Helical Gears - Module 2.0, Shaft Bore Configurable Type

Helical Gears - Module 2.0, 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 1.0Module 1.5Module 2.5Module 3.0

(i)Remark

  • The tooth shape in the 3D drawing is not generated with CAD data download. Refer to the reference circle on the 3D drawing for more information.

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
Module2.0
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.

Specification Table

Part NumberNumber of TeethBGear ShapePTwisting Direction
HGEARHB2.02520A10LH
HGEARBG2.03820B20RH
HGEARKB2.01820A12LH
 
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
2.01520A

B
8 to 158 to 12LH (Left)

RH (Right)
31.8335.8326.832234147M435.952.47
168 to 1633.9537.9528.952439.722.88
178 to 198 to 1436.0840.0831.082743.563.32
188 to 218 to 1638.2042.2033.202947.463.80
198 to 1740.3244.3235.323151.414.54
208 to 238 to 1842.4446.4437.443355.425.13
218 to 1944.5648.5639.563559.475.76
228 to 258 to 2146.6950.6941.693763.576.43
238 to 2248.8152.8143.813967.707.14
248 to 288 to 2350.9354.9345.934171.877.90
2553.0557.0548.054476.078.70
268 to 308 to 2755.1759.1750.174680.309.54
278 to 338 to 3057.3061.3052.304884.5610.44
2859.4263.4254.425088.8411.37
298 to 358 to 3161.5465.5456.545293.1512.36
308 to 368 to 3263.6667.6658.665497.4813.39
328 to 388 to 3367.9171.9162.9158106.1915.60
3370.0374.0365.0361110.5816.78
3410 to 3810 to 3372.1576.1567.1563M5114.9818.01
3510 to 4010 to 3574.2778.2769.2765119.3919.28
3610 to 4310 to 3776.3980.3971.3967123.8320.61
3880.6484.6475.6470132.7323.42
3982.7686.7677.76137.2024.91
4010 to 4810 to 4084.8888.8879.88141.6826.44
4289.1393.1384.13150.6729.67
4493.3797.3788.37159.7033.12
4595.4999.4990.49164.2334.92
4697.62101.6292.62168.7636.78
4810 to 5010 to 42101.86105.8696.86177.8640.67
49103.98107.9898.98182.4242.69
50106.10110.10101.10186.9844.78
5112 to 5210 to 44108.23112.23103.23M6191.5546.92
52110.35114.35105.35196.1349.11
54114.59118.59109.59205.3053.68
55116.71120.71111.71209.9056.05
56118.84122.84113.84214.5058.48
57120.96124.96115.96219.1060.97
58123.08127.08118.08223.7163.52
60127.32131.32122.32232.9468.79
6215 to 5215 to 44131.57135.57126.57242.1974.30
63133.69137.69128.69246.8277.15
64135.81139.81130.81251.4580.06
65137.93141.93132.93256.0883.03
66140.06144.06135.06260.7286.06
68144.30148.30139.30270.0192.31
69146.42150.42141.42274.6695.53
 
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
2.07020A

B
15 to 5215 to 44LH (Left)

