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| grinder:
Hi Guys, Here are a few pics of my latest project, an end mill grinding fixture. I have a bunch of old end mills that are in pretty sad shape. I would really like to put them into service again, so I thought I'd try to sharpen them myself. Years ago, I spent some time in a machine shop and saw a fixture that could be used on a mill to sharpen these things. I found out as much as I could about the cutting angles and such and came up with this. It kind of resembles a commercial fixture, but is smaller, since all my mills are about 2-3 inches in length. Anyway, see what you think. I need to find a better grinding wheel though....Any thoughts?? I tried using a small grinding wheel (actually, a heavy duty cutoff wheel) froma Dremel set, but these things are not very strong and break very easily. |
| Bogstandard:
It is not just a matter of grinding across the face, it has to come from the right direction, otherwise you will find that the cutter will either go dull very quickly or in fact chip along the cutting edge. Really, you require a much heavier wheel, and preferably in an upright position, so you are using the periperal of the wheel rather than the side face. Bogs |
| winklmj:
I've come across a couple of places showing the small diamond disks (Harbor Freight variety) being used. They back them up with an metal backing plate to eliminate the flex. |
| Trion:
Funny you should ask just now, as I was just searching for the same stuff, and found these threads showing a very simliar fixture to yours. It got even better when i saw that bogs had replied :thumbup: http://madmodder.net/index.php?topic=1428.0 http://madmodder.net/index.php?topic=1434.0 Here's also a guy who has built his own grinder, quite a bit of usefull info on end mill grinding http://www.gadgetbuilder.com/Brooks%20Grinder.html |
| Bernd:
:offtopic: Hey Bog's welcome back. :thumbup: Bernd |
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