Typical Uses
- Jewellery making
- Watchmaking and horology
- PCB and electronics work
- Model engineering
- Scientific laboratory and archaeology applications
Tips for Use
For the most stable results, use in a pillar drill or rotary tool with a high RPM. Avoid lateral pressure, especially with sizes under 0.5mm. Many horologists recommend locating the centre with a carbide graver, then holding a micro drill in a pin-vice and then taking them to the work.
No lubrication is needed, but a small drop of oil can help with tougher materials. Always remove the rubber sleeve with care to avoid snapping micro sizes.
Needle-Sharp Precision in Every Size
Unlike high-speed steel (HSS) alternatives, these solid carbide bits maintain their sharpness and strength even when used on tough materials like fibreglass, stainless steel, and copper-clad board.
Looking for speed, feed rate, and chip load data? Scroll down to view our technical table with recommended spindle speeds and cut depths by size.
TIP: Broken Carbide twist drills can be used to make carbide gravers and carbide scribers
Most horologists find the easiest way to use these micro drill bits 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. Make sure everything is running true without any lateral movement.
A solid carbide twist drill is perfect for delicate drilling through hard materials for model engineering, archaeology and scientific laboratory work.
Ideal for drilling through PCB, and 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.
Look at the different drill bit sizes of carbide micro drills to determine their effective cutting length, spindle speed, feed rate and chip load.
| Size (mm) |
|
|
Effective cutting length (mm)
|
Spindle speed (rpm)
|
Feed rate (m/mm)
|
Chip load (mm/rev)
|
0.1
|
|
|
1.5
|
125,000
|
0.8
|
0.006
|
0.2
|
|
|
3.5
|
125,000
|
1.5
|
0.012
|
0.3
|
|
|
5.5
|
125,000
|
2.3
|
0.018
|
0.4
|
|
|
7.0
|
125,000
|
2.9
|
0.024
|
0.5
|
|
|
8.5
|
95,500
|
2.9
|
0.03
|
0.6
|
|
|
9.5
|
79,600
|
2.9
|
0.036
|
0.7
|
|
|
9.5
|
68,200
|
2.9
|
0.042
|
0.8
|
|
|
9.5
|
59.700
|
2.9
|
0.048
|
0.9
|
|
|
9.5
|
53,100
|
2.9
|
0.054
|
1.0
|
|
|
10.5
|
47,800
|
2.9
|
0.06
|
1.1
|
|
|
10.5
|
43,400
|
2.9
|
0.066
|
1.2
|
|
|
10.5
|
39,800
|
2.9
|
0.072
|
1.3
|
|
|
12.0
|
36,700
|
2.9
|
0.078
|
1.4
|
|
|
12.0
|
24,100
|
2.9
|
0.084
|
1.5
|
|
|
12.0
|
31,800
|
2.9
|
0.090
|
1.6
|
|
|
12.0
|
29,900
|
2.9
|
0.096
|
1.7
|
|
|
12.0
|
28,100
|
2.8
|
0.10
|
1.8
|
|
|
12.0
|
26,500
|
2.7
|
0.10
|
1.9
|
|
|
12.0
|
25,100
|
2.5
|
0.10
|
2.0
|
|
|
12.0
|
23,900
|
2.4
|
0.10
|
2.1
|
|
|
12.0
|
22,700
|
2.3
|
0.10
|
2.2
|
|
|
12.0
|
21,700
|
2.2
|
0.10
|
2.3
|
|
|
12.0
|
20,800
|
2.1
|
0.10
|
2.4
|
|
|
12.0
|
20,000
|
2.0
|
0.10
|
2.5
|
|
|
12.0
|
20,000
|
2.0
|
0.10
|
2.6
|
|
|
12.0
|
20,000
|
2.0
|
0.10
|
2.7
|
|
|
12.0
|
20,000
|
2.0
|
0.10
|
2.8
|
|
|
12.0
|
20,000
|
2.0
|
0.10
|
2.9
|
|
|
12.0
|
20,000
|
2.0
|
0.10
|
3.0
|
|
|
12.0
|
20,000
|
2.0
|
0.10
|
Customer Reviews
“They drilled right into the arbor. Didn’t have to soften it a bit.”
“Excellent quality. Used one of the smallest drills and it performed as it should. Very pleased.”
“Performs very well drilling hard steel.”
“The best carbide drills I have ever used.”
“Great quality and precision.”
