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Spindle Bearings

Spindle bearings are special high-precision, high-speed, rolling ball and roller bearings for spindle mounting. The spindle is usually statically mounted in two radial and one axial bearing. The front bearing is usually axially immovable, the rear one is allowed axial movement due to the thermal expansion of the spindle.

Three types of bearings are used – ball bearings with angular contact, double-row roller bearings or axial bidirectional ball bearings with angular contact.

Spindle bearings in use

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Basic Range of Spindle Bearings

  • Ball bearings with angular contact
  • Double-row roller bearings
  • Axial double direction ball bearings with angular contact
  • Four point bearings
  • Combined bearings
  • Complete spindles

Bearings Construction

Spindle Bearing Construction

  1. Inner ring
  2. Outer ring
  3. Cage with balls (or rollers)

Bearings Fields of Use

Spindle bearings are used for spindle mounting and other high-precision high-speed drives.

They are typically used for machine tools, lathes, milling machines, drills, machining centers, motor spindles and grinders of all kinds and purposes.

Spindle Bearings Types Overview

Bearing Type Description Illustration

Single-Row Ball Bearings with Angular Contact

Single-row angular contact ball bearings have been developed for high-speed machine tool spindles.
They differ from normal angular contact ball bearings by their contact angle, degree of accuracy and cage design.

They differ from normal angular contact ball bearings by their contact angle, degree of accuracy and cage design.

Double-Row Roller Bearings

Thanks to two rows of rollers, double-row roller bearings have very high rigidity and load capacity, which is why they are used for the transmission of large radial loads and medium-high speeds.

They are usually used for rear spindle bearings, for lathe spindles that have high demands on rigidity.

Axial Double Direction Bearings with Angular Contact

Axial double direction ball bearings have a contact angle of 60° and are axially preloaded. Therefore, they have high axial load capacity and rigidity.

They are mainly used for front spindle mounting.

Documents for Download

High Precision Bearings - Preview

High Precision Bearings

English (PDF 4.12 MB)


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