Gear accuracy: JIS B 1704:1978 Equivalent to grade 0 Heat treatment: Carburize and harden only the teeth Tooth surface hardness: 55-60HRC Module: 2.5 Number of teeth: 30 Standard circle diameter (mm): 75 Hole diameter (mm): 19 Assembly distance (mm): 60 总长度(mm):33 牙齿宽度(mm):15 形状:b4k 扭曲角:35° 牙齿尖端圆形直径(mm):76 boss Diameter(mm):55 boss长度(mm):16 点击:M5 钥匙凹槽:6 x 2.8 牙齿轮廓:Gleason 压力角(°):20