Specifications Precision grade JIS Grade N8 (JIS B 1702-1:1998) JIS Grade 4 (JIS B 1702:1976) Core hardness HB165194 Gear teeth Standard full depth Surface hardness Pressure angle 20 Surface treatment Black oxide Material S45C Surface finish Hobbed Heat treatment - Datum reference surface for gear cutting Bore

S5 S6

Module 3

Catalog No.	Module	No. of teeth	Bore	Hub dia.	Pitch dia.	Outside dia.	Face width	Hub width	Web thickness	Web O.D.	Shape	Allowable torque(kgfm)		Allowable torque(Nm)		Backlash (mm)	Weight (kgf)	Catalog No.
	m	z	AH7	B	C	D	E	F	H	I		Bending strength	Surface durability	Bending strength	Surface durability
SSA3-20 [ DXF| DWG| 3D CAD] SSA3-24 [ DXF| DWG| 3D CAD] SSA3-25 [ DXF| DWG| 3D CAD] SSA3-28 [ DXF| DWG| 3D CAD] SSA3-30 [ DXF| DWG| 3D CAD]	3 3 3 3 3	20 24 25 28 30	15 15 15 20 20	- - - - -	60 72 75 84 90	66 78 81 90 96	30 30 30 30 30	- - - - -	- - - - -	- - - - -	S5 S5 S5 S5 S5	15.82 20.56 21.77 25.44 27.92	1.015 1.518 1.662 2.111 2.442	155.1 201.6 213.5 249.5 273.8	9.954 14.89 16.3 20.7 23.95	0.160.32 0.180.38 0.180.38 0.180.38 0.180.38	0.62 0.78 1 1.2 1.4	SSA3-20 SSA3-24 SSA3-25 SSA3-28 SSA3-30
SSA3-32 [ DXF| DWG| 3D CAD] SSA3-35 [ DXF| DWG| 3D CAD] SSA3-36 [ DXF| DWG| 3D CAD] SSA3-40 [ DXF| DWG| 3D CAD] SSA3-45 [ DXF| DWG| 3D CAD]	3 3 3 3 3	32 35 36 40 45	20 20 20 25 25	- - - - -	96 105 108 120 135	102 111 114 126 141	30 30 30 30 30	- - - - -	- - - - -	- - - - -	S5 S5 S5 S5 S5	30.42 34.2 35.47 40.58 47.04	2.798 3.379 3.585 4.486 5.775	298.3 335.4 347.8 397.9 461.3	27.44 33.14 35.16 43.99 56.63	0.180.38 0.180.38 0.180.38 0.180.38 0.220.44	1.6 2 2.1 2.5 3.2	SSA3-32 SSA3-35 SSA3-36 SSA3-40 SSA3-45
SSA3-48 [ DXF| DWG| 3D CAD] SSA3-50 [ DXF| DWG| 3D CAD] SSA3-55 [ DXF| DWG| 3D CAD] SSA3-56 [ DXF| DWG| 3D CAD] SSA3-60 [ DXF| DWG| 3D CAD]	3 3 3 3 3	48 50 55 56 60	25 25 25 25 25	- 70 80 80 90	144 150 165 168 180	150 156 171 174 186	30 30 30 30 30	- 6 6 6 6	- 18 18 18 18	- 116 131 134 146	S5 S6 S6 S6 S6	50.94 53.55 60.11 61.42 66.7	6.629 7.232 8.861 9.208 10.66	499.5 525.1 589.5 602.3 654.1	65.01 70.92 86.9 90.3 104.5	0.220.44 0.220.44 0.220.44 0.220.44 0.220.44	3.7 3.3 4.1 4.2 5.1	SSA3-48 SSA3-50 SSA3-55 SSA3-56 SSA3-60
SSA3-70 [ DXF| DWG| 3D CAD] SSA3-80 [ DXF| DWG| 3D CAD]	3 3	70 80	25 25	90 90	210 240	216 246	30 30	6 6	18 18	176 205	S6 S6	66.64 77.77	12.36 16.48	653.5 762.7	121.2 161.6	0.220.44 0.220.44	6.2 8.5	SSA3-70 SSA3-80

