Posted by ron jones on June 04, 2015 at 14:39:42:
Ignoring strange appearance of heavily corrected gears,due to low numbers of teeth (like ten and lower), how accurate should the pressure angle be on standard set-ups? Whilst it can be difficult to separate 14.5 and 20 degree Pressure angles, it is so much more difficult to check out 14.5 and 15 degree which occur on some 1930's European machine tools. for example.Does it matter? Vibration? Publications like "Gear Technology" strive for highly expensive and complicated perfection.Is there an amount of error (Cosine formula?) or percentage that would cause rejection to an international Gear Standard?