I have previously discussed the problem of 1/8" end mills not having a flat spot to lock them in end mill holders. I focused on how vibration made them work loose, causing the end mill to fall out after last cutting pass. Today's discovery is that if trying to cut vertically at too high a speed can cause it to retract back into the holder. This means the 0.4" deep cut turns into about 0.2" actual depth.
Tuesday, November 18, 2025
Slippery End Mills
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sandblast them or sandpaper the end mill shanks, Alternatively, spin them in a lather and run coarse (green) 3m potscubbers ver them to give some texture.
ReplyDeleteIt helps, but at the end of it, you may have too big of jaws for the tooling.
Last time, I used a grinding wheel to put a notch in the shank. This is a new endmill. I will probably use the mill to add a flat to the shank.
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