| 11. | Since that time, the production of roller bearings has grown constantly.
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| 12. | Roller bearings were used at the crankshaft ends; the remaining five were plain.
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| 13. | However, it is rugged and roller bearings are used in the aperture mechanism.
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| 14. | The gears are usually plain spur gears, running in roller bearings.
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| 15. | Common roller bearings use cylinders of slightly greater length than diameter.
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| 16. | In the 1930s the introduction of practical locomotive haulage in roller bearing wheels.
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| 17. | The bogies and bissels both had Timken roller bearing axle boxes.
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| 18. | Others will add roller bearings for the main pivot also.
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| 19. | Toroidal roller bearings were introduced in 1995 by SKF as " CARB bearings ".
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| 20. | Heavy-duty roller bearing are housed in a removable bearing cartridge.
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