116 Series

The performance and quality of raw materials have a great influence on the performance and service life of bearings. AUB only uses bearing raw materials from qualified suppliers. We will carry out strict inspection on bearing forgings, including ultrasonic inspection, hardness inspection and metallographic inspection. Most slewing rings use 42CrMo, 50Mn as raw materials, GCr15 bearing steel is usually used for small sizes, and AUB can also produce slewing ring bearings with customized materials such as stainless steel and coated aluminum alloys.

GCr15 steel

For precision slewing bearing materials, such as cross roller bearings, harmonic reducer bearings, etc., AUB uses GCr15 bearing steel as raw material. GCr15, as a representative steel grade of high carbon chromium bearing steel, has less alloy content and good comprehensive performance. GCr15 bearing steel has high hardness, uniform structure, good wear resistance and good contact fatigue performance after quenching and low temperature tempering. Usually used in the manufacture of precision bearing rings and rolling elements.

The normal quenching temperature of GCr15 steel is 830-860°C.
The tempering temperature of GCr15 steel is generally 160-180°C.

GCr15 steel has good hot workability, moderate cold workability and general cutting performance. In addition, GCr15 has poor weldability and temper brittleness. As a bearing steel, GCr15 has high requirements on smelting quality, and the content and distribution of sulfur, phosphorus and non-metallic inclusions need to be strictly controlled, which has a great impact on the service life of bearing steel.

50Mn

For slewing bearing materials, AUB usually uses 50Mn or 42CrMo as raw materials. 50Mn is a high-quality carbon structural steel. It has high strength, elasticity and hardness, and is often used after quenching and tempering treatment. The welding performance of 50Mn is poor, and it has a tendency of overheating sensitivity and temper brittleness. 50Mn is usually used in the manufacture of parts that require high wear resistance and load carrying capacity, such as gears and gear shafts.

42CrMo steel

42CrMo material is an alloy steel, very suitable for forging processing. It has high strength, high hardenability and good toughness. 42CrMo has small quenching deformation, high creep strength and durable strength at high temperature. Compared with 50Mn, 42CrMo has better fatigue durability, but its cost is higher.