Unless your cutter is badly worn/resharpened it shouldn't need more off, but if it does then gashing is the only thing you can easily do, using a thin cutting disc. IIRC Chaddock describes it in the Quorn book.

Hi John,

On the centre cutting endmills I use a thin cutting disc in my Dremel before grinding the cutting edge.

Thor

I'm doing the gashing free hand, and yes, my old eyes struggles with the small cutters so a jig is on my to do list.

Thor

I don't recall the Prof. describing gashing in the original ME series, but he did emphasise the delicacy of setting up to sharpen slot drills which had an over-centre cutting lip. In those days, all end mills seemed to come with central hollow, whereas now they all seem to be centre cutting.

Another point he made re end mills was to sharpen with the end teeth set in 1 deg. inwards towards the centre.

This is to allow for tooth wear being greatest on the outer diameter and avoid cutting on the heel of the tooth.