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CUSCINETTI SPECIALI

SPECIAL BEARINGS

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Pressure Rollers

The pressure rollers basically derive from full complement double row cylindrical roller bearings. In some cases, they can be four-row, full complement cylindrical rollers. The outer ring, of great thickness, has three integral edges

It also has a very wear-resistant diametrical outer surface, cylindrical in shape, with bevels or fittings at the ends. The inner ring is in two parts, each equipped with an integral flange, designed to withstand the strong axial loads that accompany radial loads.

Originally, the pressure rollers were designed to be used on the continuous furnaces of sintering and pelletizing plants. These units, ready for assembly, are also suitable for all applications where high loads are present and the direction of rotation often reverses, or in applications where there are low speeds.


PRESSURE ROLLERS TECHNICAL FEATURES

The outer and inner rings are usually made of 100CrMo7 (UNI 3097) hardened steel, steel with the best resistance to wear due to fatigue. Some executions provide for the bainitic hardening heat treatment in cases where the application is particularly subjected to shocks.
The suffixes to be added in this case are:

  • BH1 - Bainitic hardening for both rings;

  • BH2 - Bainitic hardening only for the outer ring.


Some executions require the use of 18NiCrMo5 (UNI 7846) case hardening steel. The surface hardness that can be achieved for these parts is 60 + 2 HRc.

These bearings, normally working in the presence of high temperatures, are always subjected to stabilization treatment for use up to 250 ° C.
The O-rings (FKM), inserted in a special groove of the inner ring edges, make the bearing non-separable and prevent the contamination from the outside and the leakage of the lubricant. The material allows it to be used up to 250 ° C.

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