Gear accuracy: JIS B 1702-1 (ISO) Grade 7 Number of teeth: 40 Shape: B1 Standard circle diameter (mm): φ32 Tooth width (mm): 8 Hole diameter (mm): 6 Module: 0.8 Tip circle diameter: φ33.6 Total length (mm): 18 集线器外径(mm):φ25 尖端圆直径(mm):φ33.6 集线器长度(mm):10