HSS-Co Drill Bit Ø4.2 mm

HSS-Co Ø4.2 mm Drill Bit (Code: GRA0042) is a professional metal drill bit manufactured from high-speed cobalt steel (HSS-Co). It offers excellent heat and wear resistance, making it ideal for drilling stainless steel, carbon steel, aluminium and other metals. The Ø4.2 mm drill bit is the recommended size for preparing holes before cutting M5 × 0.8 internal threads.

Technical Information

• Product code: GRA0042
• Drill diameter: Ø4.2 mm
• Material: HSS-Co (High-Speed Steel with Cobalt)
• Application: Metal drilling
• Suitable for steel, stainless steel, aluminium and other metals
• Recommended for M5 × 0.8 thread preparation

Key Features

• HSS-Co material provides excellent durability and long service life.
• Ideal for drilling stainless steel and other metals.
• Produces the correct Ø4.2 mm hole for M5 × 0.8 thread cutting.
• Suitable for professional workshop and industrial applications.
• Delivers accurate and clean drilling results.

Applications

This drill bit is designed for accurate metal drilling before tapping and for general metalworking applications. When cutting M5 × 0.8 threads, a Ø4.2 mm hole should be drilled first to ensure proper thread formation. For the best results, use cutting fluid and the appropriate drilling speed for the material being machined.

Recommended Together

This drill bit is the perfect match for the HSS-Co M5 × 0.8 Spiral Tap (Code: SRI0005) or the complete M5 × 0.8 Tap & Drill Set, which includes both tools for accurate and efficient thread cutting.

FAQ

What is a Ø4.2 mm drill bit used for?

A Ø4.2 mm drill bit is used for accurate metal drilling and is the recommended size for preparing holes before cutting M5 × 0.8 metric threads.

Is this drill bit suitable for stainless steel?

Yes. The HSS-Co drill bit is suitable for drilling stainless steel, steel, aluminium and other machinable metals.

What are the advantages of HSS-Co over standard HSS?

HSS-Co contains cobalt, providing higher heat resistance, improved wear resistance and a longer service life, making it ideal for demanding drilling applications.

Should cutting fluid be used?

Yes. Cutting fluid reduces friction, improves drilling performance and significantly extends the service life of the drill bit.