1. high speed collaboration and clearance of FAG bearings because of high speed machine tool bearings bearings as well as required by the high-precision bearings, and requested by the FAG bearing at high temperature, so when you consider its fit and clearance to take into consideration the following two points:
(1) increased from room temperature to high temperature of size and hardness changes;
(2) high speed centrifugal force caused by the force system and shape change.
In short, at high speed, high temperature conditions, from selection and clearance of fit to seek to keep the FAG bearings on precision and performance, it is difficult.
In order to ensure that FAG bearings after installation of raceways and small deformation, interference interference fit cannot be made too large, and thermal expansion of high speed centrifugal force and under high temperature, or offset normal to the mating surfaces of the pressure. Or relax the mating surfaces, interference must therefore take into account the above two factors of these rules carefully calculated, at room temperature under normal speed effective interference for high-speed FAG bearings may be invalid.
If the calculation result that contradiction too large (only under ultra high speed is often the case), take the ring of lubrication with static pressure lubrication method of dual lubricating measures, which have the potential to DMN value of FAG bearings break 3 million mark.
High velocity FAG bearing clearance should not only take into account the various factors mentioned above, and taking into account the effect of the thermal elongation of the shaft on clearance, required FAG bearings under work, best at working temperatures of clearance, and this clearance, the outer ball Groove Center, is exact on the formation of the State. Due to the high speed bearing seeks to reduce the relative sliding and internal friction, inner and outer rings is not the best method to adjust the ball along the axial direction relatively dislocation FAG bearing clearance.
In considering the FAG bearings when combined with interference and clearance, to note that the material has become loose and deformation characteristics in high temperature, as well as several times from room temperature to high temperature and temperature changes in a certain possibility of permanent deformation.
2. requirements for host-related parts
Rotary system of the high speed requirements of FAG bearings bearings precision dynamic balancing, part of shaft and hole mounting bearings should have the dimensions and geometrical precision than the General requirements, in particular with the shaft and abutment on the hole or axle verticality, and at the time of consideration of these issues, must also noted high speed and high temperature factors of FAG bearings is running.
Axis support system requires both high rigidity and quality of light as much as possible, to overcome this contradiction, you can take such as reduced surface roughness and surface hardening, such as measures to improve the supporting stiffness, use of hollow shaft to reduce the quality of the system.




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