Small PCB drills cemented carbide milling blanks with 8% Cobalt as the binder
Outer diameter: 3mm
Length: 40mm or as per required
Roughness: Ra 0.2 or Ra 0.05
Chamfer one side: 0.5*45°
| Grade | Density | T.R.S | Hardness | Properties & Applications |
| g/cm3 | N/mm2 | HV30 |
| YU08 | 14.56 | 4000 | 1900 | Suitable for manufacturing micro-drills with a diameter less than 0.8mm for machining PCB. It is also suitable for manufacturing various kinds of solid cemented carbide tools for machining glass fiber, wood, plastics, paper and brass, Al alloy etc. |
Regular size for small drills:
| Diameter mm | Length mm | | Diameter mm | Length mm |
| D | Tolerance | L | Tolerance | | D | Tolerance | L | Tolerance |
| 1.60 | +0/-0.006 | 20 | 0/+0.5 | | 10.00 | +0/-0.009 | 50 | 0/+0.5 |
| 2.35 | 30 | 0/+0.5 | | 10.00 | 70 | 0/+0.5 |
| 2.35 | 45 | 0/+0.5 | | 10.00 | 72 | 0/+0.5 |
| 3.00 | 60 | 0/+0.5 | | 10.00 | 75 | 0/+0.5 |
| 4.00 | +0/-0.008 | 40 | 0/+0.5 | | 10.00 | 80 | 0/+0.5 |
| 4.00 | 46 | 0/+0.5 | | 10.00 | 90 | 0/+0.5 |
| 4.00 | 50 | 0/+0.5 | | 10.00 | 100 | 0/+0.5 |
| 4.00 | 60 | 0/+0.5 | | 12.00 | +0/-0.011 | 70 | 0/+0.5 |
| 4.00 | 75 | 0/+0.5 | | 12.00 | 79 | 0/+0.5 |
| 4.00 | 100 | 0/+0.5 | | 12.00 | 83 | 0/+0.5 |
| 5.00 | 50 | 0/+0.5 | | 12.00 | 100 | 0/+0.5 |
| 5.00 | 60 | 0/+0.5 | | 12.00 | 120 | 0/+0.5 |
| 5.00 | 100 | 0/+0.5 | | 13.00 | 100 | 0/+0.5 |
| 6.00 | 40 | 0/+0.5 | | 14.00 | 75 | 0/+0.5 |
| 6.00 | 50 | 0/+0.5 | | 14.00 | 80 | 0/+0.5 |
| 6.00 | 58 | 0/+0.5 | | 14.00 | 83 | 0/+0.5 |
| 6.00 | 60 | 0/+0.5 | | 14.00 | 100 | 0/+0.5 |
| 6.00 | 67 | 0/+0.5 | | 16.00 | 80 | 0/+0.5 |
| 6.00 | 75 | 0/+0.5 | | 16.00 | 90 | 0/+0.5 |
| 6 | 100 | 0/+0.5 | | 20.00 | +0/-0.013 | 100 | 0/+0.5 |
| 8 | +0/-0.009 | 50 | 0/+0.5 | | | | | |
| 8 | 60 | 0/+0.5 | | | | | |
| 8 | 63 | 0/+0.5 | | | | | |
| 8 | 75 | 0/+0.5 | | | | | |
| 8 | 90 | 0/+0.5 | | | | | |
| 8 | 100 | 0/+0.5 | | | | | |
General Tolerance for ground carbide rods
| General tolerance for the h6 finished ground solid carbide rods |
| Diameter | Tolerance μm | | Length | Tolerance | | Straightness | Tolerance | | Circularity | Tolerances |
| ＜3.0 | -6/0 | ＜100.0 | +0.5/+1.0 | ＜4.0 | 0.07 | <3,0 | 2,0 micron |
| 3.0-6.0 | -8/0 | 100.0-165.0 | +1.0/+2.5 | 4.5-5.0 | 0.06 | 3,0- 6,0 | 2,5 micron |
| 6.0-1.0 | -9/0 | 165.0-335.0 | +1.0/+6.0 | 5.5-12 | 0.05 | 6,1-10,0 | 3,0 micron |
| 10.0-18.0 | -11/0 | | ＞12.5 | 0.04 | 10,1-18,0 | 3,5 micron |
| 18.0-30.0 | -13/0 | | 18,1- 30,0 | 4,0 micron |
| 30.0-50.0 | -16/0 | 30,1- 50,0 | 5,0 micron |
| General tolerance for the h5 finished ground solid carbide rods |
| Diameter | Tolerance μm | | Length | Tolerance | | Straightness | Tolerance | | Circularity | Tolerances |
| ＜3.0 | -4/0 | ＜100.0 | +0.5/+1.0 | ＜4.0 | 0.07 | <3,0 | 2,0 micron |
| 3.0-6.0 | -5/0 | 100.0-165.0 | +1.0/+2.5 | 4.5-5.0 | 0.06 | 3,0- 6,0 | 2,5 micron |
| 6.0-1.0 | -6/0 | 165.0-335.0 | +1.0/+6.0 | 5.5-12 | 0.05 | 6,1-10,0 | 3,0 micron |
| 10.0-18.0 | -8/0 | | ＞12.5 | 0.04 | 10,1-18,0 | 3,5 micron |
| 18.0-30.0 | -9/0 | | 18,1- 30,0 | 4,0 micron |
| 30.0-50.0 | -11/0 | 30,1- 50,0 | 5,0 micron
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Our tungsten carbide rods:
- 100% virgin material, no recycled material
- Spray drying tower and HIP sintering furnace
- Constant excellent quality
- Large stock for all sizes, the regular products can be shipped in 3 days, and the special rods can be ground in one week.
- 100% inspected before delivery. The inspection including raw material and dimension report will be sent you before delivery
- Excellent grinding quality, Straightless and circularity could be 0.05 or 0.02.
Carbide grades
What we can provide
