB1.0-33-10-B-[8-18/1]-[LH,​RH]
HGEARB1.0-34-10-B-[8-18/1]-[LH,​RH]
HGEARB1.0-35-10-B-[8-25/1]-[LH,​RH]
HGEARB1.0-36-10-B-[8-25/1]-[LH,​RH]
HGEARB1.0-38-10-B-[8-25/1]-[LH,​RH]
HGEARB1.0-39-10-B-[8-25/1]-[LH,​RH]
HGEARB1.0-40-10-B-[8-25/1]-[LH,​RH]
HGEARB1.0-42-10-B-[8-25/1]-[LH,​RH]
HGEARB1.0-44-10-B-[8-25/1]-[LH,​RH]
HGEARB1.0-45-10-B-[8-25/1]-[LH,​RH]
HGEARB1.0-46-10-B-[8-25/1]-[LH,​RH]
HGEARB1.0-48-10-B-[10-32/1]-[LH,​RH]
HGEARB1.0-49-10-B-[10-32/1]-[LH,​RH]
HGEARB1.0-50-10-B-[10-34/1]-[LH,​RH]
HGEARB1.0-51-10-B-[10-34/1]-[LH,​RH]
HGEARB1.0-52-10-B-[10-34/1]-[LH,​RH]
HGEARB1.0-54-10-B-[10-34/1]-[LH,​RH]
HGEARB1.0-55-10-B-[10-34/1]-[LH,​RH]
HGEARB1.0-56-10-B-[10-34/1]-[LH,​RH]
HGEARB1.0-57-10-B-[10-34/1]-[LH,​RH]
HGEARB1.0-58-10-B-[10-34/1]-[LH,​RH]
HGEARB1.0-60-10-B-[12-38/1]-[LH,​RH]
HGEARB1.0-62-10-B-[12-38/1]-[LH,​RH]
HGEARB1.0-63-10-B-[12-38/1]-[LH,​RH]
HGEARB1.0-64-10-B-[12-38/1]-[LH,​RH]
HGEARB1.0-65-10-B-[12-38/1]-[LH,​RH]
HGEARB1.0-66-10-B-[12-38/1]-[LH,​RH]
HGEARB1.0-68-10-B-[12-38/1]-[LH,​RH]
HGEARB1.0-69-10-B-[12-38/1]-[LH,​RH]
HGEARB1.0-70-10-B-[12-44/1]-[LH,​RH]
HGEARB1.0-72-10-B-[12-44/1]-[LH,​RH]
HGEARB1.0-75-10-B-[12-44/1]-[LH,​RH]
HGEARB1.0-76-10-B-[12-44/1]-[LH,​RH]
HGEARB1.0-77-10-B-[12-44/1]-[LH,​RH]
HGEARB1.0-78-10-B-[12-44/1]-[LH,​RH]
HGEARB1.0-80-10-B-[12-48/1]-[LH,​RH]
HGEARB1.0-81-10-B-[12-48/1]-[LH,​RH]
HGEARB1.0-84-10-B-[12-48/1]-[LH,​RH]
HGEARB1.0-85-10-B-[12-48/1]-[LH,​RH]
HGEARB1.0-88-10-B-[12-48/1]-[LH,​RH]
HGEARB1.0-90-10-B-[12-48/1]-[LH,​RH]
HGEARB1.0-91-10-B-[12-48/1]-[LH,​RH]
HGEARB1.0-92-10-B-[12-48/1]-[LH,​RH]
HGEARB1.0-95-10-B-[12-48/1]-[LH,​RH]
HGEARB1.0-96-10-B-[12-48/1]-[LH,​RH]
HGEARB1.0-98-10-B-[12-48/1]-[LH,​RH]
HGEARB1.0-99-10-B-[12-48/1]-[LH,​RH]
Part Number
Standard Unit Price
Minimum order quantityVolume Discount
Standard
Shipping Days
?
Number of Teeth
(Teeth)
Twisting Direction Surface Treatment Shaft Bore Config. Shaft Bore Dia., Shaft Dia. Gear Shape

