This is a great achievement. I'd be really interested to see how a pair that were machined with your second cutter(improved geometry) would run together. I think likely 2 gears cut with the non burring cutter wouldn't runout so much.
I fell in love with Herringbone gears back in 2013 when I switched my Prusa I3 Rework over from a spur gear. 3d printing them is easy but milling them? Not really but I would have loved to have had a set (14:1 if I remember right or it was 12:1) in metal.
Just a point about the type of acetal you are using here. You mention 'Delrin' which is acetal homopolymer. You will find acetal copolymer a much nicer material to machine components from as it cuts far more cleanly with much less fluffy burring issues.
This is a great achievement. I'd be really interested to see how a pair that were machined with your second cutter(improved geometry) would run together. I think likely 2 gears cut with the non burring cutter wouldn't runout so much.
I fell in love with Herringbone gears back in 2013 when I switched my Prusa I3 Rework over from a spur gear. 3d printing them is easy but milling them? Not really but I would have loved to have had a set (14:1 if I remember right or it was 12:1) in metal.
Just a point about the type of acetal you are using here. You mention 'Delrin' which is acetal homopolymer. You will find acetal copolymer a much nicer material to machine components from as it cuts far more cleanly with much less fluffy burring issues.
this acetal was labeled Mitsubishi chemical 8941