RH (Right)
148.54152.54143.547034147M6279.3198.81
72152.79156.79147.79288.62105.56
7520 to 5220 to 44159.16163.16154.16302.61116.15
76161.28165.28156.28307.28119.81
77163.40167.40158.40311.95123.54
78165.52169.52160.52316.62127.33
80169.77173.77164.77325.97135.10
8120 to 5520 to 47171.89175.89166.89330.65139.08
84178.25182.25173.25344.69151.42
85180.38184.38175.38349.37155.67
88186.74190.74181.74363.44168.80
90190.99194.99185.99372.82177.89
91193.11197.11188.11377.52182.54
92195.23199.23190.23382.21187.25
95201.60205.60196.60396.31201.79
96203.72207.72198.72401.01206.77
98207.96211.96202.96410.41216.94
99210.08214.08205.08415.12222.12
100212.21216.21207.21419.83227.38
[ ! ] 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
HGEARBB2.0-15-20-B-[8-15/1]-[LH,​RH]
HGEARBB2.0-16-20-B-[8-16/1]-[LH,​RH]
HGEARBB2.0-17-20-B-[8-19/1]-[LH,​RH]
HGEARBB2.0-18-20-B-[8-21/1]-[LH,​RH]
HGEARBB2.0-19-20-B-[8-21/1]-[LH,​RH]
HGEARBB2.0-20-20-B-[8-23/1]-[LH,​RH]
HGEARBB2.0-21-20-B-[8-23/1]-[LH,​RH]
HGEARBB2.0-22-20-B-[8-25/1]-[LH,​RH]
HGEARBB2.0-23-20-B-[8-25/1]-[LH,​RH]
HGEARBB2.0-24-20-B-[8-28/1]-[LH,​RH]
HGEARBB2.0-25-20-B-[8-28/1]-[LH,​RH]
HGEARBB2.0-26-20-B-[8-30/1]-[LH,​RH]
HGEARBB2.0-27-20-B-[8-33/1]-[LH,​RH]
HGEARBB2.0-28-20-B-[8-33/1]-[LH,​RH]
HGEARBB2.0-29-20-B-[8-35/1]-[LH,​RH]
HGEARBB2.0-30-20-B-[8-36/1]-[LH,​RH]
HGEARBB2.0-32-20-B-[8-38/1]-[LH,​RH]
HGEARBB2.0-33-20-B-[8-38/1]-[LH,​RH]
HGEARBB2.0-34-20-B-[10-38/1]-[LH,​RH]
HGEARBB2.0-35-20-B-[10-40/1]-[LH,​RH]
HGEARBB2.0-36-20-B-[10-43/1]-[LH,​RH]
HGEARBB2.0-38-20-B-[10-43/1]-[LH,​RH]
HGEARBB2.0-39-20-B-[10-43/1]-[LH,​RH]
HGEARBB2.0-40-20-B-[10-48/1]-[LH,​RH]
HGEARBB2.0-42-20-B-[10-48/1]-[LH,​RH]
HGEARBB2.0-44-20-B-[10-48/1]-[LH,​RH]
HGEARBB2.0-45-20-B-[10-48/1]-[LH,​RH]
HGEARBB2.0-46-20-B-[10-48/1]-[LH,​RH]
HGEARBB2.0-48-20-B-[10-50/1]-[LH,​RH]
HGEARBB2.0-49-20-B-[10-50/1]-[LH,​RH]
HGEARBB2.0-50-20-B-[10-50/1]-[LH,​RH]
HGEARBB2.0-51-20-B-[12-52/1]-[LH,​RH]
HGEARBB2.0-52-20-B-[12-52/1]-[LH,​RH]
HGEARBB2.0-54-20-B-[12-52/1]-[LH,​RH]
HGEARBB2.0-55-20-B-[12-52/1]-[LH,​RH]
HGEARBB2.0-56-20-B-[12-52/1]-[LH,​RH]
HGEARBB2.0-57-20-B-[12-52/1]-[LH,​RH]
HGEARBB2.0-58-20-B-[12-52/1]-[LH,​RH]
HGEARBB2.0-60-20-B-[12-52/1]-[LH,​RH]
HGEARBB2.0-62-20-B-[15-52/1]-[LH,​RH]
HGEARBB2.0-63-20-B-[15-52/1]-[LH,​RH]
HGEARBB2.0-64-20-B-[15-52/1]-[LH,​RH]
HGEARBB2.0-65-20-B-[15-52/1]-[LH,​RH]
HGEARBB2.0-66-20-B-[15-52/1]-[LH,​RH]
HGEARBB2.0-68-20-B-[15-52/1]-[LH,​RH]
HGEARBB2.0-69-20-B-[15-52/1]-[LH,​RH]
HGEARBB2.0-70-20-B-[15-52/1]-[LH,​RH]
HGEARBB2.0-72-20-B-[15-52/1]-[LH,​RH]
HGEARBB2.0-75-20-B-[20-52/1]-[LH,​RH]
HGEARBB2.0-76-20-B-[20-52/1]-[LH,​RH]
HGEARBB2.0-77-20-B-[20-52/1]-[LH,​RH]
HGEARBB2.0-78-20-B-[20-52/1]-[LH,​RH]
HGEARBB2.0-80-20-B-[20-52/1]-[LH,​RH]
HGEARBB2.0-81-20-B-[20-55/1]-[LH,​RH]
HGEARBB2.0-84-20-B-[20-55/1]-[LH,​RH]
HGEARBB2.0-85-20-B-[20-55/1]-[LH,​RH]
HGEARBB2.0-88-20-B-[20-55/1]-[LH,​RH]
HGEARBB2.0-90-20-B-[20-55/1]-[LH,​RH]
HGEARBB2.0-91-20-B-[20-55/1]-[LH,​RH]
HGEARBB2.0-92-20-B-[20-55/1]-[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 15Right / LeftBlack OxideRound hole+tap8 ~ 15Shape B

