Specifications Precision grade JIS Grade N6 (JIS B 1702-1:1998) JIS Grade 2 (JIS B 1702:1976) Heat treatment Normalized, teeth surfaces induction hardened Reference section of gear Rotating plane Core hardness HB225260 Gear teeth Standard full depth Surface hardness HRC5055 Transverse pressure 20 Surface treatment Black oxide except ground surfaces Helix angle 2130' Surface finish Ground Material SCM440 (Alloy steel) Datum reference surface for gear grinding Bore

S1

Module 1

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Catalog No.	Hand of thread	Module	No. of teeth	Bore	Hub dia.	Pitch dia.	Outside dia.	Face width	Hub width	Total length	Shape	Allowable torque (kgfm)		Allowable torque (Nm)		Backlash (mm)	Weight (kgf)	Catalog No.
		m	z	AH7	B	C	D	E	F	G		Bending strength	Surface durability	Bending strength	Surface durability
KHG1-20R [ DXF | DWG | 3D CAD] KHG1-20L [ DXF | DWG | 3D CAD]	R L	1	20	6	17	20	22	8	10	18	S1	0.7939	0.5076	7.785	4.978	0.080.16	0.03	KHG1-20R KHG1-20L
KHG1-22R [ DXF | DWG | 3D CAD] KHG1-22L [ DXF | DWG | 3D CAD]	R L	1	22	8	18	22	24	8	10	18	S1	0.9096	0.626	8.92	6.139	0.080.16	0.04	KHG1-22R KHG1-22L
KHG1-24R [ DXF | DWG | 3D CAD] KHG1-24L [ DXF | DWG | 3D CAD]	R L	1	24	8	20	24	26	8	10	18	S1	1.027	0.7576	10.07	7.429	0.080.16	0.05	KHG1-24R KHG1-24L
KHG1-25R [ DXF | DWG | 3D CAD] KHG1-25L [ DXF | DWG | 3D CAD]	R L	1	25	8	20	25	27	8	10	18	S1	1.087	0.8283	10.66	8.123	0.080.16	0.05	KHG1-25R KHG1-25L
KHG1-28R [ DXF | DWG | 3D CAD] KHG1-28L [ DXF | DWG | 3D CAD]	R L	1	28	8	20	28	30	8	10	18	S1	1.267	1.06	12.42	10.39	0.080.16	0.06	KHG1-28R KHG1-28L
KHG1-30R [ DXF | DWG | 3D CAD] KHG1-30L [ DXF | DWG | 3D CAD]	R L	1	30	10	25	30	32	8	10	18	S1	1.389	1.232	13.62	12.08	0.080.16	0.07	KHG1-30R KHG1-30L
KHG1-32R [ DXF | DWG | 3D CAD] KHG1-32L [ DXF | DWG | 3D CAD]	R L	1	32	10	25	32	34	8	10	18	S1	1.374	1.288	13.47	12.63	0.080.16	0.08	KHG1-32R KHG1-32L
KHG1-35R [ DXF | DWG | 3D CAD] KHG1-35L [ DXF | DWG | 3D CAD]	R L	1	35	10	25	35	37	8	10	18	S1	1.543	1.566	15.13	15.36	0.080.16	0.09	KHG1-35R KHG1-35L
KHG1-36R [ DXF | DWG | 3D CAD] KHG1-36L [ DXF | DWG | 3D CAD]	R L	1	36	10	25	36	38	8	10	18	S1	1.599	1.666	15.68	16.34	0.080.16	0.09	KHG1-36R KHG1-36L
KHG1-40R [ DXF | DWG | 3D CAD] KHG1-40L [ DXF | DWG | 3D CAD]	R L	1	40	10	30	40	42	8	10	18	S1	1.828	2.095	17.93	20.54	0.080.16	0.12	KHG1-40R KHG1-40L
KHG1-44R [ DXF | DWG | 3D CAD] KHG1-44L [ DXF | DWG | 3D CAD]	R L	1	44	10	30	44	46	8	10	18	S1	2.058	2.576	20.18	25.26	0.080.16	0.14	KHG1-44R KHG1-44L
KHG1-45R [ DXF | DWG | 3D CAD] KHG1-45L [ DXF | DWG | 3D CAD]	R L	1	45	10	30	45	47	8	10	18	S1	2.115	2.705	20.74	26.53	0.080.16	0.14	KHG1-45R KHG1-45L
KHG1-48R [ DXF | DWG | 3D CAD] KHG1-48L [ DXF | DWG | 3D CAD]	R L	1	48	10	30	48	50	8	10	18	S1	2.29	3.111	22.46	30.51	0.080.16	0.16	KHG1-48R KHG1-48L
KHG1-50R [ DXF | DWG | 3D CAD] KHG1-50L [ DXF | DWG | 3D CAD]	R L	1	50	12	35	50	52	8	10	18	S1	2.406	3.398	23.59	33.32	0.080.16	0.18	KHG1-50R KHG1-50L
KHG1-60R [ DXF | DWG | 3D CAD] KHG1-60L [ DXF | DWG | 3D CAD]	R L	1	60	12	40	60	62	8	10	18	S1	2.992	5.037	29.34	49.4	0.1 0.18	0.26	KHG1-60R KHG1-60L
KHG1-70R [ DXF | DWG | 3D CAD] KHG1-70L [ DXF | DWG | 3D CAD]	R L	1	70	12	40	70	72	8	10	18	S1	3.584	7.021	35.15	68.85	0.1 0.18	0.32	KHG1-70R KHG1-70L
KHG1-80R [ DXF | DWG | 3D CAD] KHG1-80L [ DXF | DWG | 3D CAD]	R L	1	80	15	50	80	82	8	10	18	S1	4.18	9.359	40.99	91.78	0.1 0.18	0.44	KHG1-80R KHG1-80L
KHG1-90R [ DXF | DWG | 3D CAD] KHG1-90L [ DXF | DWG | 3D CAD]	R L	1	90	15	50	90	92	8	10	18	S1	4.778	12.06	46.86	118.3	0.1 0.18	0.53	KHG1-90R KHG1-90L
KHG1-100R [ DXF | DWG | 3D CAD] KHG1-100L [ DXF | DWG | 3D CAD]	R L	1	100	15	50	100	102	8	10	18	S1	5.144	14.47	50.44	141.9	0.1 0.18	0.62	KHG1-100R KHG1-100L

CAUTION: Right handed and left handed helical gears in the same module are designed to mesh as a pair, but they are not interchangeable with SH type helical gears.

NOTE: It is possible to perform secondary operations except on the tooth surfaces. Please exercise caution not to introduce bore and face runouts.

NOTE: The allowable torques shown in the table are calculated values according to JGMA Standards 401-01 and 402-01.The backlash values shown in the table are the theoretical values of a pair of identical gears in mesh. All dimensions shown in the above table(s) are listed in millimeters unless otherwise specified.

USEFUL HINT: Because these gears are not produced using the axial module, they are interchangeable with a pair of spur gears with the same center distance. The change to helical gears will result in reduction of gear noise and increase in gear strength.