January 2026
Intermediate
900 pages
23h 23m
English
Content preview from Machine Design, 2nd Edition by Pearson
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CHAPTER 28
Worm and Worm Wheel Set
Chapter Objectives
- Provide the specifications of any worm wheel set.
- Determine the lead angle of worm.
- Calculate the centre distance between worm and gear shafts axes.
- Calculate the preferred values of parameters Z1/Z2/q/m.
- Calculate the normal pressure angle and axial pressure angle.
- Specify the dimensions of worm and gear after knowing the parameters.
- Determine the three components of forces on worm and gear.
- Determine the relationship between tangential, radial and axial components of forces on worm and wheel.
- Determine the efficiency of drive.
- Determine the module of gear-wheel tooth from beam strength and wear strength.
28-1 INTRODUCTION
Worm and worm wheel drive is used for non-parallel, non-intersecting ...
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