| 11. | Spur gears are excellent at moderate speeds but tend to be noisy at high speeds.
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| 12. | Spur gears make a characteristic whine at high speeds.
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| 13. | It applies to spur gears, parallel axis or crossed axis helical gears, and worm gearing.
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| 14. | From Aug . 96 through Jan . 98 there have been 22 spur gear related mishaps.
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| 15. | The remaining length of a given pinion meshes with the nearer spur gear on its axle.
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| 16. | Sliding spur gears offered forward speeds of 1.5, 3, 5 and 8 mph, and a reverse.
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| 17. | The last spur gear has a small pinion gear on its underside, engaging the axle's crown gear.
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| 18. | A spur-gear differential has two equal-sized spur gears, one for each half-shaft, with a space between them.
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| 19. | In spur gears, teeth suddenly meet at a line contact across their entire width causing stress and noise.
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| 20. | They used similar mechanisms to transmit power from the engine to the wheels, typically large, exposed spur gears.
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