Torsion spring: simple or complex springs, in round wire , square or rectangular section; diameter from 0,07 mm to 20,00 mm.
Torsion spring – reference standard
UNI 9061 ALL.1:1987
UNI 9061 ALL.2:1987
UNI 9062:1987
UNI EN 13906-3:2003
Torsion spring – raw material used
Carbon steel wire norm EN 10270-1 with in addition for SM, SH, DH
Carbon steel wire norm EN 10270-1 type SM, SH, DH in pre-galvanized, Alumar® e Bezinal®
Steel wire pre-temperate norm EN 10270-2FD, TD, VD Cr-Si
Inox steel wire norm EN 10270-3 with in addition for 1.4301, 1.4539 according to EN 10088-3 with in addition for 1.4310, 1.4310 HS, 1.4568, 1.4404.
Copper alloy: norm EN 12166 brass and bronze phosphor.
Production line batch
Small amount: ten of pieces
Large amount: millions of pieces
Treatments
Epoxide coating
Cataphorised coating
Zintek® coat
Geomet 320®
White and yellow trivalent galvanization (free from Cr VI)
Phosphated, Passivation, Nickel, Chrome platings, Thick chrome, Hard chrome, Chemical nickel, gold, silver, brass, copper and Shot peeninig.
