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Stainless Steel Bearings

The ferrule and rolling element are stainless steel 440, and the hardness is HRC61-64. The cage, the dust cover and the seal frame are stainless steel AIS304.
The advantages of stainless steel bearings
1. Excellent corrosion resistance: Stainless steel bearings are not easy to rust and have strong corrosion resistance.
2. Washable: Stainless steel bearings can be washed down without having to relubricate to prevent rust punishment.
3. Can run in liquid: Due to the materials used, we can run bearings and bearing blocks in liquid.
4. Slow depletion speed: AISI 316 stainless steel does not need oil or grease anti-corrosion protection. Therefore, if speed and load are low, no lubrication is required.
5. Hygiene: Stainless steel is naturally clean and non-corrosive.
6. High heat resistance: Stainless steel bearings are equipped with high-temperature polymer cages or cages that are not in a complete complement structure, and can run at higher temperature ranges from 180 ° F to 1000 ° F. (Requires high temperature grease)
Second, the difference between 304 and 440 stainless steel bearings
Stainless steel bearings are now divided into three materials: 440, 304, and 316. The first two are more common stainless steel bearings. The 440 material is definitely magnetic, which means that it can be sucked. 304 and 316 belong to micro-magnetism (many people say that it is incorrect that it is not magnetic), that is, it cannot be sucked by a magnet, but you can feel a little suction. Generally stainless steel bearing housings are made of 304 material. So the material of stainless steel bearing seat is 304 or 440?
304 is the most widely used stainless steel. Compared with 440, its price is lower than that of 440, and its corrosion resistance and mechanical properties are considered. The comprehensive properties are comprehensive, so it is widely used. The disadvantage is that no further heat treatment can be performed to change its properties.
440 is a high-strength cutting tool steel (endnotes A, B, C, F, etc.), which can obtain higher yield strength after appropriate heat treatment, and is among the hardest stainless steels. The most common application example is the "razor blade".