Design calculations of the other aspects of the worm gear will be discussed in a subsequent part of the tutorial. We will use the AGMA formulae for doing the calculations. This worm gear design tutorial will discuss up to the selection of the module and pitch and the calculation of the number of teeth, pitch circle diameter and centre to centre distance between the worm and gear. CHAPTER 11 Worm Gears Chapter Outline 11.1 Introduction 439 11.2 Force Analysis 446 11.3 AGMA Equations 449 11.4 Design Procedure 453 11.5 Conclusions 455 References 456 Further Reading 456 Nomenclature 457 Abstract Worm and wheel gears are widely used for nonparallel, nonintersecting, right angle gear drive system applications where a high transmission gearing ratio is required.Ĭ – Centre to Centre Distance between the Worm and the Gear In the next worm gear box design calculation tutorial we will discuss the force analysis of a worm gear. A few worm gear design calculator are available on web, and some of them are free as well. The worm gear box design calculation explained here uses the AGMA empirical formulas.
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