1.1 This Indian Standard ( Part 5 ) covers hot coiled cylindrical compression springs made from round bar steel which are hardened and tempered after coiling.
1.2 This standard is applicable to springs having the following parameters:
a) Bar diameter 'd' from 8 to 60 mm
b) Outside diameter De ≤ 460 mm
c) Unloaded length L0 ≤ 800 mm
d) Number of active coils n≥ 3
e) Coil ratio ω from 3 up to 12
1.3 In case the lot size exceeds 5 000, then the dimensional tolerances as given in Part 7 of this standard shall be applicable.
IS 7906 Pt.5-1989 history
1989IS 7906 Pt.5-1989 Helical compression springs Part 5 Specification for hot rolled springs made of steel bars of circular cross-section