The advantages and disadvantages of INA bearing and common m

2011-10-11 15:57    Author:admin   Click:


At present, INA bearings are widely used in mechanical support. It is to ensure the life of bearing enough under the premise, to support the shaft and shaft parts, and the frame of relative rotation, swinging motion, so that the friction between the rotating pair is reduced as far as possible, in order to obtain a higher transmission efficiency.

The commonly used INA bearings have been developed by national standard, it is the use of rolling friction principle design, by the professional chemical plant mass production of standard parts. In mechanical design only according to the working conditions of selecting the appropriate INA bearing types and models for composite structure design.

INA  bearings are widely used, because it has the following advantages:

Application of simple design, products have been standardized, and the professional manufacturers for mass production, has good interchangeability and versatility;

Starting friction torque is low, small power consumption, INA bearing efficiency (0.98-0.99 ) than in mixed lubrication bearing high;

Load, speed and temperature adaptation range, working conditions of the small change on bearing performance influence;

Most types of bearings can support both radial and axial loads, smaller axial size;

Easy to lubricate, maintenance and maintenance.

INA bearings have the following drawbacks:

Most of the INA bearing radial size large;

In high speed, heavy load conditions, short service life;

Vibration and large noise.

INA bearing inner ring, outer ring, is generally composed of a rolling body and a holding frame. Each part of the commonly used materials for: the rolling body and the inner ring and the outer material is required to have high hardness and contact fatigue strength, good wear resistance and impact toughness. General use chromium alloy steel, commonly used materials are GCr15, GCr15SiMn, GCr6, GCr9, after heat treatment hardness can reach HRC61-65. The retainer with low carbon steel plate stamping, high-speed bearing used in non-ferrous metals ( such as copper ) or plastic holder.