Silicon Nitride Bearing Ball Used for High-speed Bearings

Brief

Silicon nitride made all ceramic bearings are suitable for higher speeds and load capacities, as well as for higher ambient temperatures. At the same time, precision ceramic bearings for high-speed, high-precision, and high rigidity spindles can be provided.

Details

Characteristics of Silicon Nitride Ball

• 1. High speed: It has the advantages of cold resistance, low elasticity under stress, high pressure resistance, poor thermal conductivity, light weight, and low friction coefficient. It can be applied to high-speed spindles and other high-precision equipment ranging from 12000 rpm to 75000 rpm;
• 2. High temperature resistance: The material itself has a high temperature resistance of 1200 ℃ and good self-lubricating properties. It does not expand due to temperature differences between 100 ℃ and 800 ℃ during use. Can be applied in high-temperature equipment such as furnaces, plastic making, steel making, etc;
• 3. Corrosion resistance; The material itself has the characteristic of corrosion resistance and can be applied in fields such as strong acid, strong alkali, inorganic, organic salt, seawater, etc., such as electroplating equipment, electronic equipment, chemical machinery, shipbuilding, medical equipment, etc.
• 4. Antimagnetic: Due to its non-magnetic nature, it does not attract dust, which can reduce premature bearing peeling and high noise. Can be used in demagnetization equipment. Precision instruments and other fields.
• 5. Electrical insulation: Due to high electrical resistance, it can prevent arc damage to bearings and can be used in various electrical equipment that require insulation.
• 6. Vacuum: Due to the unique oil-free self-lubricating properties of ceramic materials, silicon nitride all ceramic bearings can overcome the problem of lubrication that ordinary bearings cannot achieve in ultra-high vacuum environments.
• 7. Compared to bearing steel, its self-weight is 30%-40% of that of bearing steel, reducing the increase in dynamic body load and slippage caused by centrifugal force. Due to its high wear resistance and rotational speed being 1.3~1.5 times that of bearing steel, it minimizes surface damage to grooves from high-speed rotation. Its elastic modulus is 1.5 times higher than that of bearing steel, resulting in lower stress elasticity and reduced deformation under high loads. With hardness twice that of bearing steel, it decreases wear. Its compressive strength is 5~7 times that of bearing steel, and its thermal expansion coefficient is 20% lower than that of bearing steel. The friction coefficient is 30% lower, reducing heat generated by friction and preventing premature bearing spalling failure due to high temperatures. Its tensile and bending strength are equivalent to that of metal.

Application of Silicon Nitride Ball

Silicon nitride balls are widely used in high-precision bearings, seals, mechanical parts, and other fields. In the field of bearings, silicon nitride balls have high precision, high hardness, and high wear resistance, which can significantly improve the service life and accuracy of bearings. In the field of seals, silicon nitride balls have good corrosion resistance and high temperature stability, and can be used for sealing in various harsh environments. In the field of mechanical parts, silicon nitride balls can be used to manufacture various high-precision and high hardness parts, such as bearing sleeves, shaft sleeves, etc.

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