Posted by Neil Wyatt on 19/10/2016 15:31:01:
It does look a lot of extra effort for questionable returns.
It does remind me, however, of the finishing tool like a D-bit turned through ~70-80 degrees that supposedly can remove 'cobwebs' of metal.
Neil
Neil,
Ironically, I usually get a superb finish using that tool, even on cruddy "black bar". I know it as a "vertical shear tool" or a "shear tool" – well documented here http://www.gadgetbuilder.com/VerticalShearBit.html
It removes cuttings as fine as steel wool – quite amazing – it was my first ever succesful tool grind.
To date I have been completely unable to get a good finish with the standard round end HSS tool bit.
I usually get a good finish if I turn a knife tool around to almost rub – as mentioned by Sparey and Westbury in their books – I can also get a good finish if I turn a tangential tool around by 90 degrees to turn it into a shear tool, or put a big radius on the cutting corner, but a conventional round grind HSS bit – never worked for me.
……… and thanks very much to everyone for all the replies on the skiving.
This is called gear skiving and I think it is amazing ………… https://www.youtube.com/watch?v=XUDkQQJ8Uyw there are various other videos on youtube.
Bill