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

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BS 1916-1:2009

Limits and fits for engineering. Guide to limits and tolerances

Status : Confirmed, Current   Published : September 2009

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

BS 1916-1 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 BS 1916-1 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, and further guidance on tolerances for shafts and holes for a wide range of fits  included in BS 1916-1, 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.

Contents of BS 1916-1:

  • ForewordScope
  • Normative references
  • Terms and definitions
  • Basis of conversion
  • Diameter steps
  • Explanation of the system
  • Terminology
  • Selection of limits
  • Initial selection for normal use
  • Gauge limits
  • Equivalent fits
  • Limits for holes and shafts
  • Rules for rounding-off tolerances
  • Derivation of fundamental deviations
  • Special notes on tables of limits
  • Bibliography



Standard NumberBS 1916-1:2009
TitleLimits and fits for engineering. Guide to limits and tolerances
StatusConfirmed, Current
Publication Date30 September 2009
Confirm Date01 July 2014
Cross ReferencesBS 969, BS 8888, BS 1916-2, BS 1916-3, BS 2045, BS EN 20286-1, BS EN 20286-2
ReplacesBS 1916-1:1953
Draft Superseded By09/30192598 DC
DescriptorsFits, Dimensional tolerances, Dimensions, Diameter, Tolerances of position, Holes, Shafts (rotating), Selection, Imperial system, Rounding (numbers), Grades (quality), Designations, Machining tolerances
ICS17.040.10
CommitteeTDW/4/10
ISBN978 0 580 65212 7
PublisherBSI
FormatA4
DeliveryYes
Pages38
File Size2.924 MB
Price£168.00


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