Gear accuracy: JIS B 1702-1 N8 grade equivalent Tooth profile: Ordinary teeth Pressure angle: 20° Material: S45C Heat treatment: None Tooth surface hardness: (194HB or less) Surface treatment: Black dye (The fastening parts and additional working parts are not blackened. ) Number of teeth: 70 形状:S5M 标准圆直径(mm):175 牙齿宽度(mm):25 孔直径(mm):35 模块:2.5 牙齿尖端圆圈直径:180 直径:61