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:27 形状:S1MB 标准圆直径(mm):54 牙齿宽度(mm):20孔直径(mm):16模块:2 牙齿尖端圆形直径:58 牙齿表面饰面:磨牙 螺栓尺寸:M4 x 15 螺栓数:6 灌木直径:33