Tapper shank drills, extra long series, code VK70010, diameter 20,5 mm
| D | MK | l1 | l2 | Item code | On stock |
|---|---|---|---|---|---|
| 20,5 | 2 | 385 | 260 | VK70010.2050 | Yes |
Cutting conditions
Material |
Strength |
Vc |
fz(mm/r) Ø1 |
Ø2 |
Ø3,15 |
Ø4 |
Ø5 |
Ø6,3 |
Ø8 |
Ø10 |
Ø12,5 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| P.1 | Free-cutting steels, general construction steels | ≤ 600 N/mm² | 20 | 0,025 | 0,04 | 0,063 | 0,08 | 0,08 | 0,1 | 0,125 | 0,16 | 0,16 |
| P.2 | General construction steels, steel castings | ≤ 850 N/mm² | 16 | 0,025 | 0,04 | 0,063 | 0,08 | 0,08 | 0,1 | 0,125 | 0,16 | 0,16 |
| K.1 | Cast iron(≤ 240 HB) | ≤ 820 N/mm² | 20 | 0,025 | 0,04 | 0,063 | 0,08 | 0,08 | 0,1 | 0,125 | 0,16 | 0,16 |
| K.2 | Cast iron(> 240 HB) | > 800 N/mm² | 16 | 0,025 | 0,04 | 0,063 | 0,08 | 0,08 | 0,1 | 0,125 | 0,16 | 0,16 |
| N.4 | Cooper-zinc alloys, cooper-tin alloys | ≤ 850 N/mm² | 20 | 0,015 | 0,025 | 0,04 | 0,05 | 0,05 | 0,063 | 0,08 | 0,1 | 0,1 |
Product attributes
Designed for steels up to 800 N/mm²
Conical lip relief, split point, DIN 1412 form C.
Point angle 118°
Right helix
Lead of helix 25° - 30°.
Conical lip relief, split point, DIN 1412 form A
Drilling depth 20xD
High speed steel of average performance, it is applicable especially for cutters of smaller diameters and for milling of materials up to the strength of 900 MPa.