uxcell 10Pcs 0.5mm Carbide End Mill Engraving Milling Cutter CNC Router Bits for PCB Machine, 1/8" Shank

These have performed great so far. I did break the first 3 before getting any machining completed. Actually ran in aluminum with good success. Need to keep in mind they are only .6mm (.023”) in diameter so high RPM.

I used these on dual layer abs for sign making. Work great and you don’t have to be careful with them because they are super cheap. Haven’t broken one yet

These bits are best bang for your buck. Affordable enough so you don't worry if one breaks. I use these for intricate inlay work as well as fret slots for guitar fretboard. The best way to use them is to cut a little bit off of the bit so it's stronger. I use just regular pliers and then grind/file down the end. This way your bit lasts longer.

Engraving for 1/8" chuck.Wish I could find a face mill with that shank size

liked

I tried using some these in a benchtop mill to engrave numbers in soft aluminum. 3 of them broke in 5 digits only removing about .003" of material and as slow as I could turn the handle on the table. If they don't work for this I'm not sure what else they would be useful for. Don't waste your money.

I use them all the time for projects in 6061 aluminum with no issues. If you read the other reviews i can tell you they have no clue on what they are doing. If you know feeds & speeds for your material these will last a good amount of time. If you plan on using these small end mills use flood coolant of mist with allot of chip clearing.

We bought these as replacement bits for our CNC machine. They were the exact same size as the original ones we had. Because they are such a fine bit they do break very easy. It was nice you got so many for the price to have backups if they do break.