WayinTop 50pcs PCB Drill Bits Set Spiral Flute Carbide 0.3mm-1.2mm for Print Circuit Board Stone Dremel Jewelry CNC Engraving (5PCS Each)

Excellent for scale models!! These micro drill bits will work in any adjustable chuck hand drill. As some of the bits are oh so easy to break, at this price point it’s worth having extras on hand.

My immediate reaction was the drill bits looked well made and the individual boxes will provide good protection for the drill bits. I wasn't thrilled that the bits are not marked with the size. It was not difficult to make labels to affix to each bit and I have already done so. Doing it took some time but at least I won't have to measure a bit every time I want to use them. I used a digital micrometer to measure each bit. As far as their performance goes they work great. They are very sharp and I have already used them on three types of wood and bamboo, as well as plastic. The bits cut through everything with ease. I even had to drill some holes on sloped surfaces and if you start slowly the bits will not deflect. I think because they are tungsten carbide they are quite stiff and that helps on angled surfaces. However, I am sure most users know that since they are stiff and being quite small diameters you will have best results if used with a drill press. Drilling by hand can be done but the risks of breaking bits is greater Overall I am very pleased and hopefully the bits will stay sharp over time.

Great value with substantial flute length given the diameter of each drill.

It goes without saying, that when utilizing drill bits this small, they're very easy to break if you're not really, really cautious. Having a small, jewelers style drill press is quite beneficial and will save you a lot of time and frustration. The fact you receive such a large quantity is a real blessing and I'm very pleased with these bits. Yes, I would recommend them.

I am not easily impressed and never thought I'd be excited over micro drill bits, but these are phenomenal. I just returned 2 sets of micro drill that were not as advertised where they just threw in a bunch of a couple sizes yet were sold as a complete set. These are truly a set. I needed to drill a lot of holes under .020 in some N Scale track. My old set was missing the smallest sizes so I needed new. I started with the 3rd smallest in this set (.0185 in) and chucked it in my old floor model drill press. I drilled through 1/8 plywood first before testing it on a section of track. Both came out great. I then moved down to the 2nd smallest (.0150 in) and drilled another section of track. No glitches, no broken bits, just perfect holes as needed. I feel confident I can now complete the task once the temp in my workshop gets above freezing.

VERY brittle. Any movement of the drilling device other than directly on to the work will snap the drill. Too bad because the base attachment makes handling these drill bits easy, and they will fit a Dremel tool or perhaps a hand drill nicely.

They look like nice bits they seem to work well, I have broken 2 of them but I think that is more due to my lack of knowledge in how to operate my cnc machine. I m trying to etch a circuit board for an automation system I built, but what I did was prove that I am not even smart enough to open a box of cnc bits without injuring myself. I tried to open one of the boxes and it was stuck kind of hard, so I forced it open and buried the .4 and .5 bits into my finger, all the way in. I wish I had the cognitive reasoning of a sane person that didn't have two long needles stuck in their fingers and had taken a picture, because it looked like uncle martins antenna from my favorite Martian sticking out of my finger. To make matters worse I kept hearing this high pitched squeal and immediately though ,oh no, I must have accidentally turned on the machine. So instead of pulling out those 2 tiny daggers that thankfully my distal phalange (top finger bone) had to forethought to stop for me, I started looking at the machine to make sure it was off. The noise as it was, happened to be my daughter (20) squealing like a nutter because I was standing there with bits of tools sticking out of my person at odd angles. Worst of all it was my middle finger, the hardest working finger in the universe. I've been married for 23 years, its how we say good morning, its how we pass each other in the hallway so we can at least say we had hallway sex, its how I let my kids my dog and my boss know that they are number one in my life. They were stuck in so good that they even came out of the box still in my finger. So they are sharp, and be careful opening the little boxes.

I show you in my video just hiw sharp and how sturdy these things are. They go directly through steel, Plastic of different densities, and even rock. Absolutely the best and sharpest Dremel tool out there. I don't even need the Dremel I just use it with my hand because they are SO SHARP I seriously do nit need the extra power. If you have a series of holes to make a dremel would be the way to go so it's not so time consuming but im telling you these are the best out there... my video shows it all. I show me making new holes in my cigarette filters that are ass and don't have enough or big enough holes to get more then one cigarette out of them. I also show a bottle cap to gove you and idea on the variety of density they drill into.I also show me putting a new hole in my steel cigarette filter. All by hand. Absolutely no problem and takes literally seconds. By hand. Just watch the video ☺️

径が細いので耐久性はそれなりですが、切れが悪いわけではないのでこれだけ安価ならば十分お得でしょう。

They do the job but as to be expected, the small (er) ones are super easy to break so yeah, the 5 pack is gonna come in REAL handy. It's not the tools fault it's the tool running the tool, I didn't have my drill bit square to the piece i was drilling a couple of times and they break easy. If you're using them square to you work piece and dont change the bits angle once you're in and allow the bit to pull itself through you will be amazing at what they can do

These arrived promptly. They appear to be good quality. Due to some feedback from similar listings for drill bits of this type I was keen to try them - especially the smaller bits. I mounted the smallest bit (0.3mm) into my micro-drill press and drilled multiple holes in 1mm ABS, 4mm soft timber and 1mm brass sheet. Whamo - all good. No breakages. I tried two speeds. 50% (approx. 2000rpm) and 100% (approx. 4000rpm) All good. As mentioned umpteen times before on these sorts of listings, you need to go EASY with these types of bits - or any small bits like these. Any excessive run-out on your drill press or excessive force WILL snap the bit. Drop the quill a tiny bit at a time, back off a tad and drop it again. Repeat till the bit pops through. Even in a pin-vice any slight twist or bending will likely snap anything under say 0.5mm. So go easy, give these bits the due attention they require and they will last you. Lastly, if you use small bits often - it's really a good idea to invest in a micro drill press (if you have a good look around you don't need to pay a lot of money for one 😉). 😎 Edited 22/06/2025 - corrected drill speeds.

プラモデルのでぃティーアップには必須

Excellent quality, I would not use the smallest drills in a hand twist drill though, too fine to trust, they will break. Only to be expected at that size. They are best used in a Dremel type drill that is powered. Not too fast a speed and care must be taken as with any drilling job with fine drill bits.