ROLLS FOR STRAIGHTENING
AND LEVELLING MACHINES

B.S.A. is specialized in building and supplying of rolls for straightening and levelling machines both for hot and cold rolled coils in steels, stainless steels and in non ferrous metals. The work-shop is equipped with tool-machines and equipments needed for supply rolls from ø10 to ø400 mm.

Most used material grades are noted in the next table, further grades are availables for the satisfaction of particular customer requests:


STEEL GRADE Wr. n° INDUCTION SURFACE
HARDENING
 END USES
42CrMo4
45CrMo5
1.7225 Intermediate roll: HRC 58÷60
Work rolls: HRC 60÷62
Black sheets with tensile
strenght up to 500 N/mm 2
100Cr6
100CrMo7
1.3505
1.3537
Intermediate roll: HRC 59÷61
Work rolls: HRC 62÷64
Cold and hot rolled coil; stainless steel sheets;
non ferrous metal sheets
88MnV8
90MnVCr8
1.2842 Intermediate roll: HRC 56÷68
Work rolls: HRC 60÷62
Hot rolled coil with medium or
high tickness
50CrV4
51CrMoV4
1.8159
1.7701
Back-up rolls: HRC 58÷60
Work rolls: HRC 60÷63
High tickness sheets (> 8mm)
and heavy duty levelling


For increasing the work-time of the rolls sets is suggested differenziate the hardness between the work-rolls and the intermediate rolls; this objective may be reached using steel with different hardenability characteristics so that it is possible to optimize the performances of the rolls in function of the different steel grades.

B.S.A. is involved not only in supplying of new sets of rolls, but also in regeneration by grinding of damaged rolls for being re-used; moreover it is possible to execute a complete rewamping of levelling benches with enclosured replacement of bearings, brass and lubrication.

An important key of competitivity of the company is the great steels grades raw material availability from store and the vertical integration between machinings (B.S.A.) and heat treatments (TERMOSTAHL), so that production is very flexible and it is possible to intervene very speedly in case of urgency.



       

Rolls from ø10 to ø400 x 7000 mm



Other examples:

Spiralized back-up rolls
Spiralized back-up rolls
Steel: 42CrMo4 hot rolled and Q.+T. (Wr. N. 1.7225)
Induction hardening: HRC 58÷60 deep: 4 mm
Back-up rolls
Back-up rolls
Steel: 90MnVCr8 forged and Q.+T. (Wr. N. 1.2842)
Induction hardening: HRC 58÷60 deep 5 mm
Intermediate and work rolls
Intermediate and work rolls
Steel: 100Cr6 hot rolled and annealed (Wr. N. 1.3505)
Induction hardening: HRC 60÷63 deep: 4÷6 mm
Intermediate and work rolls
Intermediate and work rolls
Steel: 100Cr6 hot rolled and annealed (Wr. N. 1.3505)
Induction hardening: HRC 62÷64 deep 4 mm
Work rolls
Work rolls
Steel: 100CrMo7 forged and Q.+T. (Wr. N. 1.3537)
Induction hardening: HRC 62÷64 deep: 6÷8 mm
Work rolls
Work rolls
Steel: 50CrV4 forged and Q.+T. (Wr. N. 1.8159)
Induction hardening: HRC 60÷63 deep: 8÷10 mm