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Gear Technical Reference

Gear Technical Reference – The Role Gears are Playing

Gears are used in various types of machinery as a transmission component.
The reasons why gears are so widely used to this day can best be described by these facts :

This technical reference provides the fundamentals of both theoretical and practical information.
When you select KHK products for your applications, please make use of the KHK catalog and this technical reference.

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Table of Contents

  1. Gear Types and Terminology
  2. 1.1 Type of Gears
    1.2 Symbols and Terminology
  3. Gear Trains
  4. 2.1 Single – Stage Gear Train
    2.2 Two – Stage Gear Train
  5. Involute Gear Profile
  6. 3.1 Module Sizes and Standards
    3.2 The Involute Curve
    3.3 Meshing of Involute Gear
    3.4 The Generating of a Spur Gear
    3.5 Undercutting
    3.6 Profile Shifting
    3.7 Gear Tooth Modifications
  7. Calculation of Gear Dimensions
  8. 4.1 Spur Gears
    4.2 Internal Gears
    4.3 Helical Gears
    4.4 Bevel Gears
    4.5 Screw Gears
    4.6 Cylindrical Worm Gear Pair
  9. Tooth Thickness
  10. 5.1 Chordal Tooth Thickness Measurement
    5.2 Span Measurement of Teeth
    5.3 Measurement Over Rollers
  11. Gear Backlash
  12. 6.1 Definition of Backlash
    6.2 Backlash Relationship
    6.3 Tooth Thickness and Backlash
    6.4 Gear Train and Backlash
    6.5 Methods of Reducing Backlash
  13. Accuracy of Gears
  14. 7.1 Accuracy of Spur and Helical Gears
    7.2 Accuracy of Bevel Gears
  15. Mounting Accuracy of Gears
  16. 8.1 Accuracy of Center Distance
    8.2 Axial Parallelism
    8.3 Features of Tooth Contact
  17. Gear Materials
  18. 9.1 Types of Gear Materials
    9.2 Heat Treatments
  19. Gear Strength and Gear Durability
  20. 10.1 Bending Strength of Spur and Helical Gears
    10.2 Surface Durability of Spur and Helical Gears
    10.3 Bending Strength of Bevel Gears
    10.4 Surface Durability of Bevel Gears
    10.5 Surface Durability of Worm Gear
  21. Design of Plastic Gears
  22. 11.1 The Properties of Nylon and Duracon
    11.2 Strength of Plastic Gears
  23. Gear Forces
  24. 12.1 Forces in a Parallel Axes Gear Mesh
    12.2 Forces in an Intersecting Axes Gear Mesh
    12.3 Forces in a Nonparallel and Nonintersecting Axes Gear Mesh
  25. Lubrication of Gears
  26. 13.1 Methods of Lubrication
    13.2 Gear Lubricants
  27. Damage to Gears
  28. 14.1 Gear Wear and Tooth Surface Fatigue
    14.2 Gear Breakage
    14.3 Types of Damage and Breakage
  29. How to reduce Gear Noise
  30. Determining the Specifications of Gears
  31. 16.1 A Method for Determining the Specifications of a Spur Gear
    16.2 A Method for Determining the Specifications of a Helical Gear
  32. Gear Systems
  33. 17.1 Planetary Gear System
    17.2 Hypocycloid Mechanism
    17.3 Constrained Gear System

Special contents for website

Gear Design - A detailed description of Gear Design
Gear Pump - A detailed description of Gear Pump

Related links :
The ABC’s of Gears / Basic Guide – B
Introduction to Gears
Spur Gears - A detailed description of Spur Gears
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