Bearing Steel Wire

Bearing steel wire refers to a type of steel wire that is specifically designed and manufactured for use in bearings. Bearings are mechanical components that reduce friction between moving parts and support the load they carry. Bearing steel wire is used to create the inner and outer rings of bearings, which need to be durable, wear-resistant, and capable of withstanding high loads and repetitive motion.

Bearing steel wire is typically made from high-carbon or alloyed steels that have been specially heat-treated to enhance their mechanical properties. These properties include high hardness, fatigue resistance, and good dimensional stability. The wire is drawn, formed, and further processed to achieve the required dimensions and properties for bearing applications.
Manufacturers carefully engineer bearing steel wire to ensure it meets the demanding requirements of various bearing applications, as different types of bearings (such as ball bearings, roller bearings, and thrust bearings) have unique load capacities, operational conditions, and performance expectations.

Application of bearing wire
Bearing wire is mainly used to manufacture bearing rolling elements, including balls, roller needles and tapered rollers, etc.
In summary, bearing steel wire is a specialized type of steel wire used in the production of bearings, providing them with the necessary strength and durability to function effectively under various operating conditions.

The following are some examples of Chinese, British, American and Japanese national standards for bearing steel wire:
Chinese standard:

GB/T 18254-2016 "High Carbon Chromium Bearing Steel" This standard applies to hot-rolled and forged high-carbon chromium bearing steel for making bearing rings and rolling elements Disc)

British Standard:
BS 970-2:1991, Specification for Bearing Steels

American standard:
ASTM A295/A295M, Standard Specification for High-Carbon Anti-Friction Bearing Steel

Japanese standard:
JIS G 4805, High Carbon Chromium Bearing Steels
These national standards cover the requirements for materials, chemical composition, mechanical properties, heat treatment, etc. of bearing steel wire rods.

The allowable error of bearing steel wire is usually regulated by different national standards, which specify the allowable error of wire diameter, roundness, surface quality, etc.

In the Chinese national standard (GB/T 18254-2016), for bearing steel wire, the allowable error of diameter is usually in accordance with the following regulations:
The allowable error for diameters below 1mm is ±0.010mm.
The tolerance is ±0.015mm for diameters between 1mm and 3mm.
The allowable error is ±0.020mm for diameters between 3mm and 10mm.
The tolerance for diameters between 10mm and 25mm is ±0.025mm.