1. the rotational speed of the bearing and temperature rise
With the development of science and technology, machine tool spindle speed high speed increasing the scope, therefore, on high speed stability requirements of NSK bearings are also getting higher and higher. Machine tool spindle bearings are important factors for limit bearing speed of temperature rise. Typically, proper selection of bearing type, tolerance class, how it is configured, clearance (preload), lubricant and lubrication method, to a certain extent improve high-speed rolling bearing performance.
2. the life of bearings and bearing capacity
For most machine tools, mainly refers to the life of the spindle components maintain accuracy of spindle use the term and, therefore, maintain performance meets requirements of NSK bearings precision spindle component life requirement. For heavy-duty machine tools or heavy cutting machine tool, you should first consider the carrying capacity of the bearings.
3. the stiffness of the bearing and vibration resistance
To ensure the machine processing quality, must have sufficient rigidity of the spindle system, or a more complex mapping error will occur even flutter. Vibration resistance refers to the ability to resist forced vibration and self-excited vibration. Vibration resistance depending on the spindle and spindle components bearing stiffness and damping. Spindle of preloaded rolling bearing can effectively increase the rigidity of the system.
4.NSK bearing noise
High speed grinder, grinding head bearing noise is the main ingredient in the overall noise level should use low-noise rolling bearings.