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Calculated Bearing Lifetimefinnish_translation.jpg

Laakerin laskennallinen käyttöikä

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The table shows the calculated lifetime for the  devices commonly required. EP-Calculation calculates the lifespan of the bearings and connects the data to devices functional age.

This is because, the device structures are dimensioned having the stress level at which fatigue does not appear in the product life-term load numberIn practice, the stress level is equal to one that fatigue does not appear from the load, ie the machine wears without getting tired.

 

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

Bearing lifetime in hours or kilometers can be set relative. This is because it becomes easier comparison between the devices. The ratio between one hour (60 minutesand 100 km is 1.618, ie the golden section (1.9% accuracy). Table abovesuch as bearing manufacturers in the average presented.

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