IS 1105 : 1957 Method for precise conversion of inch and metric dimensions to ensure interchangeability

1 Scope

1.1 This standard gives a simplified set of rules for theprecise conversion of dimensions from inches to millimetres andvice versa to ensure interchangeability . The rules are meant foruse particularly in the work of engineers, designers, draughtsmenand shop-workers.

1.1.1 The following categories of dimensions are covered:

a) Simple Feature Dimensions

b) Positional Dimensions

c) Datum Dimensions

d) Untoleranced Dimensions

e) Standard Feature Dimensions

2 References

IS 2 :1949 Rules for rounding offnumerical values

IS 3 : 1949Inch-millimeter conversion for industrial use

IS 696 : 1955Code of practice for general engineering drawings

IS 786 : 1956Conversion factors and conversion tables

IS 787 : 1956Guide for inter-conversion of values from one system ofunits to another

IS 1020 : 1957Conversion tables for ordinary use