Specifications Precision grade JIS Grade N8 (JIS B 1702-1:1998) JIS Grade 4 (JIS B 1702:1976) Heat treatment - Reference section of gear Normal plane Core hardness HB165194 Gear teeth Standard full depth Surface hardness Normal pressure angle 20 Surface treatment Black oxide Helix angle 15 Surface finish Cut Material S45C (Carbon steel) Datum reference surface for gear cutting Bore

S1

Module 2

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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
SH2-15R [DXF | DWG | 3D CAD] SH2-15L [ DXF | DWG | 3D CAD]	R L	2	15	12	24	31.05	35.06	25	10	35	S1	4.458	0.2952	43.72	2.895	0.120.26	0.16	SH2-15R SH2-15L
SH2-20R [DXF | DWG | 3D CAD] SH2-20L [ DXF | DWG | 3D CAD]	R L	2	20	12	32	41.41	45.41	25	10	35	S1	6.843	0.5966	67.11	5.851	0.120.26	0.31	SH2-20R SH2-20L
SH2-30R [DXF | DWG | 3D CAD] SH2-30L [ DXF | DWG | 3D CAD]	R L	2	30	12	50	62.11	66.12	25	10	35	S1	11.91	1.555	116.8	15.25	0.140.3	0.7	SH2-30R SH2-30L
SH2-40R [DXF | DWG | 3D CAD] SH2-40L [ DXF | DWG | 3D CAD]	R L	2	40	18	60	82.82	86.82	25	10	35	S1	17.19	2.949	168.6	28.92	0.140.3	1.2	SH2-40R SH2-40L
SH2-60R [DXF | DWG | 3D CAD] SH2-60L [ DXF | DWG | 3D CAD]	R L	2	60	18	70	124.23	128.23	25	10	35	S1	28.03	7.221	274.9	70.81	0.180.36	3	SH2-60R SH2-60L
SH2-90R [DXF | DWG | 3D CAD] SH2-90L [ DXF | DWG | 3D CAD]	R L	2	90	18	120	186.35	190.35	25	10	35	S1	44.6	17.64	437.4	173	0.180.36	6.1	SH2-90R SH2-90L

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
SH3-15R [DXF | DWG | 3D CAD] SH3-15L [ DXF | DWG | 3D CAD]	R L	3	15	15	36	46.59	52.59	35	15	50	S1	14.04	0.9863	137.7	9.672	0.160.32	0.5	SH3-15R SH3-15L
SH3-20R [DXF | DWG | 3D CAD] SH3-20L [ DXF | DWG | 3D CAD]	R L	3	20	15	50	62.12	68.12	35	15	50	S1	21.55	1.977	211.3	19.39	0.160.32	1	SH3-20R SH3-20L
SH3-30R [DXF | DWG | 3D CAD] SH3-30L [ DXF | DWG | 3D CAD]	R L	3	30	20	70	93.17	99.17	35	15	50	S1	37.51	5.119	367.8	50.2	0.180.38	2.2	SH3-30R SH3-30L
SH3-40R [DXF | DWG | 3D CAD] SH3-40L [ DXF | DWG | 3D CAD]	R L	3	40	20	80	124.23	130.23	35	15	50	S1	54.13	9.734	530.8	95.46	0.180.38	3.8	SH3-40R SH3-40L
SH3-60R [DXF | DWG | 3D CAD] SH3-60L [ DXF | DWG | 3D CAD]	R L	3	60	20	140	186.35	192.35	35	15	50	S1	88.29	24.01	865.8	235.5	0.220.44	9.3	SH3-60R SH3-60L

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 KHG 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: It is recommended that an SRH type rack be used with these pinions when building a rack and pinion set. When using helical gears, the axial thrust force must be taken into consideration. Therefore, choose the bearings that can resist the axial load. For further information, please consult the technical section.

SH Helical Gear Center Distance

SH Helical Gear Center Distance