Drill bit GRAPHITE HSS straight shank for metal 4.8 mm (55H021)

GRAPHITE HSS drill bit with a straight shank, 4.8 mm diameter, designed specifically for drilling metal. Manufactured from high-speed steel (HSS), this drill bit offers increased wear resistance and can withstand elevated temperatures that occur during metalworking. The cylindrical (straight) shank is suitable for use in both handheld drills and drill presses, providing a reliable solution for general metal fabrication, maintenance and repair tasks.

Advantages

The HSS material ensures a durable cutting edge and improved heat tolerance compared with standard carbon steel bits, reducing wear during continuous drilling operations. The 4.8 mm diameter provides precise hole dimensions for a range of metalworking applications. The straight shank enables secure clamping in standard drill chucks and simplifies bit changes between portable and stationary equipment. Overall design supports consistent chip evacuation and steady drilling performance in various ferrous and non-ferrous metals.

Suitable for

• Drilling holes in sheet metal, steel plates and aluminium components
• General metal fabrication and assembly
• Maintenance, repair and retrofit work with handheld drills or drill presses
• Preparing holes for fasteners such as bolts, rivets and screws

Key specifications

• Material: high-speed steel (HSS)
• Shank type: straight / cylindrical
• Diameter: 4.8 mm
• Primary use: metal drilling
• Compatibility: handheld drills and drill presses with standard chucks

How to use

Secure the drill bit firmly in the drill chuck, ensuring the straight shank is fully inserted and tightened. Select an appropriate spindle speed for the metal type and thickness — lower speeds for harder steels, higher speeds for softer metals and aluminium. Apply steady pressure and keep the drill perpendicular to the work surface to achieve accurate holes. Use cutting fluid or lubricant when drilling thicker or harder metals to reduce heat buildup and extend tool life. Clear chips regularly to avoid clogging and overheating.

Usage recommendations

For best results, match drill speed and feed rate to the specific metal: use reduced speed for stainless steel and higher speeds for aluminium. Apply a light cutting oil when drilling ferrous metals and maintain firm, even pressure without forcing the bit. Inspect the cutting edge before use and replace the bit when wear or chipping affects hole quality.