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

S1 S2 S4

Module 2.5

Catalog No.	No. of teeth	Bore	Hub dia.	Pitch dia.	Outside dia.	Face width	Hub width	Total length	Web thickness	Web O.D.	Shape	Allowable torque(kgfm)		Allowable torque(Nm)		Backlash (mm)	Weight (kgf)	Catalog No.
	z	AH7	B	C	D	E	F	G	H	I		Bending strength	Surface durability	Bending strength	Surface durability
SS2.5-12 [ DXF| DWG| 3D CAD] SS2.5-13 [ DXF| DWG| 3D CAD] SS2.5-14 [ DXF| DWG| 3D CAD] SS2.5-15 [ DXF| DWG| 3D CAD] SS2.5-16 [ DXF| DWG| 3D CAD]	12 13 14 15 16	12 12 12 15 15	23 25 25 30 32	30 32.5 35 37.5 40	35 37.5 40 42.5 45	25 25 25 25 25	12 12 12 12 12	37 37 37 37 37	- - - - -	- - - - -	S1 S1 S1 S1 S1	4.055 4.651 5.263 5.887 6.522	0.1801 0.218 0.2582 0.3022 0.3497	39.77 45.61 51.61 57.73 63.96	1.766 2.138 2.532 2.964 3.429	0.140.28 0.140.28 0.140.28 0.140.28 0.140.28	0.14 0.17 0.2 0.23 0.25	SS2.5-12 SS2.5-13 SS2.5-14 SS2.5-15 SS2.5-16
SS2.5-17 [ DXF| DWG| 3D CAD] SS2.5-18 [ DXF| DWG| 3D CAD] SS2.5-19 [ DXF| DWG| 3D CAD] SS2.5-20 [ DXF| DWG| 3D CAD] SS2.5-21 [ DXF| DWG| 3D CAD]	17 18 19 20 21	15 15 15 15 15	35 38 39 40 42	42.5 45 47.5 50 52.5	47.5 50 52.5 55 57.5	25 25 25 25 25	12 12 12 12 12	37 37 37 37 37	- - - - -	- - - - -	S1 S1 S1 S1 S1	7.168 7.823 8.486 9.156 9.834	0.401 0.4559 0.5145 0.5768 0.6428	70.29 76.72 83.22 89.79 96.44	3.932 4.471 5.045 5.656 6.304	0.140.28 0.140.28 0.140.28 0.140.28 0.160.34	0.28 0.35 0.4 0.44 0.49	SS2.5-17 SS2.5-18 SS2.5-19 SS2.5-20 SS2.5-21
SS2.5-22 [ DXF| DWG| 3D CAD] SS2.5-23 [ DXF| DWG| 3D CAD] SS2.5-24 [ DXF| DWG| 3D CAD] SS2.5-25 [ DXF| DWG| 3D CAD] SS2.5-26 [ DXF| DWG| 3D CAD]	22 23 24 25 26	15 15 15 15 15	44 46 48 50 55	55 57.5 60 62.5 65	60 62.5 65 67.5 70	25 25 25 25 25	12 12 12 12 12	37 37 37 37 37	- - - - -	- - - - -	S1 S1 S1 S1 S1	10.52 11.21 11.9 12.6 13.3	0.7125 0.786 0.8632 0.9442 1.025	103.2 109.9 116.7 123.6 130.4	6.987 7.708 8.465 9.259 10.05	0.160.34 0.160.34 0.160.34 0.160.34 0.160.34	0.53 0.58 0.65 0.7 0.83	SS2.5-22 SS2.5-23 SS2.5-24 SS2.5-25 SS2.5-26
SS2.5-27 [ DXF| DWG| 3D CAD] SS2.5-28 [ DXF| DWG| 3D CAD] SS2.5-29 [ DXF| DWG| 3D CAD] SS2.5-30 [ DXF| DWG| 3D CAD] SS2.5-32 [ DXF| DWG| 3D CAD]	27 28 29 30 32	15 15 15 15 15	60 60 62 65 70	67.5 70 72.5 75 80	72.5 75 77.5 80 85	25 25 25 25 25	12 12 12 12 12	37 37 37 37 37	- - - - -	- - - - -	S1 S1 S1 S1 S1	14.01 14.72 15.44 16.16 17.6	1.109 1.197 1.289 1.385 1.587	137.4 144.4 151.4 158.5 172.6	10.88 11.74 12.64 13.58 15.56	0.160.34 0.160.34 0.160.34 0.160.34 0.160.34	0.92 1 1.1 1.2 1.3	SS2.5-27 SS2.5-28 SS2.5-29 SS2.5-30 SS2.5-32
SS2.5-34 [ DXF| DWG| 3D CAD] SS2.5-35 [ DXF| DWG| 3D CAD] SS2.5-36 [ DXF| DWG| 3D CAD] SS2.5-38 [ DXF| DWG| 3D CAD] SS2.5-40 [ DXF| DWG| 3D CAD]	34 35 36 38 40	15 15 15 20 20	70 70 70 70 70	85 87.5 90 95 100	90 92.5 95 100 105	25 25 25 25 25	12 12 12 12 12	37 37 37 37 37	- - - - -	- - - - -	S1 S1 S1 S1 S1	19.06 19.79 20.53 22 23.49	1.804 1.918 2.035 2.281 2.541	186.9 194.1 201.3 215.7 230.4	17.69 18.81 19.96 22.37 24.92	0.160.34 0.160.34 0.160.34 0.160.34 0.160.34	1.4 1.5 1.6 1.7 1.8	SS2.5-34 SS2.5-35 SS2.5-36 SS2.5-38 SS2.5-40