-

1 7 Days 19Right / LeftNot ProvidedRound hole+tap6 ~ 10Shape B

-

1 7 Days 20Right / LeftNot ProvidedRound hole+tap6 ~ 10Shape B

-

1 7 Days 21Right / LeftNot ProvidedRound hole+tap6 ~ 10Shape B

-

1 7 Days 22Right / LeftNot ProvidedRound hole+tap8 ~ 13Shape B

-

1 7 Days 23Right / LeftNot ProvidedRound hole+tap8 ~ 13Shape B

-

1 7 Days 24Right / LeftNot ProvidedRound hole+tap8 ~ 13Shape B

-

1 7 Days 25Right / LeftNot ProvidedRound hole+tap8 ~ 13Shape B

-

1 7 Days 26Right / LeftNot ProvidedRound hole+tap8 ~ 15Shape B

-

1 7 Days 27Right / LeftNot ProvidedRound hole+tap8 ~ 15Shape B

-

1 7 Days 28Right / LeftNot ProvidedRound hole+tap8 ~ 15Shape B

-

1 7 Days 29Right / LeftNot ProvidedRound hole+tap8 ~ 18Shape B

-

1 7 Days 30Right / LeftNot ProvidedRound hole+tap8 ~ 18Shape B

-

1 7 Days 32Right / LeftNot ProvidedRound hole+tap8 ~ 18Shape B

-

1 7 Days 33Right / LeftNot ProvidedRound hole+tap8 ~ 18Shape B

-

1 7 Days 34Right / LeftNot ProvidedRound hole+tap8 ~ 18Shape B

-

1 7 Days 35Right / LeftNot ProvidedRound hole+tap8 ~ 25Shape B

-

1 7 Days 36Right / LeftNot ProvidedRound hole+tap8 ~ 25Shape B

-

1 7 Days 38Right / LeftNot ProvidedRound hole+tap8 ~ 25Shape B

-

1 7 Days 39Right / LeftNot ProvidedRound hole+tap8 ~ 25Shape B

-

1 7 Days 40Right / LeftNot ProvidedRound hole+tap8 ~ 25Shape B

-

1 7 Days 42Right / LeftNot ProvidedRound hole+tap8 ~ 25Shape B

-

1 7 Days 44Right / LeftNot ProvidedRound hole+tap8 ~ 25Shape B

-

1 7 Days 45Right / LeftNot ProvidedRound hole+tap8 ~ 25Shape B

-

1 7 Days 46Right / LeftNot ProvidedRound hole+tap8 ~ 25Shape B

-

1 7 Days 48Right / LeftNot ProvidedRound hole+tap10 ~ 32Shape B

-

1 7 Days 49Right / LeftNot ProvidedRound hole+tap10 ~ 32Shape B

-

1 7 Days 50Right / LeftNot ProvidedRound hole+tap10 ~ 34Shape B

-

1 7 Days 51Right / LeftNot ProvidedRound hole+tap10 ~ 34Shape B

-

1 7 Days 52Right / LeftNot ProvidedRound hole+tap10 ~ 34Shape B

-

1 7 Days 54Right / LeftNot ProvidedRound hole+tap10 ~ 34Shape B

-

1 7 Days 55Right / LeftNot ProvidedRound hole+tap10 ~ 34Shape B

-

1 7 Days 56Right / LeftNot ProvidedRound hole+tap10 ~ 34Shape B

-

1 7 Days 57Right / LeftNot ProvidedRound hole+tap10 ~ 34Shape B

-

1 7 Days 58Right / LeftNot ProvidedRound hole+tap10 ~ 34Shape B

-

1 7 Days 60Right / LeftNot ProvidedRound hole+tap12 ~ 38Shape B

-

1 7 Days 62Right / LeftNot ProvidedRound hole+tap12 ~ 38Shape B

-

1 7 Days 63Right / LeftNot ProvidedRound hole+tap12 ~ 38Shape B

-

1 7 Days 64Right / LeftNot ProvidedRound hole+tap12 ~ 38Shape B

-

1 7 Days 65Right / LeftNot ProvidedRound hole+tap12 ~ 38Shape B

-

1 7 Days 66Right / LeftNot ProvidedRound hole+tap12 ~ 38Shape B

-

1 7 Days 68Right / LeftNot ProvidedRound hole+tap12 ~ 38Shape B

-

1 7 Days 69Right / LeftNot ProvidedRound hole+tap12 ~ 38Shape B

-

1 7 Days 70Right / LeftNot ProvidedRound hole+tap12 ~ 44Shape B

-

1 7 Days 72Right / LeftNot ProvidedRound hole+tap12 ~ 44Shape B

-

1 7 Days 75Right / LeftNot ProvidedRound hole+tap12 ~ 44Shape B

-

1 7 Days 76Right / LeftNot ProvidedRound hole+tap12 ~ 44Shape B

-

1 7 Days 77Right / LeftNot ProvidedRound hole+tap12 ~ 44Shape B

-

1 7 Days 78Right / LeftNot ProvidedRound hole+tap12 ~ 44Shape B

-

1 7 Days 80Right / LeftNot ProvidedRound hole+tap12 ~ 48Shape B

-

1 7 Days 81Right / LeftNot ProvidedRound hole+tap12 ~ 48Shape B

-

1 7 Days 84Right / LeftNot ProvidedRound hole+tap12 ~ 48Shape B

-

1 7 Days 85Right / LeftNot ProvidedRound hole+tap12 ~ 48Shape B

-

1 7 Days 88Right / LeftNot ProvidedRound hole+tap12 ~ 48Shape B

-

1 7 Days 90Right / LeftNot ProvidedRound hole+tap12 ~ 48Shape B

-

1 7 Days 91Right / LeftNot ProvidedRound hole+tap12 ~ 48Shape B

-

1 7 Days 92Right / LeftNot ProvidedRound hole+tap12 ~ 48Shape B

-

1 7 Days 95Right / LeftNot ProvidedRound hole+tap12 ~ 48Shape B

-

1 7 Days 96Right / LeftNot ProvidedRound hole+tap12 ~ 48Shape B

-

1 7 Days 98Right / LeftNot ProvidedRound hole+tap12 ~ 48Shape B

-

1 7 Days 99Right / LeftNot ProvidedRound hole+tap12 ~ 48Shape B

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·When selecting Keyway types,
see the table on the right.
■New JIS (B1301) Keyway Dimensions
Nominaldh7bJS9t Tolerance
88+0.015
0    
3±0.01251.4+0.1
  0
1010
1111+0.018
0    
4±0.01501.8
1212
131352.3
1414
1515
1616
1717
181862.8
1919+0.021
0    
2020
2121
2222
Nominaldh7bJS9t Tolerance
2323+0.021
0    
8±0.01803.3+0.2
  0
2424
2525
2626
2727
2828
2929
3030
3131+0.025
0    
10
3232
3333
3434
3535
3636
3737
3838
 
Nominaldh7bJS9t Tolerance
3939+0.025
0    
12±0.02153.3+0.2
  0
4040
4141
4242
4343
4444
4545143.8
4646
4747
4848
4949
5050

Basic information

Module 1 Environmentally Friendly RoHS compliant (10 substances) Properties / applications Not Applicable
Material EN 1.1191 Equiv. Face Width(mm) 10

Tech Support