| 规格和标准 |
Gear accuracy: JIS B 1704 Grade 0 Tooth profile: Gleason Pressure angle: 20° Heat treatment: Carburized hardening (hole/boss part charcoal prevention) Gear hardness: 60-63HRC (module 1.5, 2 is 80-83HRA) Tooth number ratio: 2 Module: m4 Number of teeth: 18 Standard diameter (mm): 72 Tooth width (mm): 27 Hole diameter (mm): 20 Total length (mm): 33 Shape: A Twist direction: L Boss diameter (mm): 54 Boss length (mm): 3.5 Assembly distance: 80 Tooth tip circle diameter: 78 Tooth surface finish: Grinding Additional work possible: Some not possible Twist angle: 35° Hole diameter公差:H7
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