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HSSE 0.3 cobalt metal drill bit DIN 338
12145
Diameter (mm): 0,3115 sizes of this drill
0,30,40,50,60,70,80,911,11,21,31,41,51,61,71,81,922,12,22,32,42,52,62,72,82,933,13,23,33,43,53,63,73,83,944,14,24,34,44,54,64,74,84,955,15,25,35,45,55,65,75,85,966,16,26,36,46,56,66,76,86,977,17,27,37,47,57,67,77,87,988,18,28,38,48,58,68,78,999,19,29,39,49,59,69,79,89,91010,110,210,310,410,510,610,81111,211,311,511,81212,112,212,512,813
€0.91 tax inc.
Net price: €0.74
Description
Technical data for the Ø0.3 cobalt drill bit
| Technical data | |
|---|---|
| Working diameter of drill d | Ø0.3 mm |
| Overall length l1 | 19 mm |
| Overall length L | 3 mm |
- Drill bit manufactured according to DIN-338
- Suitable for drilling materials up to 37 HRC
- 130° point angle adapted for drilling INOX
- Made from the finest grade of HSS-E high-speed steel with 5% added cobalt
- Produces a hole with an h8 tolerance
- Low hole surface roughness
Cutting data for the Ø0.3 mm HSSE NWKa drill bit
| Material | Cutting speed Vc [m/min] | Feed per revolution f [mm] | Spindle speed n [rpm] | Total feed rate [mm/min] |
|---|---|---|---|---|
| PSteel | 20 | 0.05 | 21231 | 1062 |
| MStainless steel | 10 | 0.05 | 10616 | 531 |
| KCast iron | 15 | 0.05 | 15924 | 796 |
| NAluminum and nonferrous materials | 34 | 0.06 | 36093 | 2166 |
May be useful
Cutting parameters calculator
Ø0.3 Inox cobalt drill bit for metal
0.3 cobalt metal drill bit HSSE DIN 338 is designed for drilling microholes in low- and medium-carbon steels, stainless steels, and copper alloys while maintaining stable cutting geometry and predictable dimensional accuracy.
Nominal diameter 0.30 mm; manufactured to DIN 338 (standard series length). The 118° point angle balances axial forces during entry into the material. The straight shank with h8 tolerance enables concentric clamping in precision chucks. Liquid cooling and short peck drilling cycles with controlled retraction and low feed per revolution are recommended. Under typical workshop conditions, IT12 tolerance grade according to ISO 286 is achieved; the result depends on spindle runout, setup rigidity, and the type of steel being machined.
- Thermal stability of the cutting edges — the cobalt content in HSSE increases resistance to elevated temperatures, helping the cutting edges stay sharp longer.
- Microdimensional accuracy — proper setup and short feed strokes help maintain the dimension within IT12 limits throughout the full depth.
- Fine chip control — the flute geometry promotes efficient evacuation of very short chips and stabilizes the feed.
- Versatility across materials — cutting data can easily be adjusted for structural and stainless steels; it also works well as a Ø0.3 mm drill bit for steel.
Compliance with DIN 338 defines lengths, cutting section geometry, and shank fit; these requirements help ensure proper holder selection and calculation of cutting speed and feed. Ø0.3 cobalt metal drill bit HSSE DIN 338 combines the stability of cobalt steel with process repeatability, which remains essential in precision operations on steel and metal alloys.
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| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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