Ring gear large in size / number of tooth. It can be cut to make segment gears and corner racks.
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Unit of Measure
Items
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KHK SIR2.5-120, Module 2.5, 120 Tooth, Internal Ring Gears
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KHK SIR2.5-200, Module 2.5, 200 Tooth, Internal Ring Gears
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KHK SIR2-120, Module 2, 120 Tooth, Internal Ring Gears
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KHK SIR2-200, Module 2, 200 Tooth, Internal Ring Gears
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KHK SIR3-120, Module 3, 120 Tooth, Internal Ring Gears
Gear Type N/A Internal Gears
Construction N/A Internal Ring Gears
Module N/A 2.5 N/A 2.5 N/A 2 N/A 2 N/A 3
No. of teeth N/A 120 N/A 200 N/A 120 N/A 200 N/A 120
Shape N/A T1
Bending Strength N/A 807 N·m82.3 kgf·m N/A 1320 N·m135 kgf·m N/A 413 N·m42.1 kgf·m N/A 677 N·m69 kgf·m N/A 1390 N·m142 kgf·m
Surface Durability N/A 138 N·m14 kgf·m N/A 220 N·m22.5 kgf·m N/A 68.8 N·m7.02 kgf·m N/A 110 N·m11.2 kgf·m N/A 244 N·m24.9 kgf·m
Backlash N/A 0.0075-0.0161 in0.19-0.41 mm N/A 0.0087-0.0181 in0.22-0.46 mm N/A 0.0067-0.0146 in0.17-0.37 mm N/A 0.0079-0.0161 in0.20-0.41 mm N/A 0.0087-0.0177 in0.22-0.45 mm
Precision Grade N/A JIS grade N9 (JIS B1702-1:1998)
Gear Teeth Type N/A Standard Full Depth
Pressure Angle N/A 20 º
Material N/A S45C (AISI 1045) Carbon Steel
Tooth Hardness N/A (less than 194HB)
Surface Treatment N/A Black oxide coating
Weight N/A 5.55 kg12.236 lb N/A 8.94 kg19.709 lb N/A 2.98 kg6.570 lb N/A 4.8 kg10.582 lb N/A 9.28 kg20.459 lb
Internal Diameter (A) N/A 11.614 in295 mm N/A 19.488 in495 mm N/A 9.291 in236 mm N/A 15.591 in396 mm N/A 13.937 in354 mm
Pitch Diameter (C) N/A 11.811 in300 mm N/A 19.685 in500 mm N/A 9.449 in240 mm N/A 15.748 in400 mm N/A 14.173 in360 mm
Outer Diameter (D) N/A 13.976 in355 mm N/A 21.850 in555 mm N/A 11.260 in286 mm N/A 17.559 in446 mm N/A 16.693 in424 mm
Face Width (E) N/A 0.984 in25 mm N/A 0.984 in25 mm N/A 0.787 in20 mm N/A 0.787 in20 mm N/A 1.181 in30 mm