Limits and fits. Guidance for system of cone (taper) fits and tolerances for cones from C = 1:3 to 1:500, lengths from 6 mm to 630 mm and diameters up to 500 mm

BS 4500:2009 Limits and fits. Guidance for system of cone (taper) fits and tolerances for cones from C = 1:3 to 1:500, lengths from 6 mm to 630 mm and diameters up to 500 mm

BS 4500 gives guidance on a system of cone fits and tolerances for cones from C = 1:3 to 1:500 and lengths from 6 mm to 630 mm. The appropriate tolerances of BS 4500 can also be used for prismatic workpieces, for example wedges. BS 4500 applies to cones which are dimensioned and toleranced according to BS ISO 3040, Method 1, Basic Taper method. This means that the tolerances limit the variation of penetration of mating surfaces, each surface being within two limiting profiles of the same taper corresponding to the maximum material condition (MMC) and the least material condition (LMC).

BS 4500 is derived from BS EN 20286, and is a complement to BS EN ISO 1119.

Contents of BS 4500:

Foreword

Section 1: General

Scope

Normative references

Terms and definitions

Section 2: System of cone fits

Formation of cone fits

Calculation of axial displacements for the hole basis system of cone fits

Section 3: System of cone tolerances

Basis of the system

Cone diameter tolerance (TD)

Cone angle tolerance (AT )

Cone form tolerances (TF)

Cone section diameter tolerance (TDS)

Table of cone angle tolerances – structure of the table