Machine tool spindles usually need to withstand high speeds and loads, so commonly used bearings need to have characteristics such as high-speed operation, high load-bearing capacity, and high stiffness. Common bearings used in machine tool spindles include:
1. Angular contact ball bearings: Angular contact ball bearings are composed of spherical raceways and spherical rollers between the inner and outer rings, which can withstand radial and axial loads and are suitable for high-speed running bearings. This type of bearing has high stiffness and high speed characteristics, and is commonly used in the spindle of high-speed and precision machine tools.
2. Cylindrical roller bearings: Cylindrical roller bearings are composed of cylindrical raceways and cylindrical rollers between the inner and outer rings, which bear large radial and axial loads. This type of bearing has strong load-bearing capacity and is suitable for machine tool spindles that operate under heavy loads and at low speeds.
3. Self aligning roller bearings: Self aligning roller bearings are composed of raceways and rollers between the inner and outer rings, which can automatically adjust the relative tilt between the bearing and the shaft. They are suitable for bearing radial and axial loads, especially for situations where the spindle is subjected to uneven loads and impact loads.
4. Deep groove ball bearings: Deep groove ball bearings are composed of spherical raceways and spherical rollers between the inner and outer rings, suitable for bearing radial and axial loads. They have the characteristics of low friction, high speed, and high precision, and are commonly used in general machine tool spindles.
5. Angular contact roller bearings: Angular contact roller bearings are composed of raceways and rollers between the inner and outer rings, and can withstand large radial and axial loads. They are suitable for high-speed and high-precision machine tool spindles.
The above bearing types are selected according to different machine tool types, working requirements, and load conditions to meet the needs of high-speed, high-precision, and stable operation of machine tool spindles.