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Company News >> What are the main materials used in slewing bearings?

 Slewing bearings are generally divided into materials for ferrules and rolling elements. Sleeve bearing ferrules are made of surface hardened steel. They are generally made of 50Mn steel. 
 
Sometimes customers have special requirements, or sometimes they are used to meet some special applications. Needs, such as slewing bearings used under special conditions, Other grades of surface hardened steel, such as 42CrMo, 5CrMnMo, etc., may also be selected 
according to the specific use conditions provided by the user.
 
 
The cage for the slewing bearing has an integral type, a segmented type, an isolation block type and the like. The integral and segmented cages are made of 20 gauge steel or ZL102 cast aluminum alloy. The spacer block is made of polyamide 1010 resin, ZL102 cast aluminum alloy, and the like. 
 
In recent years, with the continuous development of the material industry, nylon GRPA66.25 has also been promoted and applied in the design of segmented cages.
 
The material for the slewing bearing seal is made of oil-resistant butadiene rubber. The material for the slewing bearing seal is made of oil-resistant butadiene rubber. The code of the ferrule material and the blank supply status is as specified in the table. The “T” in the table 
indicates that the ferrule blank is supplied in the tempered state, and the “Z” indicates the ferrule blank. Supply in normalized state. The center circle diameter of the rolling element is 3150mm, the ball diameter is 75mm, the gear modulus is m=20mm, the ferrule material is 50Mn, and 
the internal gear type four-point contact ball made of the blank material is in the normalized state. Cheng expressed as 013.75.3150.12. The above is only the general case, but sometimes, the slewing ring used under a special condition, such as special temperature, such as -300C~+700C, works normally, users need to adapt to lower or higher temperature slewing ring, and turntable If the bearings are used in particularly harsh environments, such as maritime climate, dust or abrasive particles (dust, cement, coal powder), etc. Special seals, guards, and suitable oil passages must be used. Our engineers Special slewing bearings are also available.