For me the term "burr-free sharpening" is a little bit misleading especially in discussion how it differs from "burr based sharpening". In my thinking more suitable term would be "burr minimization sharpening approach".
In my understanding the burr is formed as a result of plastic flow after each cutting operation, regardless if edge-leading or edge-trailing technique was used.
In machining the burr formed during edge-leading cutting direction is called entrance burr while the burr formed during edge-trailing is called exit burr. Exit burr height is usually greater than the entrance burr.
Jan
In my understanding the burr is formed as a result of plastic flow after each cutting operation, regardless if edge-leading or edge-trailing technique was used.
In machining the burr formed during edge-leading cutting direction is called entrance burr while the burr formed during edge-trailing is called exit burr. Exit burr height is usually greater than the entrance burr.
Jan