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數控車床圖紙尺寸标記個m20是什麼意思?
數控車床圖紙尺寸标記個m20是什麼意思?
更新时间:2024-10-01 08:10:40

  1、數控車床圖紙尺寸标記個m20是20毫米的标準公制螺紋。

  2、公制螺紋,螺紋标準的一種,又稱米制螺紋,與英制螺紋最大的區别是螺距用毫米計量。

  3、公制螺紋有普通螺紋(牙型角60°);梯形螺紋(牙型角30°);鋸齒形螺紋(牙型角33°);方牙螺紋等幾種。

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