Drill bit Irwin 10502560 twist drill bit 7.5 mm, 1 pc

Irwin 10502560 is a single twist drill bit with a 7.5 mm diameter designed for precision drilling in demanding metalworking tasks. Made from high-speed steel with 5% cobalt, this 7.5 mm drill bit delivers improved heat and abrasion resistance compared with standard HSS bits. The 135° split point starts cutting immediately to reduce bit walking and the heavy-duty web construction increases strength and durability for repeated use in tough conditions.

Advantages

The HSS cobalt composition with 5% cobalt provides enhanced wear resistance and higher temperature tolerance, extending tool life when drilling alloyed or hardened steels. The 135° split point ensures quicker centering and reduces the need for pilot holes, while the robust web and DIN 338 manufacturing standard contribute to consistent performance and dimensional accuracy. A cylindrical shank fits common drill chucks for straightforward installation.

Suitable for

• Drilling through alloyed steel and other hardened metals
• General workshop metalworking and maintenance tasks
• Applications requiring a 7.5 mm diameter hole
• Use with standard drill chucks and portable drills

Key specifications

• Type: twist drill bit
• Diameter: 7.5 mm
• Overall length: 109 mm
• Material: high-speed steel with 5% cobalt
• Point angle: 135° split point for reduced walking
• Shank type: cylindrical shank
• Pack quantity: 1 piece
• Manufacturing standard: DIN 338

How to use

Secure the drill bit in a suitable drill chuck, ensuring the cylindrical shank is fully seated and tightened. Use appropriate cutting speeds and feed rates for the workpiece material—lower speeds for hardened or stainless steels—to reduce heat build-up. Apply steady axial pressure and allow the bit to cut without excessive side load. For deeper holes, retract periodically to clear chips and, if needed, use cutting fluid or coolant to improve chip evacuation and prolong bit life.

Usage recommendations

Use suitable personal protective equipment, clamp the workpiece securely, and select drilling speeds appropriate for alloyed or stainless steels. For best results on hardened materials, use cutting fluid and moderate drilling speeds to minimize wear; sharpen or replace the bit when cutting performance declines.