Helical Gears / Pressure Angle 20Deg. / Helix Angle 45Deg.

Type			Material	Surface Treatment	Accessory
Straight Bore	Straight Bore + Tap	Keyway + Tap
NEGHN	NEGTN	NEGKN	EN 1.1191 Equiv.	-	Set Screw (EN 1.7220 Equiv., Black Oxide)
NEGHB	NEGTB	NEGKB		Black Oxide
NEGHS	NEGTS	NEGKS	EN 1.4301 Equiv.	-	Set Screw (EN 1.4301 Equiv.)
NEGHM	NEGTM	-	MC Nylon	-	Set Screw (EN 1.4301 Equiv.)

Set Screw is not included in Un-tapped Type products.

Part Number		Number of Teeth	Shaft Bore Dia. PH7 (1mm Increment)		Twisting Direction	d	D	B	H	L	ℓ
Type	Module		Straight Bore Straight Bore + Tap	Keyway + Tap
Straight Bore NEGHN NEGHB NEGHS NEGHM Straight Bore + Tap NEGTN NEGTB NEGTS NEGTM Keyway + Tap NEGKN NEGKB 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 Dia. 6.35 is available for Straight Bore and Straight Bore + Tap. Specify 10K as P dimension if keyway width of 4.0mm (height 1.8mm) for Keyway + Tap with shaft bore diameter of 10 is desired. >> P.1498
Shaft Bore Dia. 9 is not available for Keyway + Tap. 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 generated by the gears.