Needle bearing: device and application

Needle bearing is used in many mechanisms that are involved in construction, agriculture, automotive industry and other industries. Products can be used in various conditions. Needle bearings consist of an outer ground ring having a recess, a set of rollers guided and held by the separator.

The outer thick ring carries the greatest load capacity and is resistant to impact loads. Needle bearing with high-strength separator, guide and holding rollers, provides the necessary rotation speed and retains lubrication.

Products are used that are manufactured both with a polished outer ring, which is carried out by means of machining, and without it. These mechanisms have found application in pulleys, gear pumps, two-stroke engines and automobile transmissions.

Needle bearing can have guide rollers, which are characterized by the presence of an outer thick-walled ring, which is moved directly along the guide. Such rings withstand large loads with minimal bending and deformation effects. This needle bearing contains a complete set of rollers, it is supplied in two designs: with an integrated trunnion, used for console mounting, and with an inner ring that allows mounting by the type of bracket.

To facilitate installation in the head of the trunnion, a socket is used for a hexagonal key or a hole for a screwdriver. Sealed design, with internal thrust washers, allows to increase the service life of the product. The main applications of these devices are sorting aggregates and lifting mechanisms.

Roller needle bearing, having a stamped outer ring, perfectly perceives radial loads and allows to reduce friction between rotating elements. A small cross-section of these products makes it possible to withstand significant loads with minimal dimensions. The mechanism is simply mounted by pressing into the housing. Needle bearings with a closed end are also produced.

The scope of use of the described devices is very wide. They are used in transmissions, engines, transfer boxes, valve mechanisms, steering systems and brakes. With their help, bridge supports, boat outboards, copiers, power tools, fax machines, various household appliances.

Sealed bearings and variants with a closed end are also produced. These devices are used in mechanisms that operate at high speed.

Products with a thick-walled outer ring are used in systems where the shaft is operated at a high inclination angle, for example in hydraulic pumps and axle axles of the leading bridges. Mechanisms with a thin-walled ring create a radial support with a small cross-sectional area.

Such devices have limitations on mass and size. They are used in gearboxes.