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Machine Drawing by N. D. Junnarkar

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Chapter 15

Spur Gears

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This chapter contains information about spur gears

After reading the chapter you will be able to

  • understand the use of gears in power transmission
  • classify gears
  • construct an involute gear tooth profile
15.1 GEARS

Gears are components used in the assembly of machines for transmission of power and motion. The gear drive provides motion and power transmission just like the belt drive, chain drive, and rope drive. Gears being solid metallic components, they provide fixed velocity ratio in assemblies. Velocity ratio is the ratio of speed of the driving pulley/shaft to the driven pulley/shaft. Hence, with a gear drive it ...

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