Gear accuracy: JIS B 1702-1 (ISO) Grade 7 Number of teeth: 64 Shape: B1 Standard circle diameter (mm): φ192 Tooth width (mm): 30 Hole diameter (mm): 20 Module: 3 Tip circle diameter: φ198 Total length (mm): 50 集线器外径(mm):φ130 总长度L:50 牙齿尖端圆直径(mm):φ198 集线器长度(mm):20