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BSI BS 1916-1:2009

Limits and fits for engineering -- Guide to limits and tolerances
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BSI BS 1916-1:2009

Limits and fits for engineering -- Guide to limits and tolerances

PUBLISH DATE 2009
PAGES 38
BSI BS 1916-1:2009

This part of BS 1916 gives guidance on tolerances, limits and fits for engineering sizes up to 19.69 in. The recommendations apply particularly to fits between cylindrical parts, designated as “holes” and “shafts”, in which case the term “size” refers to the diameter of the mating parts. The data may also be applied in appropriate cases, by suitable selection of the grades of allowance and tolerances, to fits between other than cylindrical mating parts, in which case the “size” refers to a length, width or other dimension instead of to a diameter.

The system described in this British Standard comprises suitable combinations of 16 grades of tolerance and 21 types of fit for both hole and shaft, ranging from fits of extreme interference to those of extreme clearance. All but very exceptional engineering requirements are covered, from very coarse work to fine gauge manufacture.

A selection of fits for general use is given in Figure 4, and further guidance on tolerances for shafts and holes for a wide range of fits is given in Part 2 of this British Standard, but it is intended that a particular industry or organization extracts and uses those limits which suit its own product. A unilateral hole basis system is recommended but a full range of holes suitable for use on a shaft basis system, unilateral or bilateral, is also included in the tables.

SDO BSI: British Standards Institution
Document Number 1916-1
Publication Date Sept. 30, 2009
Language en - English
Page Count
Revision Level
Supercedes
Committee TPR/1/10
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