12-21-2015, 12:38 PM
Hi Dave
I am agreeing with you it was late when I replied and I had had a few
, what you wrote agrees with what I have been saying , Tempering and Annealing are to different processes with different aims and are NOT interchangeable , odd that some with a lifetime in the trade would think they are .
I am just going from what's written in the engineering text books I have . Personally I don't think the blade undergoes any hardening during the short grind time .Maybe I will do some tests with the old Scleroscope ,brush the dust off it . Funny how Starrett feel there is no need for the second heat .
So is milling still milling or is it turning
All the best
Rob
I am agreeing with you it was late when I replied and I had had a few
, what you wrote agrees with what I have been saying , Tempering and Annealing are to different processes with different aims and are NOT interchangeable , odd that some with a lifetime in the trade would think they are . I am just going from what's written in the engineering text books I have . Personally I don't think the blade undergoes any hardening during the short grind time .Maybe I will do some tests with the old Scleroscope ,brush the dust off it . Funny how Starrett feel there is no need for the second heat .
So is milling still milling or is it turning
All the best
Rob