uxcell PCB Drill Bits 0.9mm Tungsten Carbide Rotary Tool Jewelry CNC Engraving Print Circuit Board Micro Drill Bits 1/8 Inch Shank 10 Pcs

Got these to cut the fret slots for a few mountain dulcimers I'm attempting to build. Was worried that they would be too fragile, so I took it easy. Cutting in Walnut. First one I used 24000rpm, .01DOC and 20IPM feed rate. No problems. Sped it up to .015DOC, 30IPM and still worked great. Only negative is that the cut isn't as smooth as I'd like, but a little sandpaper takes care of that. I will experiment with faster speeds and deeper cuts now that I know what works.

Cleaned out my mechanical pencil end great.

I use these bits to cut thin lines in cigar boxes to fit the neck during the build. They cut extremely well as long as you don't overheat the bit and cut the line slower than faster. I purchase this item regularly and would recommend them if you are cutting wood or plastic, drill small holes and don't mind the tendency to be a touch brittle to side forces. I recommend this bits and will purchase again

The delivery is fast. The two flutes make the drill weak, can't cut acrylic.

These bits will do the job that I bought them for. I will probably have to get some a bit larger but, for the circuit boards I have planned these will do the IC's qute well. I made some test holes and they worked fine even though I am using an old hand drill to drill the holes. I would recommend these to any circuit experimenter.

While the shield worked well, I was never able to get the touchscreen on the LCD display to work. Not a shield problem but a problem with the display/library. Fortunately in my application, I did not need the touchscreen feature.

Love the case these bits came in. I use them as pearl reamer. Its the perfect thickness for what I need. The bits are great quality. I ordered this set since the last drill bit I had fell and broke. Been using one of these for over a month now and it has not broken yet. Having the extra is a security for me since I use them all the time. Definitely reccomend.

Inexpensive bits 0.8mm which although useable are very fragile. They appear to be more useful for light engraving like printed circuit board etching than any kind of "milling".Feed speeds need to be kept below 200mm/ min.On PCBs, 0.6 mm are only useful for drilling

These seem very good quality. I did break 3, but I'm using them in a regular drill, to drill safety wire holes in hardened fasteners on my race bike. I had 2 pipe plugs in particular that even a colbalt drill bit wouldn't touch and these went right threw like it was nothing. When they broke threw is when they broke as they are tiny bits, and I tweeked the drill, but were easy to remove, and were my fault since, again, I'm using a hand drill with a tiny fragile bit. The 1.6mm bits are also perfect size for safety wire.

Colis reçu aujourd'hui le 26/01/2021. un gros merci...