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Helical Gear-Straight Bore Type/Straight Bore + Tap/Keyway + Tap/ Pressure Angle 20Deg. (Part Numbers)

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[Features] Screw gears are helical gears that mesh with staggered shafts. Also called spiral gear. Mainly used for transmitting force between shafts. The helix angle is 45°.
[Accuracy] New JIS B 1702-1 class 9 (old JIS B 1702 class 5)
[Material] S45C equivalent (steel, iron), SUS304 (stainless steel), MC nylon (plastic)
[ Surface treatment] Triiron tetroxide film
[Compatible modules] Module 1.0, Module 1.5, Module 2.0, Module 2.5, Module 3.0
[RoHS compliant]
[Additional work available] Additional work on set screws is possible. Masu.
[Other names] Screw gears are a type of helical gear, and are also called spiral gears.

Part Number

Configured Part Number is shown.

Drawing/Specifications
3D Preview
Part Numbers
Catalog

Type			[ M ]Material	[ S ]Surface Treatment	[ A ]Accessories
Straight Bore	Straight Bore+Tap	Keyway+Tap	[ M ]Material	[ S ]Surface Treatment	[ A ]Accessories
NEGHN	NEGTN	NEGKN	S45C Equivalent	-	Set Screw (SCM435,Black Oxide)
NEGHB	NEGTB	NEGKB	S45C Equivalent	Black Oxide	Set Screw (SCM435,Black Oxide)
NEGHS	NEGTS	NEGKS	SUS304	-	Set Screw(SUS304)
NEGHM	NEGTM	-	MC Nylon	-	Set Screw(SUS304)

[ ! ]Set Screw is not included in Un-tapped Type products.
[ ! ]Due to vibrations during transportation, the set screw may become detached from the main body.

Specifications

Part Number	-	No. of Teeth	-	Shaft Bore Dia. P	-	Handedness
NEGHN1.0	-	20	-	10	-	L

Part Number		No. of Teeth	Shaft Bore Dia. P_H7 (1mm Increment)		Twisting Direction	d	D	B	H	L	ℓ
Type	Module	No. of Teeth	Straight Bore Straight Bore+Tap	Keyway + Tap	Twisting Direction	d	D	B	H	L	ℓ
Straight Bore NEGHN NEGHB NEGHG NEGHS NEGHM Straight Bore+Tap NEGTN NEGTB NEGTG NEGTS NEGTM Keyway + Tap NEGKN NEGKB NEGKG NEGKS	1.0	13	6~7	-	L(Left) R(Right)	18.38	20.38	10	15	20	10
		15	6~10	8		21.21	23.21		18
		20	8~16	8~13		28.28	30.28		25
		26	10~20	10~17		36.77	38.77		30
		30	10~25	10~22		42.43	44.43		35
	1.5	10	8	-		21.21	24.21	15	16	25	10
		13	10~14	10~12		27.58	30.58		23
		15	10~16	10~13		31.82	34.82		25
		20	12~20	12~17		42.43	45.43		30
		26	12~30	12~26		55.15	58.15		40
		30	12~33	12~30		63.64	66.64		45
	2.0	10	12~13	12		28.28	32.28	20	22	35	15
		13	12~20	12~17		36.77	40.77		30
		15	12~25	12~22		42.43	46.43		35
		20	15~33	15~30		56.57	60.57		45
		26	20~46	20~44		73.54	77.54		60
		30	20~51	20~47		84.85	88.85		65
	2.5	10	12~17	12~14		35.36	40.36	22	26	38	16
		13	15~25	15~22		45.96	50.96		35
		15	15~30	15~26		53.03	58.03		40
		20	20~46	20~44		70.71	75.71		60
		26	20~56	20~50		91.92	96.92		70
		30	20~65	20~50		106.07	111.07		80
	3.0	10	15~24	15~21		42.43	48.43	25	34	43	18
		13	20~33	20~30		55.15	61.15		45
		15	20~38	20~34		63.64	69.64		50
		20	20~46	20~44		84.85	90.85		60
		26	20~65	20~50		110.31	116.31		80
		30	20~65	20~50		127.28	133.28		90

[ ! ]Shaft Bore diameter 6.35 is available for Straight Bore and Straight Bore + Tap.
[ ! ]Shaft bore dia. 9 is not available for Keyway + Tap.
[ ! ]Select 10K as P dimension if you request keyway width of 4.0mm (height 1.8mm) for Keyway + Tap with shaft bore diameter of 10.
[ ! ]Combine the same handedness (L and L or R and R) for unparallel shafts and different handedness (L and R) for parallel shafts.
[ ! ]Helical gears generate axial thrust on shafts. Choose bearings that can withstand the axial thrust s generated by the gears.

Part Number

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Part Number

Part Number	Minimum order quantity	Volume Discount	Days to Ship	RoHS	Module	Shaft Bore Dia., Shaft Dia.	Number of Teeth (Teeth)	Material	Surface Treatment	Shaft Bore Specifications	Material	Surface Treatment	Twisting Direction

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Basic Information

Heat Treatment	Not Provided	Ground Tooth	Not Provided

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328 Part Numbers

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Completed

Specification/Dimensions

Module
1

1.5

2

2.5

3
Clear
Shaft Bore Dia., Shaft Dia.
6

6.35

7

8

9

10

12
[8-65/1]
Clear
Number of Teeth(Teeth)
10

13

15

20

26

30
Clear
Material
- General Steel
- Stainless Steel
- Plastic
Clear
Surface Treatment
- Not Provided
- Black Oxide
Clear
Shaft Bore Specifications
- Keyway + Tap
- Straight Bore
- Straight Bore + Tap
Clear
Material
- S45C
- SUS304
- MC Nylon
Clear
Surface Treatment
- Black Oxide
- Not Provided
Clear
Twisting Direction
- Left [L]
- Right [R]
Clear
type
- NEGHB
- NEGHM
- NEGHN
- NEGHS
- NEGKB
- NEGKN
- NEGKS
- NEGTB
- NEGTM
- NEGTN
- NEGTS
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

6 Day(s) or Less

9 Day(s) or Less
Clear

Specify Alterations

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

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Helical Gear-Straight Bore Type/Straight Bore + Tap/Keyway + Tap/ Pressure Angle 20Deg. (Part Numbers)

Specifications

Part Number

Basic Information

Configure

Specification/Dimensions

Module

Shaft Bore Dia., Shaft Dia.

Number of Teeth(Teeth)

Material

Surface Treatment

Shaft Bore Specifications

Material

Surface Treatment

Twisting Direction

type

CAD

Days to Ship

Specify Alterations

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Complementary Products

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