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Carbide Micro Drill Bits


Sizes available: 0.1mm - 3.175mm (1/8")

These very hard solid tungsten carbide micro twist drill bits are a cheaper alternative to our superior carbide spade drills. Excellent for drilling through all hard metals. Ensure a steady hand when using these drills, ideally used at high speed in a pillar drill.

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TIP: Broken Carbide twist drills can be used to make carbide gravers and carbide scribers

Most horologists find the easiest way to use them is by first finding the centre with a graver and then holding a micro drill in a pin-vice and then taking them to the work. Use very light pressure whilst taking the drill in and out periodically. No lubrication is necessary although a small dab of oil can help. Extra care is needed with handling these drills as they are very delicate, especially sizes from 0.1mm - 0.4mm.

These drills are also perfect for delicate drilling through hard materials for model engineering, archeology and scientific laboratory work.

Ideal for drilling through PCB, printed circuit boards. Made of fibreglass, printed circuit boards require a tough micro drill and our tungsten carbide drills range will outperform similar HSS drill bits.

Do not exceed 50,000 RPM's


High quality Tungsten Carbide throughout

  • Shank Diameter: 3.175mm = 1/8"
  • Split Point: 135 degree
  • Overall length: 38mm

Effective Cutting Length Varies as follows:

  • 0.1mm = 1.5mm
  • 0.2mm = 3.5mm
  • 0.3mm = 5.5mm
  • 0.4mm = 7mm
  • 0.5mm = 8.5mm
  • 0.6 - 0.9mm = 9.5mm
  • 1.00 - 1.20mm = 10.5mm
  • 1.30 - 1/8" = 12mm

Customer Reviews

Great quality drill bits, will use again.
Excellent quality of Carbide drills .
The product I purchased was a tiny carbide drill for making burner jets. The job was completed with no problems and the tool survived to operation despite being a very small diameter (0.3 mm)
Exactly what I need for my hobby
Excellent for those difficult watchmaking jobs
Excellent service, drills were just as described. Would highly recommend this supplier
Not real easy to find these. They had them and they were reasonably priced.
very good although one did have a slight imperfection that caused it to snap, not your fault though shit happens
They need to be much shorter at the smaller diameters. Two of them broke as the bit went through and wedged in the hole. Anybody using a 0.2mm drill doesn't need a 5mm deep hole.
Really well made drill bits. Beware though, the smaller sizes are very fragile
Chewed through a broken HSS twist drill very effectively,
Very well deigned bits with a substantial shank.
Excellant advice...very courteous...the lady whom I spoke to guided me to a product which was cheaper than the one I enquired about, but does the job well. I will use this supplier again.
The drill bit drilled out what I needed to, (broken exhaust stud) however the bit snapped under almost no pressure, both bits that I bought, I've carbide bits before and they weren't anywhere near as fragile, very disappointed and a waste of my £15 that I probably wont see again!
Fantastic quality bit, managed to drill straight through some extremely hard steel like butter (well almost)

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