Uses: Suitable for small diameter steel ball on the manufacture of rolling bearings, roller, needle.

Characteristics GCr9: with GCr6 steel, wear resistance and hardenability high critical oil quenching diameter of 12 ~ 38mm (50% martensite); still good machinability, organization granular pearlite cold plastic deformation is moderate; weldability are also more sensitive to white spot formation, NTN tendency to temper brittleness bearing heat treatment, general use after quenching and tempering.

Purposes: manufacturing the rolling bearing on the small size steel ball and a roller, can also be used to manufacture requiring high wear resistance, high elastic limit, high contact fatigue strength of the other parts.

Characteristics GCr9SiMn: mechanical properties and wear resistance of GCr15 steel are similar, but high hardenability and good technological properties, oil critical quenching diameter of 60 ~ 110mm (50% martensite); poor welding cold plastic deformation is moderate, white spot formation sensitive, have a tendency to temper brittleness, general use after quenching and tempering.

Usage: Suitable for instead of the the GCr15 steel manufacturing large size of the bearing rings.

GCr15 one of the most common bearing steel, INA Bearing high hardenability, in oil critical quenching diameter of about 18 ~ 40mm (50% martensite); after the heat treatment to obtain high and uniform hardness and wear ; fatigue life long, cold plastic deformation moderate machinability indirect poor white spot formation sensitive temper brittleness, general use after quenching and tempering.

Usage: suitable for high speed, high load large mechanical bearing balls, rollers and rings; bear a greater load can also be used in the manufacture of high wear-resistant, bearing high elastic limit and high contact fatigue strength of mechanical parts and a variety of precision measuring tools, Die, general tools, etc.; the carbonitriding treatment can be used in the manufacture of high wear-resistant, heat-resistant and require dimensional stability and high life parts.

Higher wear resistance and hardenability characteristics GCr15SiMn: than GCr15 steel, IKO bearings critical quenching diameter of about 90 ~ 110mm (50% martensite) in oil, and other characteristics similar to, the general back after quenching and low temperature fire after use.
  

Usage: suitable for the manufacture of large or extra large bearing steel ball, roller and rings, high hardness, high wear of mechanical parts and tool can also be used for manufacturing requirements.
Bearing parts, although the structure is simple, but technically demanding, hence several processing characteristics as follows:

1. Precision machining
To the bearing parts most of the surface after grinding, grinding size and geometric accuracy in μm units, especially the more accurate ferrule raceway and rolling element, need super finishing or grinding.

2.Multi-process machining
Bearing parts requirements, production processes is inevitable. The general bearing production takes 20 to 40 steps, and more up to 70 multi-channel.

3. forming
The working surface of the bearing parts are rotary molding surface, the molding method suitable for processing. Ferrule the of forging rolling with car grinding raceway, are forming tool or anti-plate processing.
In addition, the vast majority of bearings are standardized products, the same type of bearing requirements, in order to increase productivity, reduce costs, ensure quality and widespread adoption of new technology to improve the level of mechanization and automation, bearing company generally bearing types and varieties mass production, even the establishment of specialized automatic production line or pipeline