Gear accuracy: JIS B 1702-1 (ISO) Grade 7 Number of teeth: 120 Shape: B1 Standard circle diameter (mm): φ120 Tooth width (mm): 10 Hole diameter (mm): 10 Module: 1 Tip circle diameter: φ122 Total length (mm): 20 集线器外径(mm):φ90 尖端圆直径(mm):φ122 集线器长度(mm):10