Drill bit GRAPHITE HSS cylindrical for metal 5.5 mm (55H024)

GRAPHITE cylindrical HSS drill bit, 5.5 mm diameter, designed for drilling metal. Made of high-speed steel (HSS) to provide good wear resistance and heat tolerance during cutting, this drill bit is suitable for creating through-holes and pilot holes in steel, iron, aluminum and other metallic materials. It is compatible with hand drills and drill presses, offering straightforward use for common metalworking, maintenance and assembly tasks.

Advantages

The HSS material ensures better durability and resistance to softening at elevated temperatures compared with ordinary carbon steel bits. The cylindrical shank allows secure clamping in standard chucks and quick changes between handheld and bench-mounted drilling equipment. The 5.5 mm diameter provides a precise hole size for bolts, rivets and alignment operations, while the ground flute geometry supports efficient chip evacuation and steady cutting performance.

Suitable for

• Drilling through and pilot holes in steel and iron
• Drilling aluminium and non-ferrous metal sheets
• General maintenance, repair and assembly work
• Use with hand drills and drill presses

Key specifications

• Material: high-speed steel (HSS)
• Shank type: cylindrical
• Diameter: 5.5 mm
• Intended use: drilling in metal
• Suitable for: through-holes and pilot holes

How to use

Secure the drill bit in the chuck so the cylindrical shank is fully gripped and runout is minimised. Select an appropriate cutting speed for the workpiece material (lower speeds for stainless steels, higher speeds for aluminium), and apply consistent feed pressure to avoid bit wandering. Use cutting fluid or lubricant when drilling harder steels to reduce heat and improve tool life. After drilling, deburr the hole as required and inspect for correct diameter and finish.

Usage recommendations

For best results, match drill speed and feed to the metal type and thickness, use coolant for prolonged drilling in harder materials, and check chuck tightness before each use to maintain concentricity and extend bit life.