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# Bearings

Bearings. SKF GX series Steel/PTFE. Rolling bearings. Dynamic rating C dyn of a rolling bearing is the load that will probably start damage to 10% of a large population of bearings after one million rotations.

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## Bearings

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1. Bearings

2. SKF GX series Steel/PTFE

3. Rolling bearings

4. Dynamic rating Cdyn of a rolling bearingis the load that will probably start damage to 10% of a large population of bearings after one million rotations.

5. Dynamic rating Cdyn of a rolling bearingis the load that will probably start damage to 10% of a large population of bearings after one million rotations. For balls the life increase is the load decrease raised to the power 3.0.

6. Dynamic rating Cdyn of a rolling bearingis the load that will probably start damage to 10% of a large population of bearings after one million rotations. For balls the life increase is the load decrease raised to the power 3.0. For rollers the life increase is the load decrease to the power 3.3

7. Dynamic rating Cdyn of a rolling bearingis the load that will probably start damage to 10% of a large population of bearings after one million rotations. For balls the life increase is the load decrease raised to the power 3.0. For rollers the life increase is the load decrease to the power 3.3 Half load = 10 times life

8. SKF say that only 1% of bearings fail for that reason. They now also quote a fatigue load for infinite life. Most fail because of their seals.

9. Hydrostatic bearings

10. Q = flow m3/sec P = Pressure N/m2 W = slit width h = slit gap d= pipe diameter S = triangle side L = length all in metres

11. Viscous force F = Area . Velocity . Absolute viscosity gap But remember that viscosity is a strong function of temperature

12. Special bearing

13. Duck-to-spine bearing specification. Force in 10 metre htc wave = 30MN (3000 tonne)

14. Duck-to-spine bearing specification. Force in 10 metre htc wave = 30MN (3000 tonne) Zero friction

15. Duck-to-spine bearing specification. Force in 10 metre htc wave = 30MN (3000 tonne) Zero friction Infinite life

16. Duck-to-spine bearing specification. Force in 10 metre htc wave = 30MN (3000 tonne) Zero friction Infinite life Working in sea water

17. Duck-to-spine bearing specification. Force in 10 metre htc wave = 30MN (3000 tonne) Zero friction Infinite life Working in sea water 100 mm tolerance

18. Duck-to-spine bearing specification. Force in 10 metre htc wave = 30MN (3000 tonne) Zero friction Infinite life Working in sea water 100 mm tolerance Diameter = 14 metre Length = 45 metre

19. Duck-to-spine bearing specification. Force in 10 metre htc wave = 30MN (3000 tonne) Zero friction Infinite life Working in sea water 100 mm tolerance Diameter = 14 metre Length = 45 metre Pressure = 0.45 bar

20. Power take offPumps

21. Motors

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