This part of the Technical Report constitutes a code of practice dealing with inspection relevant to radial composite deviations, runout, tooth thickness and backlash of cylindrical involute gears; i.e., with measurements referred to double flank contact.<\/p>\n
In providing advice on gear checking methods and the analysis of measurement results, it supplements the standard ISO 1328-2. Most of the terms used are defined in ISO 1328-2.<\/p>\n
Annex A provides a method to select gear tooth thickness tolerances and minimum backlash of a gear mesh. Suggested values for minimum backlash are included.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 1<\/td>\n | BRITISH STANDARD <\/td>\n<\/tr>\n | ||||||
| 2<\/td>\n | Committees responsible for this British\ufffdStandard <\/td>\n<\/tr>\n | ||||||
| 3<\/td>\n | Contents <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 1 Scope 2 References 3 Symbols, corresponding terms and definitions 3.1 Lower case symbols <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 3.2 Upper case symbols 3.3 Greek symbols 3.4 Subscript symbols 3.5 Definitions <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Figure 1 – Span and tooth thickness allowances <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Figure 2 – Tooth thickness, transverse plane <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | Figure 3 – Relationship between circumferential <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 4 Measurement of radial composite deviations 4.1 Checking principle Figure 4 – Principle of measuring radial composite deviations Figure 5 – Radial composite deviation diagram <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 4.2 The utility of radial composite deviation data Figure 6 – Interpretation of radial composite deviation <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 5 Measurement of runout, determining eccentricity 5.1 Measuring principle 5.2 Anvil size for measuring runout Figure 7 – Principal of measuring runout <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 5.3 Measuring runout <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Figure 8 – Anvil size for measuring runout <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Figure 9 – Runout from coordinate measuring machine Figure 10 – Runout diagram of a gear with 16 teeth <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 5.4 Evaluation of measurement 5.5 Value of runout measurement 5.6 The relation between runout and pitch deviations <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Figure 11 – Runout and pitch deviations of an eccentric gear <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Figure 12 – Gear with zero runout, but with considerable pitch and cumulative pitch deviations <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Figure 13 – Gear with pitch and cumulative pitch deviations and zero runout Figure 14 – Actual gear with little runout and substantial cumulative pitch deviation <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Figure 15 – Runout measurement with a rider when all space widths are equal and pitch deviations are present 6 Measurement of tooth thickness, tooth span and dimension over balls or cylinders Figure 16 – Addendum and chordal tooth thickness <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 6.1 Tooth thickness measurement <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Figure 17 – Chordal tooth thickness measurement by gear tooth caliper 6.2 Span measurement Figure 18 – Span measurement of helical gears <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Figure 19 – Limits of span measurement in base tangent plane <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 6.3 Control of tooth thickness by determining the dimension over balls or cylinders <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Figure 20 <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | Table 1 – Standard pin diameters in mm <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 6.4 Tooth thickness measurement with radial composite measurement 6.5 Calculations for radial composite action test measurement. <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Figure 22 – Radial composite action test measurement of tooth thickness 7 Gear limits and fits 7.1 Introduction <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Figure 23 – Fit of gear teeth 7.2 Tooth thickness tolerances <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Annex A Backlash and tooth thickness tolerance A.1 Purpose A.2 Backlash A.3 Maximum tooth thickness Figure A.1 – Feeler gauge backlash measurement <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | A.4 Minimum backlash Table A.1 – Recommended values minimum backlash <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | A.5 Specifications for tooth thickness measurement A.6 Maximum backlash <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | Annex B Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Code of inspection practice – Inspection related to radial composite deviations, runout, tooth thickness and backlash<\/b><\/p>\n |