Drill bit for metal Smart HSS cylindrical 5.5 mm set of 10 (mpn 24-055)

Set of 10 Smart HSS cylindrical drill bits, each 5.5 mm in diameter, designed for drilling metal. The bits are made of high-speed steel (HSS) to provide cutting hardness and heat resistance suitable for working with a variety of ferrous and non-ferrous metals. Cylindrical shanks allow secure clamping in standard keyed and keyless drill chucks, making the set suitable for workshop, fabrication and repair tasks that require consistent hole size and reliable performance.

Advantages

The high-speed steel construction offers a balance of hardness and toughness for metal drilling, while heat resistance helps maintain edge retention under continuous use. A uniform 5.5 mm diameter across all ten bits ensures repeatable hole sizing. Cylindrical shanks provide compatibility with common drill chucks and straightforward replacement in handheld and bench drills. The set format reduces the need to purchase individual sizes and supports rapid exchange during production or repair work.

Suitable for

• Drilling through sheet metal and thin plate
• Workshop fabrication and metal repairs
• Preparing holes for fasteners and assembly
• Hobbyist metalworking and small-scale production

Key specifications

• Drill material: High-speed steel (HSS)
• Diameter: 5.5 mm
• Shank type: Cylindrical shank (suitable for standard chucks)
• Quantity in set: 10 pieces
• Intended material: Ferrous and non-ferrous metals

How to use

Secure the drill bit in the drill chuck, ensuring the cylindrical shank is centered and tightened to prevent slippage. Select an appropriate drill speed and feed pressure for metal: lower speeds for harder metals and higher speeds for softer alloys, with light, steady pressure to avoid overheating. Use cutting fluid or oil when drilling harder metals or when performing extended drilling to improve chip evacuation and reduce wear. After drilling, withdraw the bit periodically to clear chips and allow cooling.

Usage recommendations

For best results, match drilling speed and coolant use to the specific metal being worked. Use appropriate personal protective equipment such as safety glasses and gloves, and inspect bits regularly for wear or dulling to maintain hole quality and safe operation.