Gear accuracy: JIS B 1702-1 (ISO) Grade 7 Number of teeth: 28 Shape: B1 Standard circle diameter (mm): φ84 Tooth width (mm): 30 Hole diameter (mm): 12 Module: 3 Tip circle diameter: φ90 Total length (mm): 50 集线器外径(mm):φ70 总长度L:50 牙齿尖端圆直径(mm):φ90 集线器长度(mm):20