BS 1726-1:1987

Foreword
Committees responsible
Guide
Section one. General
1. Scope
2. Definitions
3. Symbols
4. General
Section two. Compression springs made from circular
section material
5. Methods of calculation
6. Tolerances
Section three. Compression springs made from rectangular
(including square) section material
7. Limitation on material section dimensions
8. Methods of calculation
9. Tolerances
Appendices
A. Methods of specifying springs for general purposes
B. Methods of testing
C. Modules of rigidity of some materials
D. Typical tolerances on rectangular section material
Tables
1. Calculated tolerances for group A springs made from
     circular section material, with more than 3.5 and
     less than 5 total coils
2. Calculated tolerances for group B springs made
     from circular section material, with more than
     3.5 and less than 5 total coils
3. Calculated tolerances for group A springs made
     from rectangular section material, with more
     than 3.5 and less than 5 total coils
4. Calculated tolerances for group B springs made
     from rectangular section material, with more than
     3.5 and less than 5 total coils
5. Modulus of rigidity values
6. Typical tolerances on rectangular section material
Figures
1. End fixation factor H for various end conditions
2. Critical values H/(Lo/D)
3. Rectangular section: design chart for stress
4. Rectangular section: design chart for rate
5. Critical relative deflection for m = 1.0 to 2.5
6. Critical relative deflection for m = 0.4 to 1
7. Hand of coiling
8. End coil form
9. Coil end formed from tapered bar
10. Data sheet 1
11. Data sheet 2
12. Measurement of free length and parallelism
13. Measurement of squareness
14. Measurement of bow

Definitions, method of calculation and tolerances. Appendices cover methods of specifying and testing.