Spindle, lead screw with precision bearings as the machine tool’s basic accessories, its performance directly affects the machine tool’s speed, rotary accuracy, rigidity, anti-vibration cutting performance, noise, temperature rise and thermal deformation, and then affect the machining parts precision, surface quality, etc..

Precision bearing assembly site should be kept as clean as possible;

Avoid the entry of precision bearing pollution or foreign matter, pollutants have a great adverse effect on the operation and service life of bearings;

Check the geometric accuracy, dimensional accuracy and cleanliness of the bearing seat hole and the mating surface on the shaft;

When installing, the matching surface of the ring is coated with a little oil or a little grease, so that the precision bearing is easier to install to the design part;

When designing the bearing seat hole and shaft, there should be a 100 ~ 150 installation guide chamfer;

Do not overcool the bearing, because condensation can lead to corrosion of the bearing and bearing mating surface;

Bearing inner ring and spindle assembly should adopt directional assembly method or Angle selection method, that is, artificially control the direction of radial runout error of each assembly part, so that the errors cancel each other rather than accumulate;

Bearing pressed into the bearing should be flexible rotation without block feeling;

After installation, check whether the precision bearing system works normally.

2. Use installation tools properly

A. When the interference is large, the heating box, oil bath heating or inductor heating bearing can be used to install, the heating temperature range is 80℃ ~ 100℃, the maximum can not exceed 120℃. At the same time, the application of nuts or other appropriate methods to tighten the bearing, in order to prevent the bearing cooling after the width direction of contraction and the gap between the ring and the shaft shoulder.

B. When the bearing is installed, equal pressure must be applied on the circumference of the end face of the ring, and the ring must be pressed into it. It is not allowed to knock the end face of the bearing directly with the tools � In the case of small interference, the end face of the bearing ring can be pressed by the sleeve at normal temperature, and the center of the assembly sleeve can be tapped with the � head to balance the ring through the sleeve Assembly force must not be transmitted through the rolling body, to avoid direct hammering bearing rings. When pressing in, it should be ensured that the outer ring end face and shell shoulder end face, the inner ring end face and shaft shoulder end face are pressed tightly, no clearance is allowed.

C. Mechanical press or hydraulic press must be pressed with assembly sleeve, and ensure that the horizontal state, such as tilt will lead to bearing groove damage due to force, resulting in abnormal bearing sound. The assembly sleeve should completely contact the whole circumference of the bearing inner ring or outer ring end face.

If you have any questions,pls feel free to contact us.

e-mail:bearing6@hyzcgroup.com