IS 7907 : Part 1 : 2004 Helical Extension Springs - Part 1 : Design and Calculation for Springs Made from Circular Section Wire and Bar

1 Scope

This standard (Part 1) lays down calculations for design ofhelical extension springs made from circular section wire and bar.

It applies to cold and hot coiled springs loaded in thedirection of the spring axis and operated at normal roomtemperature. For operations at considerably higher or lowertemperatures, spring manufacturer should be consulted.

2 References

IS 3195 : 1992 Steel for the manufacture of volute and helical springs (for railway rolling stock)

IS 3431 : 1982 Steel for the manufacture of volute, helical and laminated springs for automotive suspension

IS 4076 : 1983 Hard brass wires for springs and other special purposes

IS 4454 Specification for steel wires for cold formed springs:

Part 1 : 2001 Patented and cold drawn steel wires - Unalloyed

Part 2 : 2001 Oil hardened and tempered spring steel wire and valve spring wire - Unalloyed

Part 4 : 2001 Stainless spring steel wire for normal corrosion resistance

IS 7608 : 1987 Phosphor bronze wire for general engineering purposes

IS 7811 : 1985 Phosphor bronze rods and bars

IS 7814 : 1985 Phosphor bronze sheet and strip

IS 7907 Helical extension springs:

Part 2 : 1976 Specification for cold coiled springs made from circular section wire and bar

Part 3 : 1975 Data sheet for specification for springs made from circular section wire and bar