Specifications Precision grade JIS B 1704 grade 4 Core hardness HB300320 Gear teeth Gleason Surface hardness HRC5560 Pressure angle 20 Surface treatment - Helix angle 35 Surface finish Cut Material SCM415 (Alloy steel) Datum reference surface for gear grinding Bore Heat treatment Overall carburizing

B3 B4 B7

20 Miter Module 110

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Catalog No. Hand of thread Module No. of teeth Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore Face width Holding surface dia. Face angle Keyway Threaded hole Shape Allowable torque (kgfm) Allowable torque (Nm) Backlash (mm) Weight (kgf) Catalog No. m z AH7 B C D E F G H I J K L WidthDepth M Thread Size Bending strength Surface durability Bending strength Surface durability MMSA1-20R [DXF | DWG | 3D CAD] MMSB1-20R [DXF | DWG | 3D CAD] MMSA1-20L [DXF | DWG | 3D CAD] MMSB1-20L [DXF | DWG | 3D CAD] R 1 20 8 10 17 20 21.29 20 13.53 10.64 8.5 12.2 4.5 11.67 5021' - 4.5 M4 B3 0.2287 0.213 2.243 2.089 0.030.13 0.02 0.02 MMSA1-20R MMSB1-20R MMSA1-20L MMSB1-20L L 1 20 8 10 17 20 21.29 20 13.53 10.64 8.5 12.2 4.5 11.67 5021' - 4.5 M4 B3 0.2287 0.213 2.243 2.089 0.030.13 0.02 0.02 MMSA1.5-20R [DXF | DWG | 3D CAD] MMSB1.5-20R [DXF | DWG | 3D CAD] MMSA1.5-20L [DXF | DWG | 3D CAD] MMSB1.5-20L [DXF | DWG | 3D CAD] R 1.5 20 10 12 25 30 31.9 28 18.48 13.95 10.5 16.5 7 17.2 4952' - 41.8 6 M4 M5 B3 0.7894 0.7487 7.741 7.342 0.050.15 0.06 0.05 MMSA1.5-20R MMSB1.5-20R MMSA1.5-20L MMSB1.5-20L L 1.5 20 10 12 25 30 31.9 28 18.48 13.95 10.5 16.5 7 17.2 4952' - 41.8 6 M4 M5 B3 0.7894 0.7487 7.741 7.342 0.050.15 0.06 0.05 MMSA2-20R [DXF | DWG | 3D CAD] MMSB2-20R [DXF | DWG | 3D CAD] MMSA2-20L [DXF | DWG | 3D CAD] MMSB2-20L [DXF | DWG | 3D CAD] R 2 20 14 16 35 40 42.52 35 22.09 16.26 12.5 20 9 24.54 4949' 52.3 52.3 7 M5 B3 1.83 1.76 17.95 17.26 0.060.16 0.14 0.13 MMSA2-20R MMSB2-20R MMSA2-20L MMSB2-20L L 2 20 14 16 35 40 42.52 35 22.09 16.26 12.5 20 9 24.54 4949' 52.3 52.3 7 M5 B3 1.83 1.76 17.95 17.26 0.060.16 0.14 0.13 MMSA2.5-20R [DXF | DWG | 3D CAD] MMSB2.5-20R [DXF | DWG | 3D CAD] MMSA2.5-20L [DXF | DWG | 3D CAD] MMSB2.5-20L [DXF | DWG | 3D CAD] R 2.5 20 18 20 42 50 53.2 45 28.63 21.6 16 26 11 30.89 5028' 62.8 62.8 8 M6 B3 3.524 3.441 34.56 33.74 0.070.17 0.26 0.24 MMSA2.5-20R MMSB2.5-20R MMSA2.5-20L MMSB2.5-20L L 2.5 20 18 20 42 50 53.2 45 28.63 21.6 16 26 11 30.89 5028' 62.8 62.8 8 M6 B3 3.524 3.441 34.56 33.74 0.070.17 0.26 0.24 MMSA3-20R [DXF | DWG | 3D CAD] MMSB3-20R [DXF | DWG | 3D CAD] MMSA3-20L [DXF | DWG | 3D CAD] MMSB3-20L [DXF | DWG | 3D CAD] R 3 20 20 22 52 60 63.99 50 30.78 21.99 16 27 14 34.4 5124' 62.8 62.8 8 M6 B3 6.315 6.23 61.93 61.09 0.080.18 0.44 0.42 MMSA3-20R MMSB3-20R MMSA3-20L MMSB3-20L L 3 20 20 22 52 60 63.99 50 30.78 21.99 16 27 14 34.4 5124' 62.8 62.8 8 M6 B3 6.315 