In the fields of industrial components and precision mechanical transmission, the choice of material directly determines the durability and high performance of the product. 440C high-hardness martensitic stainless steel, with its superior properties, has become the preferred material for many demanding bearing products. As a representative grade of martensitic stainless steel, 440C, after professional heat treatment, achieves the highest hardness among all stainless steels and heat-resistant steels. Its excellent hardness and wear resistance allow it to perform stably even in high-load and corrosive environments, making it a core material for manufacturing various high-quality bearings.
In everyday industrial and residential settings, stainless steel door hinges and door ball bearings are crucial components ensuring smooth door opening and closing.
For mechanical equipment with specific size requirements, 17 x 37 x 12 bearings are common precision parts, widely used in small motors, transmission equipment, and other fields.
In mechanical equipment requiring support and rotation, stainless steel pillow block bearings play an important role, commonly used in conveyor machinery, packaging equipment, and similar applications.
With the continuous development of precision instruments, the demand for stainless steel miniature ball bearings is increasing. They are widely used in medical devices, electronic equipment, precision instruments, and other fields with stringent requirements for size and precision. Miniature ball bearings have small ball sizes and high precision requirements. The high hardness and uniform metallographic structure of 440C stainless steel ensure the smoothness and stability of the miniature balls during rotation, avoiding jamming or failure due to material defects. At the same time, the corrosion resistance of 440C stainless steel also meets the hygiene and environmental adaptability requirements of medical devices and electronic equipment, ensuring the safe and reliable operation of the equipment.
In certain specialized fields, such as security equipment and sports equipment, 9mm blank bank bearings also have specific applications. This type of bearing requires high strength and wear resistance of the base. The high hardness of 440C stainless steel ensures that the base of the 9mm blank bank bearing has sufficient load-bearing capacity and wear resistance, maintaining structural integrity even under frequent use or minor impacts, providing a fundamental guarantee for the safe use of equipment.
440C steel is one of the main raw materials for bearing production at the BLH BEARING plant. In the American standard, 440C stainless steel belongs to the 440 stainless steel series, which includes four grades: 440A, 440B, 440C, and 440F. The carbon content of 440A, 440B, and 440C increases sequentially, resulting in greater hardness. 440F is a free-machining steel with increased sulfur content compared to 440C. In China, the corresponding grades for 440C are 9Cr18 and 9Cr18Mo, etc. These corresponding grades of stainless steel also possess excellent hardness and corrosion resistance, serving as high-quality alternatives to 440C stainless steel and providing more options for the production of various bearing products.
Stainless steel 440C bearing 68 series bearing model list: S681 S682 S683 S684 S685 S686 S687 S688
