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63mm Solid Series 25 (Ungeared)

SUN25 Series Solid Section Ungeared

The ungeared bearings in this series have a constant height of 63mm only as both rings are of equal size. However, the bolt and pilot diameters equal those of the geared bearings which can be useful if a range of machines requires flexibility in design for powered or unpowered versions. Tolerances are machined to IT9 grades.


80SLS25 Series datasheet HERE 


SUN 855 25   SUN 955 25   SUN 1055 25   SUN 1155 25   SUN 1255 25   SUN 1355 25
SUN 1455 25   SUN 1555 25


Will be made available on request




All bearings manufactured in 42CrMo4

Grease points

All bearings supplied with at least 2 grease points in the outer ring, DIN 71412 M8x1.

For relubrication consider using the GreaseMax Automatic lubricators.

Load and bolt limit curves

Bearings should operate within the prescribed triangular area at all times.

The bolt limit curve is based on the use of Grade 10.9 bolts. 

If the load is suspended, or the axis of rotation is not vertical, refer the application details to

Interchange information

These tables offer generally accepted interchange information. However, variations exist and all queries should be referred to our Techniocal Department for analysis.

Dimensional equivalence does not always imply equal performance!

Due to the search for continuous product improvement these specdification may change without notice.


For professional assistance contact the NBC Slewing ring experts on +44 (0)1952 222300, by fax on +44 (0)1952 242938 or e-mail


Whilst every effort has been made to ensure the accuracy of the information on this website, if you spot a mistake please inform the Thanks!