Gear accuracy: JIS B 1702-1 (ISO) Grade 7 Number of teeth: 50 Shape: B1 Standard circle diameter (mm): φ75 Tooth width (mm): 15 Hole diameter (mm): 10 Module: 1.5 Tip circle diameter: φ78 Tooth tip circle diameter: 30 集线器外径(mm):φ60 牙齿尖端圆直径(mm):φ78 集线器长度(mm):15