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Description
Technical data of drill bit for metal Fi 0,42
| Technical data | |
|---|---|
| Working diameter of drill d | fi 0,42 mm |
| Overall length l1 | 20 mm |
| Length of working part l2 | 5 mm |
- Drill bit made according to DIN-338
- Possible drilling to a hardness of 35 HRC
- Blade angle of 118 degrees suitable for drilling in steel, cast steel
- Made of the best grade of high speed steel HSS ( High speed steel )
- Makes a hole in h8 tolerance
- Low roughness of the hole
Cutting parameters of drill fi 0,42 mm HSS NWKa
| ISO symbol | Material | Cutting speed Vc [m/min] | Feed per revolution f [mm] | Revolutions n [obr/min] | Total feed rate [mm/min] |
|---|---|---|---|---|---|
| P | Steel | 14-25 | 0,05 | 10616 | 531 |
| K | Cast iron | 10-18 | 0,05 | 7583 | 379 |
May be useful
Cutting parameters calculator
Drill fi 0.42 with cylindrical shank
The 0.42 mm HSS DIN 338metal drill bit is designed for making micro holes in structural steels, cast iron and non-ferrous alloys; in configurations defined by the formulation, the fi 0.42 mm metal drill bit maintains a stable cutting path and workshop accuracy class IT12 with high rigidity of clamping.
The nominal diameter is 0.42 mm. The 118-degree tip angle promotes secure drilling, and the spiral ground grooves ensure continuous and even chip evacuation in the right cutting direction. The core of high-purity homogeneous high-speed steel is characterized by wear resistance and sharp edge stability. Length execution according to DIN 338 (normal length) supports favorable system slenderness; high speeds, micrometer feed, precision clamping and emulsion or oil mist cooling are recommended to maintain IT12 tolerances.
- Reliable takeoff and alignment - 118-degree geometry reduces drift and stabilizes material entry.
- Controlled roughness - polished channels reduce friction, improving wall and exit edge quality; in practice, the fi 0.42 mm metal drill makes it easier to maintain low roughness for solid drilling.
- Repeatability of IT12 grade - stable dimension is maintained with rigid clamping and properly selected speeds and feeds.
- Wear resistance - homogeneous high-speed steel supports long blade life in unit and short-run work.
Compliance with DIN 338 facilitates installation in standard holders, and the holes produced qualify for IT12 according to EN ISO 286; in practical applications, the fi 0.42 mm drill bit for steel maintains predictable diameter, alignment and stable micro-hole 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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