IS 7906 : Part 5 : 2004 Helical Compression Springs - Part 5 : Hot Coiled Springs made from Circular Section Bars - Specification

1 Scope

1.1 This standard (Part 5) covers hot coiled cylindricalcompression springs made from round bar steel which are hardenedand tempered after coiling.

1.2 This standard is applicable to springs having the followingparameters:

a) Bar diameter, d from 8 to 60 mm,

b) Outside diameter, D_e < 460 mm,

c) Unloaded length, L_o < 800 mm,

d) Number of active coils, n < 3, and

e) Coil ratio, w from 3 to 12.

1.3 In case the lot size exceeds 5 000, then the dimensionaltolerances as given in IS 7906 (Part 7) shall be applicable.

2 References

IS 1500 : 1983 Method for Brinell hardness test for metallic materials

IS 2500 Sampling inspection procedures

    Part 1 : 2000 Attribute sampling plans indexed by acceptable quality level (AQL) for
    lot-by-lot inspection

    Part 2 : 1965 Inspection by variables for percent defective

IS 3195 : 1992 Steel for 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 3703 : 1980 Code of practice for magnetic particle flaw detection

IS 7001 : 1989 Shot peening of steel parts - Specification

IS 7906 Helical compression springs:

    Part 1 : 1997 Design and calculations for springs made from circular section wire and bar

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

    Part 7 : 1989 Quality requirements for cylindrical coil compression springs used mainly  as
    vehicle suspension springs

IS 13190 : 1991 Recommended practice for eddy current examination by rotating probe method of round steel bars