Post-roller with pin
Post-roller with pin
Technical Characteristics - Back-up rollers with pivot for metal flattening machines
Back-up rllers for metal flattening machines are made in two different executions
- full complement of cylindrical rollers
- with roller cages in mould steel or bronze.
The full complement execution allows the bearing to reach a high load capacity both dynamic and static.
The wide working surface, along with the rolling system, made of two or more cages, allow the plant to reach very high flattening performance and high speed.
The distance rings, which are obtained entirely on the outer ring and on the pivot, and the circle clearance, which is calculated at the minimum, allow a good support of axial loads.
The execution with roller cages represent the most advanced series of back-up rolls.
This series of back-up rollers is usually manufactured with two lateral thrust bearings in the inner body, either with balls or rollers, which guarantee a very strong support of axial loads.
Back-up rollers with pivot for metal flattening machines have the following characteristics:
- The outer ring is supplied in UNI 100Cr6/100CrMo7 core hardened steel 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÷58 on request.
- 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:
1) core hardened steel UNI 100 Cr6/100 CrMo7;
2) case hardened steel UNI 18 NiCrMo5.
In both cases the degree of hardness is 60-HRC.
- The bearings have a grease lubrication system and are supplied already pre-lubricated. The lubrication 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 P0; on request the rollers can be manufactured with precision class P5 (DIN 620) and selected in groups.
- On request, they can be manufactured in stainless steel.
