Gear accuracy: JIS B 1702-1 (ISO) Grade 7 Number of teeth: 90 Shape: B1 Standard circle diameter (mm): φ135 Tooth width (mm): 15 Hole diameter (mm): 12 Module: 1.5 Tip circle diameter: φ138 Tooth tip circle直径:30 集线器外径(mm):φ95 尖端圆直径(mm):φ138 集线器长度(mm):15