Drill bit Tvardy long HSS for metal 6.5 x 275 mm DIN 1869

Long HSS metal drill bit by Tvardy with a 6.5 mm cutting diameter and 275 mm overall length, manufactured to DIN 1869 specification. This solid high-speed steel (HSS) bit is designed for through and deep drilling in a variety of metals. The extended flute and shank length allow drilling thicker workpieces or reaching recessed holes while maintaining drill stability when used with hand-held or bench drills.

Advantages

The HSS material provides wear resistance and higher heat tolerance compared with standard carbon-steel bits, enabling sustained cutting performance during prolonged metalworking operations. Manufactured to DIN 1869, the bit has consistent geometry and dimensional accuracy for improved centring and chip evacuation. Its 6.5 mm diameter offers a balance between clearance for drilling tasks and compatibility with common drill chucks.

Suitable for

• Through and deep drilling in steel, stainless steel, cast iron and non-ferrous metals
• Maintenance, repair and overhaul (MRO) tasks on machinery and metal structures
• Fabrication, metal workshop and construction applications requiring extended reach
• Use with hand-held drills and bench or pillar drills

Key specifications

• Cutting diameter: 6.5 mm
• Overall length: 275 mm
• Material: High-speed steel (HSS)
• Standard: DIN 1869
• Geometry: Long flute for deep-hole drilling and chip evacuation
• Shank type: Straight shank suitable for standard drill chucks

How to use

Secure the bit in the drill chuck ensuring it is properly seated and tightened. Select a suitable rotational speed and feed rate for the metal being cut—lower speeds for stainless and hard alloys, higher speeds for softer non-ferrous metals. Use cutting lubricant or coolant when drilling to reduce heat and extend tool life. Apply steady pressure and allow the drill to cut; withdraw periodically to clear chips when deep drilling.

Usage recommendations

For best results, match drill speed and lubrication to the workpiece material, clamp the workpiece securely, and use progressive pecking for deep holes to prevent chip packing and overheating. Inspect the bit for wear before use and replace when cutting performance degrades.