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You are watching: How to sharpen end mills by hand

neurosoup.org Forum›Machinery›Milling Machines›Mill Tooling
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sharpening end mills by hand.
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Sophmore
Apparently I"m some kind of weirdo. A friend experienced me stop working, pull the finish mill the end of my machine, and take it over to my vise come sharpen it. I usage a fairly coarse knife sharpening stone, and also it doesn"t take an extremely long. Does nobody else perform this?I"m not a real machinist or anything, and also I imagine in a real shop the time wouldn"t be worth it, yet there"s no way to get a replacement end mill out below without at the very least a 2 day wait. I"m also pretty cheap. (The main comment from my friend).I don"t use the sharpened people for complete work or anything (they are most likely not square), yet for rough work-related it saves wear and also tear top top my great end mills. I just mark the sharpened ones with a sharpie, although it"s fairly obvious once I"ve gone to one. So, everyone else execute this?
I confess to doing this together well. Usually it is the bottom cutting edges of HSS roughing mills the I have to touch up. I use one of those 3M diamond records with the plastic handle. I choose the "yellow" handle which ns think is about 600 grit. About 3 traction on each edge gets them back to cutting relatively well. Take care to usage the same variety of strokes on each edge, and shot to host the original angle the the edge.


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I hold the original angle as close as possible. I think I can do it a bit in different way though. I commonly take a large flat rock and level off every one of the bottom edges (just to obtain rid of any type of obvious damage). Ns then reduced the angled relief edges. After ~ I acquire them all sharp, I operation that large flat rock over the bottom again, staying flat on every the cut edges. This levels the end any higher or lower cutting edges. Then I just touch up the angled cut again until the flats ns made with the flat rock go away. The isn"t perfect, however I"ve been using the very same 3/4" end mill because that a an extremely long time to level off stock. I generally don"t mess through the flute edges, yet I think I could probably touch those up as well if I had actually to. It just seems that the bottoms obtain dull quicker than the sides for me. I could have to get one the those diamond stones though. I go through those rough circuit knife sharpening stones quite quick.