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0.42 mm HSS DIN 338 metal drill bit
4648
Diameter (mm): 0,42178 sizes of this drill
0,30,40,420,50,60,70,80,911,11,21,251,31,351,41,451,51,61,71,81,922,12,22,32,42,52,62,72,752,82,933,13,23,33,43,53,63,73,83,944,14,24,34,44,54,64,74,754,84,955,15,25,35,45,55,65,75,755,85,966,16,26,36,46,56,66,76,86,977,17,27,37,47,57,67,77,757,87,988,18,28,38,48,58,68,78,758,88,999,19,29,259,39,49,59,69,79,759,89,91010,110,210,310,410,510,610,710,7510,810,91111,111,211,2511,311,411,511,611,711,811,91212,112,212,312,412,512,612,712,7512,812,91313,213,313,413,513,613,713,91414,214,314,414,514,614,7514,81515,2515,515,751616,2516,316,516,751717,2517,517,751818,2518,518,751919,2519,520
€0.49 tax inc.
Net price: €0.40
Description
Technical data for the Ø0.42 metal drill bit
| Technical data | |
|---|---|
| Working diameter of drill d | Ø0.42 mm |
| Overall length l1 | 20 mm |
| Flute length l2 | 5 mm |
- Drill bit manufactured according to DIN-338
- Suitable for drilling materials up to 35 HRC
- 118° point angle suited to drilling steel and cast steel
- Made from the finest grade of high-speed steel (HSS)
- Produces a hole with an h8 tolerance
- Low hole surface roughness
Cutting data for the Ø0.42 mm HSS NWKa drill bit
| Material | Cutting speed Vc [m/min] | Feed per revolution f [mm] | Spindle speed n [rpm] | Total feed rate [mm/min] |
|---|---|---|---|---|
| PSteel | 14-25 | 0.05 | 10616 | 531 |
| KCast iron | 10-18 | 0.05 | 7583 | 379 |
May be useful
Cutting parameters calculator
Ø0.42 metal drill bit with a straight shank
0.42 mm metal drill bit HSS DIN 338 is designed for producing microholes in structural steels, cast iron, and nonferrous alloys; in configurations described as a Ø0.42 mm metal drill bit, it maintains a stable cutting path and shop-floor accuracy grade IT12 when held with high clamping rigidity.
The nominal diameter is 0.42 mm. The 118° point angle supports reliable hole starting, while the ground helical flutes ensure continuous, uniform chip evacuation with right-hand cutting. The core, made from homogeneous, high-purity high-speed steel, offers wear resistance and a stable, sharp cutting edge. The length conforms to DIN 338 (standard length), providing a favorable slenderness ratio; maintaining IT12 tolerance requires high spindle speeds, micrometer-scale feed, precise clamping, and cooling with emulsion or oil mist.
- Reliable starting and axial alignment — the 118° geometry reduces wandering and stabilizes entry into the material.
- Controlled surface roughness — polished channels reduce friction, improving hole wall and exit edge quality; in practice Ø0.42 mm metal drill bit helps maintain low surface roughness when drilling into solid material.
- Repeatability of IT12 tolerance grade — dimensional stability is maintained with rigid clamping and properly selected speeds and feed.
- Wear resistance — homogeneous high-speed steel supports long cutting edge life in one-off and small-batch production.
Compliance with DIN 338 facilitates mounting in standard holders, and the resulting holes meet IT12 according to PN-EN ISO 286; in practical applications, a Ø0.42 mm drill bit for steel maintains a predictable diameter, axial alignment, and stable microhole geometry.
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| 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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