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: 56 形状:S5M 标准圆直径(mm):168 牙齿宽度(mm):30 孔直径(mm):35 模块:3 尖端圆形直径:174 牙齿表面效果:切皮 切皮 螺栓 61