Gears

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Gears

  1. 1. Gears
  2. 2. GearsGears are toothed wheels that are used totransmit constant angular velocity ratiobetween two shafts. These shafts can beparallel, intersecting or non-intersecting.
  3. 3. Classifications• Gears connecting parallel shafts (parallel axes gears)• Gears connecting intersecting shafts (intersecting axes gears)• Gears connecting neither parallel nor intersecting shafts (nonintersecting axes gears)
  4. 4. Spur Gear
  5. 5. Helical Gear
  6. 6. Herringbone Gear
  7. 7. Rack and Pinion
  8. 8. Internal Gear
  9. 9. Straight Bevel Gear
  10. 10. Spiral Bevel Gear
  11. 11. Crossed Helical Gears
  12. 12. Hypoid Gears
  13. 13. Worm and Worm Gear
  14. 14. Spur GearSpur gears are toothed wheel with radiallyarranged teeth parallel to the shaft axis.
  15. 15. External Gear
  16. 16. Internal Gears
  17. 17. Spur Gear Nomenclature
  18. 18. Fundamental Law of GearingFor a pair of gear to transmit constant angularvelocity ratio, the tooth profiles of thesemating gears must be designed in such a waythat the common normal (line n-n) or the lineof action passes through a fixed point P, oralso known as the pitch point, on the line ofcenters.

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