BS 1916-1:1953

Cooperating organizations
Foreword
General notes on the system
Specification
1. Scope
2. Definitions relating to limits and fits
3. Basis of conversion
4. Diameter steps
5. Explanation of the system
6. Terminology
7. Selection of limits
8. Initial selection for normal use
9. Gauge limits
10. Equivalent fits
Tables
1. Fundamental tolerances, grades 1 to 16. Inch units
2. Limits for holes. Inch units
3. Limits for shafts. Inch units
Figures
1. Diagram showing the disposition of limits and
     tolerances
2. Tolerance zones for holes arranged according
     to symbol
3. Tolerance zones for shafts arranged according
     to symbol
4. Recommended selection of fits for general
     engineering requirements, basic hole system
Appendices
A. Rules for rounding-off tolerances
B. Derivation of fundamental deviations
C. Special notes on tables of limits

Tables of fundamental tolerances in sixteen grades and of limits for twenty-one qualities of shafts and holes in inch and metric. Metric tables extracted from ISA system, inch tables are direct conversion with values rounded in accordance with a preferred series of tolerances. Explanation of system, diagrams, disposition of tolerance zones for holes and shafts, selection of fits for general engineering. Formulae from which fits are derived. Imperial units only.