gear hardness RA
gear hardness RA
(OP)
I am reviewing some prints for helical and spiral bevel gears that my company purchases. Under "Heat Treat" the prints state "Harden Teeth to 80-83 RA" The only Ra I am familiar with is Roughness Average. Does anyone know what RA is under heat treatment?
Thanks
Thanks





RE: gear hardness RA
For example 80-83RA is equivalent to ~58-63RC. I assume these are carburized or nitrided gears. Look at
http://www.bostoncenterless.com/hardness.htm
RE: gear hardness RA
RE: gear hardness RA
In your case the hardness readings will convert but the procedures will not.
It is always good practice if possible to use a method for the hardness as specified on the print and not convert.