Module 4

Catalog No.	Module	No. of teeth	Bore	Hub dia.	Pitch dia.	Outside dia.	Face width	Hub width	Web thickness	Web O.D.	Shape	Allowable torque(kgfm)		Allowable torque(Nm)		Backlash (mm)	Weight (kgf)	Catalog No.
	m	z	AH7	B	C	D	E	F	H	I		Bending strength	Surface durability	Bending strength	Surface durability
SSA4-20 [ DXF| DWG| 3D CAD] SSA4-24 [ DXF| DWG| 3D CAD] SSA4-25 [ DXF| DWG| 3D CAD] SSA4-28 [ DXF| DWG| 3D CAD] SSA4-30 [ DXF| DWG| 3D CAD]	4 4 4 4 4	20 24 25 28 30	20 20 20 25 25	- - - - -	80 96 100 112 120	88 104 108 120 128	40 40 40 40 40	- - - - -	- - - - -	- - - - -	S5 S5 S5 S5 S5	37.5 48.75 51.61 60.31 66.18	2.478 3.716 4.066 5.16 5.982	367.7 478.1 506.1 591.4 649	24.3 36.44 39.87 50.6 58.66	0.180.38 0.220.44 0.220.44 0.220.44 0.220.44	1.5 2.2 2.4 2.9 3.2	SSA4-20 SSA4-24 SSA4-25 SSA4-28 SSA4-30
SSA4-32 [ DXF| DWG| 3D CAD] SSA4-35 [ DXF| DWG| 3D CAD] SSA4-36 [ DXF| DWG| 3D CAD] SSA4-40 [ DXF| DWG| 3D CAD] SSA4-45 [ DXF| DWG| 3D CAD]	4 4 4 4 4	32 35 36 40 45	25 25 25 30 30	- - - 80 100	128 140 144 160 180	136 148 152 168 188	40 40 40 40 40	- - - 7 7	- - - 26 26	- - - 118 138	S5 S5 S5 S6 S6	72.1 81.07 84.08 96.2 111.5	6.87 8.322 8.838 11.07 14.22	707.1 795 824.5 943.4 1093	67.37 81.61 86.67 108.6 139.4	0.220.44 0.220.44 0.220.44 0.220.44 0.240.52	4.4 5.3 5.6 5.5 7.3	SSA4-32 SSA4-35 SSA4-36 SSA4-40 SSA4-45
SSA4-48 [ DXF| DWG| 3D CAD] SSA4-50 [ DXF| DWG| 3D CAD] SSA4-55 [ DXF| DWG| 3D CAD] SSA4-56 [ DXF| DWG| 3D CAD] SSA4-60 [ DXF| DWG| 3D CAD]	4 4 4 4 4	48 50 55 56 60	30 30 30 30 30	100 100 110 110 120	192 200 220 224 240	200 208 228 232 248	40 40 40 40 40	7 7 7 7 7	26 26 26 26 26	150 158 178 182 198	S6 S6 S6 S6 S6	100.6 105.8 118.7 121.3 131.8	13.59 14.84 18.22 18.94 21.97	986.5 1038 1164 1190 1293	133.3 145.5 178.7 185.7 215.4	0.240.52 0.240.52 0.240.52 0.240.52 0.240.52	8.2 8.8 10 11 13	SSA4-48 SSA4-50 SSA4-55 SSA4-56 SSA4-60

Module 5

Catalog No.	Module	No. of teeth	Bore	Hub dia.	Pitch dia.	Outside dia.	Face width	Hub width	Web thickness	Web O.D.	Shape	Allowable torque(kgfm)		Allowable torque(Nm)		Backlash (mm)	Weight (kgf)	Catalog No.
	m	z	AH7	B	C	D	E	F	H	I		Bending strength	Surface durability	Bending strength	Surface durability
SSA5-20 [ DXF| DWG| 3D CAD] SSA5-24 [ DXF| DWG| 3D CAD] SSA5-25 [ DXF| DWG| 3D CAD] SSA5-28 [ DXF| DWG| 3D CAD] SSA5-30 [ DXF| DWG| 3D CAD]	5 5 5 5 5	20 24 25 28 30	22 22 22 25 25	- - - - -	100 120 125 140 150	110 130 135 150 160	50 50 50 50 50	- - - - -	- - - - -	- - - - -	S5 S5 S5 S5 S5	73.25 95.21 100.8 117.8 129.3	4.959 7.446 8.162 10.4 12.05	718.3 933.7 988.5 1155 1268	48.63 73.02 80.04 102 118.2	0.220.44 0.240.5 0.240.5 0.240.5 0.240.5	2.9 4.2 4.6 5.8 6.6	SSA5-20 SSA5-24 SSA5-25 SSA5-28 SSA5-30
SSA5-32 [ DXF| DWG| 3D CAD] SSA5-35 [ DXF| DWG| 3D CAD] SSA5-36 [ DXF| DWG| 3D CAD] SSA5-40 [ DXF| DWG| 3D CAD] SSA5-45 [ DXF| DWG| 3D CAD]	5 5 5 5 5	32 35 36 40 45	25 25 25 30 30	90 90 90 100 120	160 175 180 200 225	170 185 190 210 235	50 50 50 50 50	7 7 7 7 7	36 36 36 36 36	120 130 140 160 185	S6 S6 S6 S6 S6	140.8 158.3 164.2 156.6 181.5	13.83 16.74 17.77 18.54 23.9	1381 1552 1610 1536 1780	135.6 164.2 174.3 181.8 234.4	0.240.5 0.240.5 0.240.5 0.240.5 0.280.58	8.5 10.2 10.8 11 14	SSA5-32 SSA5-35 SSA5-36 SSA5-40 SSA5-45
SSA5-48 [ DXF| DWG| 3D CAD] SSA5-50 [ DXF| DWG| 3D CAD]	5 5	48 50	30 30	120 130	240 250	250 260	50 50	7 7	36 36	200 210	S6 S6	196.5 206.6	27.46 29.98	1927 2026	269.3 294	0.280.58 0.280.58	15 16	SSA5-48 SSA5-50

CAUTION: When opening the bore to a larger size, please design the maximum bore so that the tooth strength is less than the strength of remaining material. Otherwise the internal stresses on the gear will cause premature failure of the geartrain. The minimum clearance between the bore and the tooth root should be 1.5 times the tooth height.

NOTE: The allowable torques shown in the table are the 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.

 

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