TECHNICAL SPECIFICATIONS FOR BACK-UP
ROLLERS WITH PIVOT
Back-up rollers with pivot for metal flattening machines and straightening plates have the following characteristics:
The outer ring is supplied in 100Cr6/100CrMo7 core hardened steel (UNI 3097) that can reach hardness 60+2 hrc. Once seen the condition of coupling with working cylinders, the degree of hardness can be reduced to 53 HRc for those bearings for the flattening of very thin sheets.
The profile of the outer ring is usually cambered in order to optimize the distribution of the applied load. The pivot is made in two different steel types, according to dimension and shape:
Core hardened steel UNI 100Cr6 / 100CrMo7, case hardened steel UNI 18NiCrMo5. In both cases the degree of hardness is 60-HRC.
The bearings have a grease lubrification system and are supplied already pre-lubrificated. The lubrification system foresees both the entrance and the exit of grease. They can be supplied also in Long-life execution.
The sealing system is very efficient, it does not allow outer agents (such as, dust, mill scale, humidity) to enter the back-up roll; at the same time, it prevents the leakage of grease.
Precision class is P0; on request the rollers can be manufactured with precision class P5 or P6. On request, they can be manufactured in stainless steel.