Drill bit Proline HSS-TiN 8.5 mm – 5154491

Proline HSS-TiN 8.5 mm drill bit (MPN 5154491) is designed for drilling metal with a durable titanium nitride (TiN) coating that increases surface hardness and wear resistance. The bit features a sharpened 135° tip with an adjustable rake angle for improved cutting and cleaner holes. Diameter is 8.5 mm, working length 75 mm and overall length 117 mm; compatible with standard drill chucks for hand and bench drills.

Advantages

The HSS substrate combined with TiN coating extends tool life and maintains cutting performance during repeated use. A 135° ground point with rake adjustment reduces walking and improves hole centring on metal surfaces, while the polished flutes aid chip evacuation and produce a smoother hole finish.

Suitable for

• Drilling steel and other metals
• General workshop and maintenance tasks
• Use in hand-held and bench drills with standard chucks
• Occasional drilling in wood and some plastics

Key specifications

• Brand: Proline
• Model / MPN: 5154491
• Diameter: 8.5 mm
• Working length: 75 mm
• Total length: 117 mm
• Material: HSS with TiN (titanium nitride) coating
• Tip angle: 135° (ground, rake-adjustable)
• EAN: 5903755154491

How to use

Secure the drill bit in a suitable chuck and clamp the workpiece as needed. Select an appropriate drilling speed for the metal being worked on, apply steady pressure, and allow the bit to cut without excessive force. Periodically withdraw the bit to clear chips and reduce heat build-up. Use cutting fluid when drilling harder metals to extend bit life and improve hole quality.

Usage recommendations

For best results when drilling hardened or stainless steels, use suitable cutting fluid, lower rotational speeds and steady feed. Replace the bit if the TiN coating shows significant wear or if cutting performance deteriorates.