K20-K40 One central hole carbide rods with straight coolant holes
Outer diameter 8mm +0.2/+0.6
Inner diameter: 1.5mm ±0.15
Length: 330mm +5mm
Surface roughness: Raw sintered
Application: For making endmills or drills
| Classification | K20-K40 |
| Co % | 10 |
| WC incl. doping | 90 |
| Density g/ cm3 | 14.5 |
| Hardness HV30 | 1580 |
| Fracture toughness | 11 |
| Transverse rupture strength | 4100 |
| Average grain size | 0.7 |
Regular size for one central hole carbide rods:
| Outer Diameter mm | Inner Diameter mm | Length mm |
| OD | Tol. | ID | Tol. | Length | Tol. |
| 2.50 | +0.2/+0.5 | 0.3 | ±0.1 | 330 | 0/+5.0 |
| 4.00 | +0.2/+0.6 | 1.0 | ±0.15 | 330 | 0/+5.0 |
| 5.00 | 1.0 | ±0.15 | 330 | 0/+5.0 |
| 5.00 | 1.5 | ±0.15 | 330 | 0/+5.0 |
| 6.00 | 1.0 | ±0.15 | 330 | 0/+5.0 |
| 6.00 | 1.5 | ±0.15 | 330 | 0/+5.0 |
| 8.00 | 1.0 | ±0.15 | 330 | 0/+5.0 |
| 8.00 | 1.5 | ±0.15 | 330 | 0/+5.0 |
| 9.00 | +0.3/+0.7 | 1.0 | ±0.15 | 330 | 0/+5.0 |
| 10.00 | 1.0 | ±0.15 | 330 | 0/+5.0 |
| 10.00 | 2.0 | ±0.2 | 330 | 0/+5.0 |
| 11.00 | 1.0 | ±0.15 | 330 | 0/+5.0 |
| 12.00 | 1.0 | ±0.15 | 330 | 0/+5.0 |
| 12.00 | 2.0 | ±0.2 | 330 | 0/+5.0 |
| 14.00 | 2.0 | ±0.2 | 330 | 0/+5.0 |
| 16.00 | +0.4/+0.8 | 2.0 | ±0.2 | 330 | 0/+5.0 |
| 16.00 | 3.0 | ±0.25 | 330 | 0/+5.0 |
| 18.00 | 3.0 | ±0.25 | 330 | 0/+5.0 |
| 20.00 | 3.0 | ±0.25 | 330 | 0/+5.0 |
| 22.00 | 3 | ±0.25 | 330 | 0/+5.0 |
| 24.00 | 4 | ±0.30 | 330 | 0/+5.0 |
| 25.00 | 5 | ±0.35 | 330 | 0/+5.0 |
Regular size for two straight coolant holes carbide rods:
| Outer Diameter mm | TK mm | Inner Diameter mm | Deviation of holes
position≤(mm) a | Length mm |
| OD | Tol. | TK | Tol. | ID | Tol. | Length | Tol. |
| 4.30 | +0/+0.3 | 1.8 | -0.4/0 | 0.800 | ±0.1 | 0.15 | 330 | 0/+5.0 |
| 5.30 | 2.0 | -0.4/0 | 0.800 | ±0.1 | 0.20 | 330 | 0/+5.0 |
| 6.30 | 3.0 | -0.5/0 | 1.000 | ±0.15 | 0.20 | 330 | 0/+5.0 |
| 7.30 | 3.5 | -0.5/0 | 1.000 | ±0.15 | 0.20 | 330 | 0/+5.0 |
| 8.30 | 4.0 | -0.6/0 | 1.000 | ±0.15 | 0.20 | 330 | 0/+5.0 |
| 9.30 | 4.0 | -0.6/0 | 1.400 | ±0.15 | 0.20 | 330 | 0/+5.0 |
| 10.30 | 5.0 | -0.6/0 | 1.400 | ±0.15 | 0.20 | 330 | 0/+5.0 |
| 11.30 | +0/+0.4 | 5.0 | -0.6/0 | 1.400 | ±0.15 | 0.28 | 330 | 0/+5.0 |
| 12.30 | 6.0 | -0.6/0 | 1.750 | ±0.15 | 0.30 | 330 | 0/+5.0 |
| 13.30 | 6.0 | -0.6/0 | 1.750 | ±0.15 | 0.34 | 330 | 0/+5.0 |
| 14.30 | 7.0 | -0.6/0 | 1.750 | ±0.15 | 0.37 | 330 | 0/+5.0 |
| 15.30 | 8.0 | -0.6/0 | 2.000 | ±0.2 | 0.37 | 330 | 0/+5.0 |
| 16.30 | 8.0 | -0.6/0 | 2.000 | ±0.2 | 0.40 | 330 | 0/+5.0 |
| 17.30 | +0/+0.6 | 9.0 | -0.6/0 | 2.000 | ±0.2 | 0.47 | 330 | 0/+5.0 |
| 18.30 | 9.0 | -0.6/0 | 2.000 | ±0.2 | 0.50 | 330 | 0/+5.0 |
| 19.30 | 9.0 | -0.6/0 | 2.000 | ±0.2 | 0.50 | 330 | 0/+5.0 |
| 20.30 | 10.0 | -0.8/0 | 2.500 | ±0.25 | 0.50 | 330 | 0/+5.0 |
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 |
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
