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 cutting Bore Heat treatment Overall carburizing Back surface of B7 type is machinable due to masking during carburization.

B3 B4 B7

Gear Ratio 2.5

Module 16

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 MBSA1-4518R [ DXF| DWG | 3D CAD] MBSB1-4518R [ DXF| DWG | 3D CAD] MBSA1-1845L [ DXF| DWG | 3D CAD] MBSB1-1845L [ DXF| DWG | 3D CAD] R 1 45 10 12 25 45 45.39 23 16.9 14.48 10 15 7 30.72 6951' - 41.8 5 M4 M5 B4 0.8828 0.9104 8.657 8.928 0.030.13 0.09 0.09 MBSA1-4518R MBSB1-4518R MBSA1-1845L MBSB1-1845L L 1 18 6 8 15 18 20.19 32 16.29 9.94 8.9 15.5 7 10.3 2501' - - 5 M4 M4 B3 0.3468 0.3642 3.401 3.572 0.030.13 0.02 0.02 MBSA1.5-4518R [ DXF| DWG | 3D CAD] MBSB1.5-4518R [ DXF| DWG | 3D CAD] MBSA1.5-1845L [ DXF| DWG | 3D CAD] MBSB1.5-1845L [ DXF| DWG | 3D CAD] R 1.5 45 15 18 35 67.5 68.05 30 21.06 17.18 10 18 11 45 6924' 52.3 62.8 5 M5 M6 B4 3.071 3.238 30.12 31.75 0.050.15 0.27 0.26 MBSA1.5-4518R MBSB1.5-4518R MBSA1.5-1845L MBSB1.5-1845L L 1.5 18 10 12 23 27 30.2 45 21.91 11.89 10.45 21 11 16.51 2434' 41.8 5.5 M4 M5 B3 1.207 1.295 11.84 12.7 0.050.15 0.06 0.05 MBSA2-4518R [ DXF| DWG | 3D CAD] MBSB2-4518R [ DXF| DWG | 3D CAD] MBSA2-1845L [ DXF| DWG | 3D CAD] MBSB2-1845L [ DXF| DWG | 3D CAD] R 2 45 20 25 48 90 90.79 40 27.67 22.98 15 25 14 62.24 7029' 62.8 83.3 8 M6 M8 B4 7.063 7.581 69.26 74.34 0.060.16 0.43 0.59 MBSA2-4518R MBSB2-4518R MBSA2-1845L MBSB2-1845L L 2 18 12 16 32 36 40.42 60 28.54 15.88 14.2 27.5 14 23.11 2538' 41.8 52.3 7 M5 M5 B3 2.774 3.032 27.2 29.73 0.060.16 0.15 0.13 MBSA2.5-4518R [ DXF| DWG | 3D CAD] MBSB2.5-4518R [ DXF| DWG | 3D CAD] MBSA2.5-1845L [ DXF| DWG | 3D CAD] MBSB2.5-1845L [ DXF| DWG | 3D CAD] R 2.5 45 25 30 55 112.5 113.49 50 34.94 28.74 19 31 18 76.53 6950' 83.3 83.3 10 M8 M8 B4 14.05 15.26 137.8 149.6 0.070.17 1.13 1.08 MBSA2.5-4518R MBSB2.5-4518R MBSA2.5-1845L MBSB2.5-1845L L 2.5 18 15 20 40 45 50.35 72 33.19 16.82 14.75 31.5 18 26.82 2443' 52.3 62.8 8 M5 M6 B3 5.52 6.106 54.13 59.88 0.070.17 0.27 0.24 MBSA3-4518R [ DXF| DWG | 3D CAD] MBSB3-4518R [ DXF| DWG | 3D CAD] MBSA3-1845L [ DXF| DWG | 3D CAD] MBSB3-1845L [ DXF| DWG | 3D CAD] R 3 45 30 35 65 135 136.24 60 41.65 34.55 22 37 21 92.96 7015' 83.3 103.3 11 M8 M8 B4 23.84 26.14 233.8 256.3 0.080.18 1.95 1.9 MBSA3-4518R MBSB3-4518R MBSA3-1845L MBSB3-1845L L 3 18 20 25 48 54 60.69 85 37.82 18.84 16.3 36 21 33.41 2533' 62.8 83.3 9 M6 M8 B3 9.364 10.46 91.83 102.6 0.080.18 0.42 0.37 MBSA4-4518R [ DXF| DWG | 3D CAD] MBSA4-1845L [ DXF| DWG | 3D CAD] MBSB4-1845L [ DXF| DWG | 3D CAD] R 4 45 80 - 180 - 55 29.77 21.25 - 25 29 122.33 6947' - 110 6-M10 B7 57.82 64.26 567 630.2 0.120.27 4 MBSA4-4518R MBSA4-1845L MBSB4-1845L L 4 18 28 32 63 72 80.86 110 48.03 21.77 18.2 46 29 45.83 2522' 83.3 103.3 10 M8 M8 B3 22.71 25.7 222.7 252 0.120.27 0.92 0.85 MBSA5-4518R [ DXF| DWG | 3D CAD] MBSA5-1845L [ DXF| DWG | 3D CAD] MBSB5-1845L [ DXF| DWG | 3D CAD] R 5 45 100 - 225 - 65 33.37 22.82 - 28 36 153.85 6948' - 130 6-M10 B7 112.4 126.2 1102 1238 0.140.34 6.9 MBSA5-4518R MBSA5-1845L MBSB5-1845L L 5 18 35 42 80 90 101.07 135 57.3 24.71 20.5 54.5 36 56.13 2522' 103.3 123.3 11 M8 M8 B3 44.16 50.46 433.1 494.8 0.140.34 1.7 1.6 MBSA6-4518R [ DXF| DWG | 3D CAD] MBSA6-1845L [ DXF| DWG | 3D CAD] MBSB6-1845L [ DXF| DWG | 3D CAD] R 6 45 110 - 270 - 75 36.97 24.19 - 30 43 184.57 6919' - 140 6-M10 B7 189.8 218.9 1861 2147 0.160.36 11 MBSA6-4518R MBSA6-1845L MBSB6-1845L L 6 18 45 50 95 108 120.55 160 66.73 27.51 22.4 63 43 66.44 2420' 143.8 143.8 12 M8 M8 B3 74.56 87.58 731.2 858.9 0.160.36 2.7 2.5

Pitch Angle Gear 6812' Pinion 2148'

CAUTION:	With the exception of B7 type gears, 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.
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.
NOTE:	The allowable forces shown in the table are for racks mating with 30 teeth pinions calculated according to JGMA Standards 401-01 and 402-01.
NOTE:	The items listed above as are available from stock until current inventory is exhausted. At that time the product will only be available on a made to order custom basis.
USEFUL HINT:	These gears are designed such that, when assembled according to the specified mounting distance with a tolerance of H7H8, the backlashes shown in the table are obtained. Mounting distance error, offset error and shaft angle error must be minimized to avoid excessive noise and wear.

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