莫氏锥柄刀具用的外锥度为7/24的缩径套筒

[中文适用范围]： 本文件规定了莫氏锥柄（1 号至 6 号）刀具的 7/24 外锥度变径套筒（30、40、45、50 和 60 号）的尺寸。 所有这些套筒都允许驱动具有莫氏锥度柄的工具，该柄的小端有一个榫头；某些套筒允许驱动带有莫氏锥柄的工具，该柄上有一个轴向螺纹孔： ——使用套筒的内置螺钉 30 × 1 – 40 × 1 – 40 × 2 – 45 × 1 – 45 × 2 – 45×3 – 50×2 – 50×3 – 50×4 – 60×3 – 60×4 – 60×5; ——使用套筒拉杆 30 × 1 – 30 × 2 – 40 × 1 – 40 × 2 – 40 × 3 – 45 × 1 – 45 × 2 – 45 × 3 – 45 × 4 – 50 × 2 – 50 × 3 – 50 × 4 – 50 × 5 – 60 × 3 – 60 × 4 – 60 × 5 – 60 × 6。 莫氏锥度符合 ISO 296，7/24 锥度符合 ISO 297。 [外文原描述]： ISO 4202:2016 specifies the dimensions of reduction sleeves with external 7/24 taper (Nos. 30, 40, 45, 50 and 60) for tools with Morse taper shanks (Nos. 1 to 6). All these sleeves allow driving of tools having Morse taper shanks which have a tenon at the small end of the shank; some sleeves allow driving of tools having Morse taper shanks which have an axially tapped hole in the shank: - with the use of an incorporated screw for sleeves 30 × 1 ? 40 × 1 ? 40 × 2 ? 45 × 1 ? 45 × 2 ? 45 × 3 ? 50 × 2 ? 50 × 3 ? 50 × 4 ? 60 × 3 ? 60 × 4 ? 60 × 5; - with the use of a draw bar for sleeves 30 × 1 ? 30 × 2 ? 40 × 1 ? 40 × 2 ? 40 × 3 ? 45 × 1 ? 45 × 2 ? 45 × 3 ? 45 × 4 ? 50 × 2 ? 50 × 3 ? 50 × 4 ? 50 × 5 ? 60 × 3 ? 60 × 4 ? 60 × 5 ? 60 × 6. Morse tapers conform to ISO 296 while 7/24 tapers are in accordance with ISO 297.