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.

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