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Homepage>BS Standards>21 MECHANICAL SYSTEMS AND COMPONENTS FOR GENERAL USE>21.060 Fasteners>21.060.99 Other fasteners>BS 4185-14:1987 Machine tool components Method for determination of the pilot diameter of 60° centre holes
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immediate downloadReleased: 1987-12-31
BS 4185-14:1987 Machine tool components Method for determination of the pilot diameter of 60° centre holes

BS 4185-14:1987

Machine tool components Method for determination of the pilot diameter of 60° centre holes

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Standard number:BS 4185-14:1987
Pages:18
Released:1987-12-31
ISBN:0 580 16281 8
Status:Standard
DESCRIPTION

BS 4185-14:1987


This standard BS 4185-14:1987 Machine tool components is classified in these ICS categories:
  • 21.060.99 Other fasteners
  • 25.060.99 Other machine tool systems

This Part of BS 4185 describes a method for the determination of the pilot diameter, d, of a 60° centre hole, type A, B or R as illustrated in Appendices A to C of BS 328-2:1972, covering the range 0.5 mm ⩽ d ⩽ 50 mm.

This method applies only to workpieces satisfying the following conditions:

  1. force acting at the centre hole, FG, ⩽ 180 000 N;
  2. cutting force, Fs, ⩽ 110 000 N;
  3. where 00176014_img1 ⩾ 3 or 00176014_img16.3 (see BS 328-1 for D in relation to d) (see also clause 2).

NOTE 1 The theoretical concept is explained in Appendix A and additional considerations are given in Appendix B.

NOTE 2 A typical centre hole is illustrated in Figure 1.

NOTE 3 The titles of the publications referred to in this standard are listed on the inside back cover.


Applies to certain types of centre hole described in BS 328-2. Calculations apply to work pieces which are to be machined on centres providing they satisfy specified conditions.