How many bearings are there on a hydraulic excavator?

A tracked hydraulic excavator requires about fifty bearings for its basic operation (travel and rotation).

Irrespective of its size and its use (earthwork, mining, demolition), it is made up of a crawler track chassis topped with a superstructure including the engine, hydraulic components (pump, motors, cylinders), the driving cab and the attachment (arm, boom, dipper, bucket).

hydraulic excavator bearings include: Crawler Excavator walking bearing, excavator slewing bearing, excavator needle roller bearing, excavator gearbox bearing, excavator walking motor bearing, excavator walking drive bearing, excavator spherical plain bearing, excavator slewing support bearing and English non-standard bearing used on excavator.


The two track sets are each driven by a planetary reducer using 2 angular contact ball bearings or tapered bearings – for supporting the reducer – and 14 needle roller bearings – for planet gears.

32 bearings are thus necessary so that the machine can move.


The superstructure pivots 360° thanks to a slewing ring of about 1.50 m diameter fixed on the straight truck chassis and a hydraulic motor or a planetary reducer. This includes 12 needle roller bearings for the planet gears and 2 spherical roller bearings for the shaft support.

14 bearings contribute to the swing of the superstructure.

Note that the plain bearings equip the various joints located on the boom, the dipper and the bucket.

Crawler Excavators Also have many kinds of design according to the special situations

— Standard Crawler Excavators

— Intelligent Machine Control

— Hybrid Crawler Excavators

— Short Tail Swing Crawler Excavators

— Demolition Crawler Excavators

— Super long Front Crawler Excavators

Quiet, safe and reliable. The environmentally friendly crawler excavators are also simple to operate and probably the most efficient around. It’s no wonder they’re among the top selling hydraulic excavators in the world.

Here, you can find a number of offers for your crawler excavators bearings. For information about the full range of excavator bearings offers, and to find a specific solution for your needs, please contact us.