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Double Row Cylindrical Roller Bearings

Double Row Cylindrical Roller Bearings

Double row cylindrical roller bearing can withstand large radial loads compared to single row cylindrical roller bearings of the same radial dimension. In addition to radial loads, it can withstand a small amount of bidirectional axial load.

Features

Introduction:

The double row cylindrical roller bearings have two inner diameters: a cylindrical hole and a tapered hole: it has a small cross section, high load capacity and high rigidity. Double row cylindrical roller bearings can be mounted separately from their inner rings, or all components can be mounted separately, facilitating the installation, inspection and maintenance of the bearings.

Double row cylindrical roller bearings can withstand large radial loads compared to single row cylindrical roller bearings of the same radial dimension. The outer ring of the bearing has double ribs, the inner ring has a rib and a flat retaining ring. The inner ring and the outer ring can be respectively installed, and the axial displacement of the shaft or the outer shaft direction of the shaft is limited to the axial travel of the bearing. In addition to radial loads, it can withstand a small amount of bidirectional axial load.

The inner and outer rings of double row cylindrical roller bearings are made of high-purity bearing steel or double-vacuum high-temperature heat-resistant bearing steel, combined with special heat treatment process, cold treatment process and material modification technology, which greatly improves the fatigue life of the series.

Main Product:
NN Series, NNU Series, NNF Series.

Features:

* High load capacity: Due to its second row of rollers, double row cylindrical roller bearings are suitable for large radial loads.

* Low coefficient of friction: The roller end design and surface finish promote the lubricant film, which reduces friction and results in a higher basic load rating.

* Long service life: The logarithmic curve profile reduces the edge stress at the roller/race contact and reduces the sensitivity to misalignment and shaft deflection.

* Increased operational reliability: Surface treatment of the roller and raceway contact surfaces facilitates the formation of a hydrodynamic lubricating oil film.

* Separable and interchangeable: easy to install, disassemble and maintain inspection.

* High speed capability: The cage design is suitable for high speed, fast acceleration and shock loads.

Application:

Mainly used in machine tools, rolling stands, plastic drums, grinding machines and large gear boxes. 

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