Back-up roller bearings NNTR5012548-2Z for steel

Back-up roller bearings NNTR5012548-2Z for steel plant

Apr 14, 2022


BEARING MODELMassBasic sizeLubricating hole



Back-up roller bearings without pivot have the following technical characteristics:

The inner rings and the outer rings are manufactured in GCr15 (100Cr6) core hardened steel, with hardness 60±2 HRG. The outer ring has a cambered radius on the outer diameter; this allows to improve the distribution of the loads during functioning.

Back-up rollers with surface hardness of the outer ring reduced to 53~58 HRC can be supplied on request.

Inner ring with holes and grooves for the inflow of the lubricant.

Full-complement of cylindrical rollers to ensure the highest possible load capacity.

Double system of protection and tightness, through shields and sealing spring rings made of steel. The sealing system can be also with lip shearing rubber seals.

The tolerances during execution are according normal class PO; special execution according class P5 (DIN 620) can be manufactured on request.

On request, they can be manufactured in stainless steel.




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