Micro drills PCB drills 5.5mm with hardness 1950 HV30 ground carbide rods
Dimension:
Outer Diameter: 5.5mm
Tolerance of OD -0.006
Length: 38.5mm
Tolerance of Length:+0.1/+0.4
Roughness: Ra0.1 polished
Suitable for manufacturing micro-drills 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 |
| D | Tolerance | L | Tol. |
| 3.25 | 0/+0.05 | 38.7 | ± 0.20 |
| 3.25 | 0/+0.05 | 38.5 | ± 0.20 |
| 3.50 | 0/+0.05 | 38.5 | ± 0.20 |
| 4.00 | 0/+0.05 | 38.5 | ± 0.20 |
| 4.50 | 0/+0.05 | 38.5 | ± 0.20 |
| 5.00 | 0/+0.05 | 38.5 | ± 0.20 |
| 5.50 | 0/+0.05 | 38.5 | ± 0.20 |
| 6.00 | 0/+0.05 | 38.5 | ± 0.20 |
| 6.50 | 0/+0.05 | 38.5 | ± 0.20 |
| 3.50 | +0.2/+0.5 | 12.8 | ± 0.10 |
| 4.00 | +0.2/+0.5 | 12.8 | ± 0.10 |
| 4.50 | +0.2/+0.5 | 12.8 | ± 0.10 |
| 5.00 | +0.2/+0.5 | 12.8 | ± 0.10 |
| 5.50 | +0.2/+0.5 | 12.8 | ± 0.10 |
| 6.00 | +0.2/+0.5 | 12.8 | ± 0.10 |
| 6.50 | +0.2/+0.5 | 12.8 | ± 0.10 |
| 6.85 | +0.2/+0.5 | 12.8 | ± 0.10 |
Description:
- 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 could be 0.05 or 0.02.
Carbide grades
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 |
What we can provide
