Gear accuracy: JIS B 1702-1 Equivalent to N8 grade Tooth profile: Ordinary teeth Pressure angle: 20° Heat treatment: None Tooth surface hardness: (194HB or less) Surface treatment: Black dye (no additional part black dye) Number of teeth: 50 Shape: S5K Standard circle diameter (mm): 200 牙齿宽度(mm):40 孔直径(mm):32 模块:4 牙齿尖端圆直径:208 牙齿凹槽B2 x T2(mm):10×3.3