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Model Forum / General / Models / November 2009Bevel Gears + Hunting Tooth
I understand it's bad practice to have the ratios between pinions set such as the same teeth always mesh - is this true for bevel gears? I'm going to cut a couple of bevel gears using the parallel depth method and a pair with 15 teeth, 40DP each would be best, but 15 teeth and 18 teeth I can live with if the "hunting tooth"(?) is likely to be a material issue. The shaft will probably be turning at around 500 - 1000rpm. TIA Steve > I understand it's bad practice to have the ratios between pinions set > such as the same teeth always mesh - is this true for bevel gears? I'm [quoted text clipped - 6 lines] > > Steve Depends on the application. If you were designing a differential for a production car then yes it is important but for a one off?? Only you can tell. Ask yourself how much work it will do, will a bit of noise when it wears be an issue and how much grief will you have in N years if you have to replace the gears? Getting a good tooth geometry would be more important to my way of thinking. Bob >> I understand it's bad practice to have the ratios between pinions set >> such as the same teeth always mesh - is this true for bevel gears? I'm [quoted text clipped - 16 lines] > > Bob Thanks Bob. Sounds like I can cut them 1:1 which will mean only one setup and a better fit between the pair. This won't run long enough to get worn! You can tell I'm learning - I've started looking for the difference between the "correct" method and the best method for the job at hand! Steve > >> I understand it's bad practice to have the ratios between pinions set > >> such as the same teeth always mesh - is this true for bevel gears? I'm [quoted text clipped - 26 lines] > > - Show quoted text - I would be more concerned about making 'straight' teeth ie spurs with angled reeth, tou should be making helicals, if you have a problem, I can help. Peter |
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