-

1 7 Days 16Right / LeftBlack OxideRound hole+tap8 ~ 16Shape B

-

1 7 Days 17Right / LeftBlack OxideRound hole+tap8 ~ 19Shape B

-

1 7 Days 18Right / LeftBlack OxideRound hole+tap8 ~ 21Shape B

-

1 7 Days 19Right / LeftBlack OxideRound hole+tap8 ~ 21Shape B

-

1 7 Days 20Right / LeftBlack OxideRound hole+tap8 ~ 23Shape B

-

1 7 Days 21Right / LeftBlack OxideRound hole+tap8 ~ 23Shape B

-

1 7 Days 22Right / LeftBlack OxideRound hole+tap8 ~ 25Shape B

-

1 7 Days 23Right / LeftBlack OxideRound hole+tap8 ~ 25Shape B

-

1 7 Days 24Right / LeftBlack OxideRound hole+tap8 ~ 28Shape B

-

1 7 Days 25Right / LeftBlack OxideRound hole+tap8 ~ 28Shape B

-

1 7 Days 26Right / LeftBlack OxideRound hole+tap8 ~ 30Shape B

-

1 7 Days 27Right / LeftBlack OxideRound hole+tap8 ~ 33Shape B

-

1 7 Days 28Right / LeftBlack OxideRound hole+tap8 ~ 33Shape B

-

1 7 Days 29Right / LeftBlack OxideRound hole+tap8 ~ 35Shape B

-

1 7 Days 30Right / LeftBlack OxideRound hole+tap8 ~ 36Shape B

-

1 7 Days 32Right / LeftBlack OxideRound hole+tap8 ~ 38Shape B

-

1 7 Days 33Right / LeftBlack OxideRound hole+tap8 ~ 38Shape B

-

1 7 Days 34Right / LeftBlack OxideRound hole+tap10 ~ 38Shape B

-

1 7 Days 35Right / LeftBlack OxideRound hole+tap10 ~ 40Shape B

-

1 7 Days 36Right / LeftBlack OxideRound hole+tap10 ~ 43Shape B

-

1 7 Days 38Right / LeftBlack OxideRound hole+tap10 ~ 43Shape B

-

1 7 Days 39Right / LeftBlack OxideRound hole+tap10 ~ 43Shape B

-

1 7 Days 40Right / LeftBlack OxideRound hole+tap10 ~ 48Shape B

-

1 7 Days 42Right / LeftBlack OxideRound hole+tap10 ~ 48Shape B

-

1 7 Days 44Right / LeftBlack OxideRound hole+tap10 ~ 48Shape B

-

1 7 Days 45Right / LeftBlack OxideRound hole+tap10 ~ 48Shape B

-

1 7 Days 46Right / LeftBlack OxideRound hole+tap10 ~ 48Shape B

-

1 7 Days 48Right / LeftBlack OxideRound hole+tap10 ~ 50Shape B

-

1 7 Days 49Right / LeftBlack OxideRound hole+tap10 ~ 50Shape B

-

1 7 Days 50Right / LeftBlack OxideRound hole+tap10 ~ 50Shape B

-

1 7 Days 51Right / LeftBlack OxideRound hole+tap12 ~ 52Shape B

-

1 7 Days 52Right / LeftBlack OxideRound hole+tap12 ~ 52Shape B

-

1 7 Days 54Right / LeftBlack OxideRound hole+tap12 ~ 52Shape B

-

1 7 Days 55Right / LeftBlack OxideRound hole+tap12 ~ 52Shape B

-

1 7 Days 56Right / LeftBlack OxideRound hole+tap12 ~ 52Shape B

-

1 7 Days 57Right / LeftBlack OxideRound hole+tap12 ~ 52Shape B

-

1 7 Days 58Right / LeftBlack OxideRound hole+tap12 ~ 52Shape B

-

1 7 Days 60Right / LeftBlack OxideRound hole+tap12 ~ 52Shape B

-

1 7 Days 62Right / LeftBlack OxideRound hole+tap15 ~ 52Shape B

-

1 7 Days 63Right / LeftBlack OxideRound hole+tap15 ~ 52Shape B

-

1 7 Days 64Right / LeftBlack OxideRound hole+tap15 ~ 52Shape B

-

1 7 Days 65Right / LeftBlack OxideRound hole+tap15 ~ 52Shape B

-

1 7 Days 66Right / LeftBlack OxideRound hole+tap15 ~ 52Shape B

-

1 7 Days 68Right / LeftBlack OxideRound hole+tap15 ~ 52Shape B

-

1 7 Days 69Right / LeftBlack OxideRound hole+tap15 ~ 52Shape B

-

1 7 Days 70Right / LeftBlack OxideRound hole+tap15 ~ 52Shape B

-

1 7 Days 72Right / LeftBlack OxideRound hole+tap15 ~ 52Shape B

-

1 7 Days 75Right / LeftBlack OxideRound hole+tap20 ~ 52Shape B

-

1 7 Days 76Right / LeftBlack OxideRound hole+tap20 ~ 52Shape B

-

1 7 Days 77Right / LeftBlack OxideRound hole+tap20 ~ 52Shape B

-

1 7 Days 78Right / LeftBlack OxideRound hole+tap20 ~ 52Shape B

-

1 7 Days 80Right / LeftBlack OxideRound hole+tap20 ~ 52Shape B

-

1 7 Days 81Right / LeftBlack OxideRound hole+tap20 ~ 55Shape B

-

1 7 Days 84Right / LeftBlack OxideRound hole+tap20 ~ 55Shape B

-

1 7 Days 85Right / LeftBlack OxideRound hole+tap20 ~ 55Shape B

-

1 7 Days 88Right / LeftBlack OxideRound hole+tap20 ~ 55Shape B

-

1 7 Days 90Right / LeftBlack OxideRound hole+tap20 ~ 55Shape B

-

1 7 Days 91Right / LeftBlack OxideRound hole+tap20 ~ 55Shape B

-

1 7 Days 92Right / LeftBlack OxideRound hole+tap20 ~ 55Shape 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 2 Environmentally Friendly RoHS compliant (10 substances) Properties / applications Not Applicable
Material EN 1.1191 Equiv. Face Width(mm) 20

Tech Support