Page 8 - Gear Technology Solutions

Table of Contents

Foreword.......................................................................................................................... III

Table of Contents............................................................................................................ V

P A R T 1 - G E N E R A L T O P I C S

1. Dimension Sheet Explanation Update……………….…………….................. 1
1.1 What Items have been added?….………………………………………..... 1
1.2 Tooth Thickness Convention for Bevel Gears…….................................. 1
1.3 Chore Diameter at the Pinion Heel........................................................... 2
1.4 Strength Factors……………...................................................................... 2
1.5 Back Driving Factor…………………….……………………………………. 3
1.6 Efficiency…………………………………………………………………..….. 5
1.7 Bearing Loads in Axial and Separating Direction………………………… 6
1.8 Tooth Thickness Calculation and Output………………………………….. 7
1.9 Precise Calculation of Normal Chordal Thickness…………………….... 15
1.10 Measurement of the actual Tooth Thickness Deviation………………….16
1.11 Summary.................................................................................................17
1.12 Literature................................................................................................ 18

2. Interchangeability of Gears……………….……………................................. 19
2.1 Exchange of one Member during Gearbox Service…………………….. 19
2.2 For which kind of Gears can one Member be exchanged?.................... 19
2.3 The Procedure of Correct Replacement Gear Assembly....................... 20
2.4 Mixing Straight Bevel Gears made with Two-Tool Generators and
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Coniflex Gears made with Circular Cutters...........................................22
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2.5 Strength of Coniflex Parts made with Circular Cutters………………… 22
2.6 Summary……………………………………………………………..………. 25
2.7 Literature……………………………………………………………………... 26

3. Understanding Ease-Off…………….…………….......................................... 27
3.1 Where is the Term “Ease-Off” Originated from?……………………….... 27
3.2 It begins with the Roll Simulation…........................................................ 27
3.3 The different Types of Crowning............................................................ 29
3.4 How the Contact Patterns are Calculated.............................................. 31
3.5 A different Way to Generate an Ease-Off Graphic………………………. 32
3.6 Summary………………………………………………………………..……. 33
3.7 Literature……………………………………………………………………... 34

4. Conjugate Bevel and Hypoid Gears……………….…………….................... 35
4.1 Why are Today’s Hypoids Perfect Crossed Axes Gear Pairs?……....... 35
4.2 News about Hypoid Gears?…................................................................ 36
4.3 The Three Fundamental Laws of Gearing.............................................. 36

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