6.23 61.93 61.09 0.080.18 0.44 0.42 MMSA3.5-20R [DXF | DWG | 3D CAD] MMSB3.5-20R [DXF | DWG | 3D CAD] MMSA3.5-20L [DXF | DWG | 3D CAD] MMSB3.5-20L [DXF | DWG | 3D CAD] R 3.5 20 25 28 50 70 74.53 55 32.45 22.26 14 29 16 42.7 5040' 83.3 83.3 8 M8 B4 9.903 9.859 97.11 96.68 0.10.25 0.5 0.47 MMSA3.5-20R MMSB3.5-20R MMSA3.5-20L MMSB3.5-20L L 3.5 20 25 28 50 70 74.53 55 32.45 22.26 14 29 16 42.75 5040' 83.3 83.3 8 M8 B4 9.903 9.859 97.11 96.68 0.10.25 0.5 0.47 MMSA4-20R [DXF | DWG | 3D CAD] MMSB4-20R [DXF | DWG | 3D CAD] MMSA4-20L [DXF | DWG | 3D CAD] MMSB4-20L [DXF | DWG | 3D CAD] R 4 20 28 30 55 80 84.99 65 39.13 27.5 17 35 18 49.08 4954' 83.3 83.3 9 M8 B4 14.64 14.68 143.6 144 0.120.27 0.72 0.7 MMSA4-20R MMSB4-20R MMSA4-20L MMSB4-20L L 4 20 28 30 55 80 84.99 65 39.13 27.5 17 35 18 49.08 4954' 83.3 83.3 9 M8 B4 14.64 14.68 143.6 144 0.120.27 0.72 0.7 MMSA5-20R [DXF | DWG | 3D CAD] MMSB5-20R [DXF | DWG | 3D CAD] MMSA5-20L [DXF | DWG | 3D CAD] MMSB5-20L [DXF | DWG | 3D CAD] R 5 20 30 35 70 100 106.25 75 42.99 28.13 17 38 23 60.95 4956' 83.3 103.3 9 M8 B4 28.98 29.39 284.2 288.2 0.140.34 1.4 1.3 MMSA5-20R MMSB5-20R MMSA5-20L MMSB5-20L L 5 20 30 35 70 100 106.25 75 42.99 28.13 17 38 23 60.95 4956' 83.3 103.3 9 M8 B4 28.98 29.39 284.2 288.2 0.140.34 1.4 1.3 MMSA6-20R [DXF | DWG | 3D CAD] MMSB6-20R [DXF | DWG | 3D CAD] MMSA6-20L [DXF | DWG | 3D CAD] MMSB6-20L [DXF | DWG | 3D CAD] R 6 20 40 45 80 120 127.59 90 51.13 33.8 20 45 27 73.63 5016' 123.3 143.8 10 M8 B4 48.42 50.55 474.8 495.7 0.160.36 2.3 2.2 MMSA6-20R MMSB6-20R MMSA6-20L MMSB6-20L L 6 20 40 45 80 120 127.59 90 51.13 33.8 20 45 27 73.63 5016' 123.3 143.8 10 M8 B4 48.42 50.55 474.8 495.7 0.160.36 2.3 2.2 MMSA8-20R [DXF | DWG | 3D CAD] MMSA8-20L [DXF | DWG | 3D CAD] R L 8 20 80 - 160 - 100 45 29.16 - 40 35 101 4953' - 110 6-M10 B7 110.5 119.2 1084 1169 0.20.45 4 4 MMSA8-20R MMSA8-20L MMSA10-20R [DXF | DWG | 3D CAD] MMSA10-20L [DXF | DWG | 3D CAD] R L 10 20 100 - 200 - 125 58 36.48 - 50 45 122.72 4957' - 130 6-M10 B7 168.9 188 1656 1844 0.250.5 8.1 8.1 MMSA10-20R MMSA10-20L

Pitch Angle 45

CAUTION:	The products which are hardened by carburizing allow no secondary machining. However, the back surface of B7 type gears are masked during the process so that it is possible to drill and pin on this surface.
CAUTION:	Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips.
NOTE:	Although the dimensions of the keyway are made to the Js9 tolerance, there may be some deviations due to the effects of the heat treatment.
NOTE:	A set screw comes with these products.
NOTE:	The allowable torques shown in the table are calculated according to JGMA Standards 403-01 and 404-01. All dimensions shown in the above table(s) are listed in millimeters unless otherwise specified.

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