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 3

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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
KHG3-15R [DXF | DWG | 3D CAD] KHG3-15L [ DXF | DWG | 3D CAD]	R L	3	15	18	36	45	51	25	16	41	S1	13.18	7.616	129.3	74.69	0.1 0.2	0.36	KHG3-15R KHG3-15L
KHG3-16R [DXF | DWG | 3D CAD] KHG3-16L [ DXF | DWG | 3D CAD]	R L	3	16	18	38	48	54	25	16	41	S1	14.57	8.888	142.9	87.16	0.1 0.2	0.42	KHG3-16R KHG3-16L
KHG3-18R [DXF | DWG | 3D CAD] KHG3-18L [ DXF | DWG | 3D CAD]	R L	3	18	18	40	54	60	25	16	41	S1	17.4	11.76	170.6	115.3	0.120.22	0.53	KHG3-18R KHG3-18L
KHG3-20R [DXF | DWG | 3D CAD] KHG3-20L [ DXF | DWG | 3D CAD]	R L	3	20	20	50	60	66	25	16	41	S1	20.3	15.09	199.1	148	0.120.22	0.7	KHG3-20R KHG3-20L
KHG3-22R [DXF | DWG | 3D CAD] KHG3-22L [ DXF | DWG | 3D CAD]	R L	3	22	20	54	66	72	25	16	41	S1	23.26	18.77	228.1	184.1	0.120.22	0.86	KHG3-22R KHG3-22L
KHG3-24R [DXF | DWG | 3D CAD] KHG3-24L [ DXF | DWG | 3D CAD]	R L	3	24	20	58	72	78	25	16	41	S1	26.26	22.82	257.5	223.8	0.120.22	1	KHG3-24R KHG3-24L
KHG3-25R [DXF | DWG | 3D CAD] KHG3-25L [ DXF | DWG | 3D CAD]	R L	3	25	20	60	75	81	25	16	41	S1	27.78	25	272.4	245.2	0.120.22	1.1	KHG3-25R KHG3-25L
KHG3-26R [DXF | DWG | 3D CAD] KHG3-26L [ DXF | DWG | 3D CAD]	R L	3	26	20	60	78	84	25	16	41	S1	29.31	27.3	287.4	267.7	0.120.22	1.2	KHG3-26R KHG3-26L
KHG3-28R [DXF | DWG | 3D CAD] KHG3-28L [ DXF | DWG | 3D CAD]	R L	3	28	20	70	84	90	25	16	41	S1	32.39	32.23	317.6	316.1	0.120.22	1.5	KHG3-28R KHG3-28L
KHG3-30R [DXF | DWG | 3D CAD] KHG3-30L [ DXF | DWG | 3D CAD]	R L	3	30	25	75	90	96	25	16	41	S1	35.5	37.6	348.1	368.7	0.120.22	1.6	KHG3-30R KHG3-30L
KHG3-32R [DXF | DWG | 3D CAD] KHG3-32L [ DXF | DWG | 3D CAD]	R L	3	32	25	75	96	102	25	16	41	S1	36.96	41.54	362.5	407.4	0.120.22	1.8	KHG3-32R KHG3-32L
KHG3-35R [DXF | DWG | 3D CAD] KHG3-35L [ DXF | DWG | 3D CAD]	R L	3	35	25	80	105	111	25	16	41	S1	41.5	50.74	407	497.6	0.140.26	2.2	KHG3-35R KHG3-35L
KHG3-36R [DXF | DWG | 3D CAD] KHG3-36L [ DXF | DWG | 3D CAD]	R L	3	36	25	80	108	114	25	16	41	S1	43.03	54.03	422	529.8	0.140.26	2.3	KHG3-36R KHG3-36L
KHG3-40R [DXF | DWG | 3D CAD] KHG3-40L [ DXF | DWG | 3D CAD]	R L	3	40	25	80	120	126	25	16	41	S1	49.16	68.33	482.1	670.1	0.140.26	2.7	KHG3-40R KHG3-40L
KHG3-44R [DXF | DWG | 3D CAD] KHG3-44L [ DXF | DWG | 3D CAD]	R L	3	44	25	80	132	138	25	16	41	S1	55.36	84.38	542.9	827.5	0.140.26	3.2	KHG3-44R KHG3-44L
KHG3-45R [DXF | DWG | 3D CAD] KHG3-45L [ DXF | DWG | 3D CAD]	R L	3	45	25	80	135	141	25	16	41	S1	56.91	88.63	558.1	869.2	0.140.26	3.3	KHG3-45R KHG3-45L
KHG3-48R [DXF | DWG | 3D CAD] KHG3-48L [ DXF | DWG | 3D CAD]	R L	3	48	25	85	144	150	25	16	41	S1	61.59	102	604	1000	0.140.26	3.8	KHG3-48R KHG3-48L
KHG3-50R [DXF | DWG | 3D CAD] KHG3-50L [ DXF | DWG | 3D CAD]	R L	3	50	30	85	150	156	25	16	41	S1	64.73	111.6	634.8	1094	0.140.26	4	KHG3-50R KHG3-50L
KHG3-52R [DXF | DWG | 3D CAD] KHG3-52L [ DXF | DWG | 3D CAD]	R L	3	52	30	85	156	162	25	16	41	S1	67.87	121.5	665.6	1191	0.140.26	4.2	KHG3-52R KHG3-52L
KHG3-60R [DXF | DWG | 3D CAD] KHG3-60L [ DXF | DWG | 3D CAD]	R L	3	60	30	90	180	186	25	16	41	S1	77.15	159.1	756.6	1560	0.140.26	5.6	KHG3-60R KHG3-60L

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.