Gear accuracy: JIS B 1702-1 Equivalent to N7 grade Tooth profile: Ordinate teeth Pressure angle: 20° Material: S45C Heat treatment: Induction hardening on the tooth surface Tooth surface hardness: 50-60HRC Surface treatment: Black dye (The fastening parts, teeth and additional working parts are not blackened. ) Number牙齿:38 形状:S1MB 标准圆直径(mm):76 牙齿宽度(mm):20孔直径(MM):18模块:2齿尖圆直径:80总长度:80总长度(mm)螺栓:8灌木直径:34.5