Drill bit Tvardy long HSS for metal 4.5 x 235 mm DIN1869

Long HSS metal drill bit Tvardy, size 4.5 x 235 mm, manufactured to DIN1869. This high-speed steel twist drill is engineered for drilling through a variety of metals and metal alloys where a longer reach is required. Its extended flute length and ground point geometry provide consistent cutting performance and efficient chip evacuation during use in both handheld drills and drill presses.

Advantages

The HSS construction offers good wear resistance and heat tolerance for continuous drilling in metalwork. The long design allows access to recessed or deep holes without the need for extension tools. Precision grinding to DIN1869 ensures uniform geometry and reliable centring, reducing wandering at the start of drilling and improving hole quality.

Suitable for

• Drilling holes in steel, sheet metal, and non-hardened alloys
• Maintenance and repair tasks that require access to deep or recessed areas
• Workshop and construction jobs using handheld drills or drill presses

Key specifications

• Material: High-speed steel (HSS)
• Diameter: 4.5 mm
• Total length: 235 mm
• Type: Twist drill with long flute
• Standard: Manufactured to DIN1869 geometry
• Suitable for: Metal and metal alloys

How to use

Secure the workpiece and mark the drilling position. Use an appropriate centre punch if precise centring is required. Fit the drill bit into the chuck of a handheld drill or drill press and tighten securely. Start at low speed to establish the hole, then increase speed as appropriate for the material while applying steady, moderate feed pressure. Use cutting fluid for improved cooling and chip removal when drilling tougher alloys or during prolonged operation. Withdraw the bit occasionally to clear chips on deep holes.

Usage recommendations

For prolonged tool life, select drill speeds and feed rates suitable for the metal being drilled and use cutting lubricant for steel and alloys. Inspect the bit for wear or damage before use and replace if the tip or flutes are worn to maintain hole accuracy and safety.