Stainless steel bearing with seat is a precision component widely used in corrosion-resistant scenarios such as food machinery and chemical equipment. Its core feature is that both the bearing and the seat are made of stainless steel material (such as 304 or 440C), which has the characteristics of rust prevention, corrosion resistance, and easy cleaning. The core difference between stainless steel bearing with seat and ordinary bearing lies in the material characteristics and application scenarios. The following is a key comparison:
1. Material and corrosion resistance
Stainless steel bearing with seat: made of 304, 316 or 440C stainless steel material, with high chromium content (such as 440C containing 1.2% carbon and 16-18% chromium), possessing strong rust and acid alkali resistance, can be directly washed with water or used in humid and corrosive environments
Ordinary bearings: mostly made of bearing steel (such as GCr15), with high carbon content to enhance wear resistance, but without rust prevention ability, requiring additional lubricating grease protection
2. Mechanical performance and load capacity
Stainless steel bearings: The hardness varies with the material (440C has the highest hardness, but 316L is lower), and the load-bearing capacity is slightly lower than that of bearing steel, but the stability is better and the noise is lower
Ordinary bearings: Their dynamic load capacity is 30% higher than that of stainless steel bearings of the same size, making them suitable for heavy-duty scenarios such as machine tool spindles
3. Application scenarios
Stainless steel bearing with seat: fields requiring anti-corrosion or cleanliness such as food machinery, medical equipment, chemical equipment, etc
Ordinary bearings: heavy-duty equipment in dry environments (such as automotive transmissions)
4. Cost and Maintenance
Stainless steel bearings: The price is 2-3 times that of bearing steel, but the maintenance cost is low (lifetime lubrication design is common)
Ordinary bearings: need to be regularly coated with anti rust grease, which is prone to failure in humid environments
5. Temperature adaptability
Stainless steel bearings can operate at -60 ℃~+300 ℃, while ordinary bearings are prone to oxidation at high temperatures
