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Joanna
27 February 2020 / Published in EXPERT ADVICE, GUIDES

What is the travel final drive main bearing?

What is the travel final drive main bearing and where we can buy it?

The final drive main bearing of the excavator is a rolling bearing, usually asymmetrical and angular. It is designed to minimize frictional resistance during planetary gear operation. The reducer/hydromotor bearings found in excavators with a weight range of 1.5-50 are usually divided into two types: tapered roller bearings and angular contact bearings.

The angular bearing is constructed in such a way that the inner and outer tracks are asymmetrically positioned. This is to reduce the working area of ​​the reducers and increase the pressure resistance. There are two types of angular-contact bearings in excavators: single-row and double-row. They differ in that for a final drive using single row bearings we must install two bearings. This bearings have to be separated by a seager. On the other hand, for the reducer with a double-row bearing we install one secured on seager or on shots.

The angular-contact ball bearing has an open structure to maximize oil flow while minimizing friction.

Bearings of this type are very sensitive to the lack or poor quality of the oil. In addition, due to the asymmetrical design of the bearing, it is virtually impossible to remove it from the radiators without damaging. Mostly the bearing balls spill out.

There are only a few bearing manufacturers of the reducer on the global market. Hence there is such a big problem in their purchase and a fairly prohibitive purchase price.

We will pay between 30 € and 1000 € for the asymmetric bearing of the medium-class hub. Ofcourse, it depending on the type of bearing and its size. Hence, such big problems in the valuation of repair of this type of components. These types of bearings can be purchased from companies that specialize in the import of specialized parts for construction machinery or services. Our company has a really wide range of bearings, especially those hard to reach. If you are looking for a bearing, please contact our dealer who will provide you with professional assistance.

What you can read next

Cylindrical roller bearings – what distinguishes them from other bearings?
Guide: disassembly and assembly of the driving hydromotor
Swing motor leaks – causes and consequences

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