Gear accuracy: JIS B 1702-1 (ISO) Grade 7 Number of teeth: 15 Shape: B1 Standard circle diameter (mm): φ37.5 Tooth width (mm): 25 Hole diameter (mm): 10 Module: 2.5 Tooth tip circle diameter: φ42.5 Total length (mm):45 集线器外径(mm):φ30 牙齿尖端圆直径(mm):φ42.5 集线器长度(mm):20