| 11. | The gears are usually plain spur gears, running in roller bearings.
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| 12. | Since that time, the production of roller bearings has grown constantly.
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| 13. | Roller bearings go into products ranging from automobiles to hair dryers.
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| 14. | Roller bearings were used on all the locomotive and tender wheels.
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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. | If anything, the inside of the wrench looks exactly like a needle roller bearing.
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| 19. | Axle to spring connection was again with fitted roller bearings.
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| 20. | Ball and roller bearings also began being used in machinery.
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