Calculated Bearing Lifetime

Laakerin laskennallinen käyttöikä

The table shows the calculated service life of commonly needed equipment. EP-Calculation calculates the service life of the bearings and combines the information with the service life of the equipment.

This is due to the fact that the equipment structures are designed for such a stress level that fatigue does not show up in the load factor of the product's life cycle. In practice, the stress level corresponds to the fact that the load does not cause fatigue, i.e. the machine wears without tiring.

Bearing Lifetime in Hours

Household appliances generally                        500 -    2 000

Devices which used occasionally                    2 000 -    4 000
- cars

Elevators (Lifts)                                               8 000 -   12 000

Conveyors and small electric motors             12 000 -   20 000

Several track-laying vehicles                          20 000 -   40 000

Large electric motors and pumps                    80 000 - 200 000

Power Plant Generators

Ship propellers bearings

Lifetime in Kilometers

Wheel bearings on a road vehicle                          

- Passenger vehicles                                             200 000

At present, many car models are not performing the required service life in km. This is due to the bearings lack of protection against water and dirt.

- Trucks and buses                                                 300 000 ..

Railway carriages over short distances       800 000 - 1 500 000

Railway carriages on long journeys                     3 000 000

Locomotives over short distances               3 000 000 - 4 000 000

Electric and diesel locomotives

long distances                                             3 000 000 - 5 000 000