Types  of Bearing Arrangements

 

 

Abstract:

To increase the load capacity and rigidity, the angular contact ball bearings for machine tool spindle are usually matched in pairs or set of more units.

 

 

Key words: Bearing arrangement; duplex arrangement; multiple arrangement; universal bearing; matched bearing; back-to-back (DB); face-to-face (DF); tandem (DT); bearing in pairs.

 

 

To increase the load capacity and rigidity, the angular contact ball bearings for machine tool spindle are usually matched in pairs or set of more units.

Every single bearing to be matched should meet the requirements of boundary dimension tolerances and running accuracy. Besides, there are high requirements for the following performance parameters between any two bearings:

(1) Mean bore diameter difference between any two bearings.

(2) The radial runout difference of inner rings between any two bearings.

(3) Mean outside diameter difference between any two bearings.

(4) The radial runout difference of outer rings between any two bearings.

(5) Actual contact angle difference between any two bearings.

(6) The protrusion difference between any two adjacent bearings.

 

Duplex arrangement

Duplex arrangement bearings have three kinds of configuration, back-to-back (DB), face-to-face (DF)and tandem (DT), their structures and features are shown as follows:

 

Multiple arrangement

To obtain higher loading capacity and rigidity, the angular contact ball bearings for machine tool spindles are in sets with three, four and even five bearings. Among them, the drawings below show a few examples of multiple arrangements.

 

Universal Bearings

Except for the above constant direction configurations, we can also support universal matching bearing. The same set of universal matched bearings can be arranged in any required arrangement DB, DF or Tandem. The protrusion amount at both ends of a single universal matched bearing is exactly the same.

The preload of universal matched bearings is also divided into light, medium, heavy and special loads.

 

To learn more about BRZB bearings, please visit www.brzbearing.com or send email to sales@brzbearing.com.