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Drill fi 0,42 mm for metal - HSS DIN 338 NWKa - nr. 1
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  • Drill fi 0,42 mm for metal - HSS DIN 338 NWKa - nr. 1
  • Drill fi 0,42 mm for metal - HSS DIN 338 NWKa - nr. 2

HSS DIN 338 0.42 mm metal drill bit

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4648
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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
wiertło do metalu - rysunek techniczny

  • 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
Wiertło do metalu - kąt ostrza 118 stopni

Cutting parameters of drill fi 0,42 mm HSS NWKa

ISO symbolMaterialCutting 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

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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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HSS DIN 338 0.42 mm metal drill bit

HSS DIN 338 0.42 mm metal drill bit

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