SS2.5-42 [ DXF| DWG| 3D CAD] SS2.5-44 [ DXF| DWG| 3D CAD] SS2.5-45 [ DXF| DWG| 3D CAD] SS2.5-46 [ DXF| DWG| 3D CAD] SS2.5-48 [ DXF| DWG| 3D CAD]	42 44 45 46 48	20 20 20 20 20	70 70 70 70 70	105 110 112.5 115 120	110 115 117.5 120 125	25 25 25 25 25	12 12 12 12 12	37 37 37 37 37	- - - - -	- - - - -	S1 S1 S1 S1 S1	24.97 26.47 27.22 27.97 29.48	2.816 3.105 3.255 3.412 3.739	244.9 259.6 266.9 274.3 289.1	27.62 30.45 31.92 33.46 36.67	0.20.4 0.20.4 0.20.4 0.20.4 0.20.4	2 2.1 2.2 2.3 2.5	SS2.5-42 SS2.5-44 SS2.5-45 SS2.5-46 SS2.5-48
SS2.5-50 [ DXF| DWG| 3D CAD] SS2.5-52 [ DXF| DWG| 3D CAD] SS2.5-54 [ DXF| DWG| 3D CAD] SS2.5-55 [ DXF| DWG| 3D CAD] SS2.5-56 [ DXF| DWG| 3D CAD]	50 52 54 55 56	20 20 20 20 20	70 70 70 70 70	125 130 135 137.5 140	130 135 140 142.5 145	25 25 25 25 25	12 12 12 12 12	37 37 37 37 37	- - - - -	- - - - -	S1 S1 S1 S1 S1	30.99 32.5 34.02 34.78 35.55	4.081 4.439 4.812 5.005 5.201	303.9 318.7 333.6 341.1 348.6	40.02 43.53 47.19 49.08 51	0.20.4 0.20.4 0.20.4 0.20.4 0.20.4	2.7 3 3.1 3.2 3.3	SS2.5-50 SS2.5-52 SS2.5-54 SS2.5-55 SS2.5-56
SS2.5-58 [ DXF| DWG| 3D CAD] SS2.5-60 [ DXF| DWG| 3D CAD] SS2.5-62 [ DXF| DWG| 3D CAD] SS2.5-64 [ DXF| DWG| 3D CAD] SS2.5-65 [ DXF| DWG| 3D CAD]	58 60 62 64 65	20 25 25 25 25	70 70 80 80 80	145 150 155 160 162.5	150 155 160 165 167.5	25 25 25 25 25	12 12 12 12 12	37 37 37 37 37	- 10 15 15 15	- 127 130 131 134	S1 S4 S2 S2 S2	37.07 38.6 40.13 41.67 42.43	5.606 6.027 6.464 6.916 7.148	363.5 378.5 393.5 408.6 416.1	54.98 59.1 63.39 67.82 70.1	0.20.4 0.20.4 0.20.4 0.20.4 0.20.4	3.7 2.7 3.1 3.5 3.7	SS2.5-58 SS2.5-60 SS2.5-62 SS2.5-64 SS2.5-65
SS2.5-66 [ DXF| DWG| 3D CAD] SS2.5-68 [ DXF| DWG| 3D CAD] SS2.5-70 [ DXF| DWG| 3D CAD] SS2.5-72 [ DXF| DWG| 3D CAD] SS2.5-75 [ DXF| DWG| 3D CAD]	66 68 70 72 75	25 25 25 25 25	80 80 80 80 80	165 170 175 180 187.5	170 175 180 185 192.5	25 25 25 25 25	12 12 12 12 12	37 37 37 37 37	15 15 15 15 15	140 140 146 151 159	S2 S2 S2 S2 S2	43.2 44.74 46.28 47.82 50.14	7.385 7.869 8.369 8.886 9.69	423.6 438.7 453.8 468.9 491.7	72.42 77.17 82.07 87.14 95.03	0.20.4 0.20.4 0.20.4 0.20.4 0.20.4	3.9 4.1 4.2 4.4 4.7	SS2.5-66 SS2.5-68 SS2.5-70 SS2.5-72 SS2.5-75
SS2.5-76 [ DXF| DWG| 3D CAD] SS2.5-80 [ DXF| DWG| 3D CAD] SS2.5-90 [ DXF| DWG| 3D CAD] SS2.5-100 [ DXF| DWG| 3D CAD] SS2.5-120 [ DXF| DWG| 3D CAD]	76 80 90 100 120	25 25 30 30 30	80 80 90 90 100	190 200 225 250 300	195 205 230 255 305	25 25 25 25 25	12 12 12 12 12	37 37 37 37 37	15 10 10 10 10	160 177 202 227 277	S2 S4 S4 S4 S4	50.91 45.01 51.48 57.97 71	9.966 9.272 11.95 14.99 22.18	499.3 441.4 504.8 568.5 696.3	97.73 90.93 117.2 147 217.5	0.20.4 0.20.4 0.240.48 0.240.48 0.240.48	5 4.1 7.6 7.8 11	SS2.5-76 SS2.5-80 SS2.5-90 SS2.5-100 SS2.5-120

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.

 

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