Engineered for precision and reliability, the Dormer Pramet A242 centre drill is a 4.00 mm diameter, 12.00 mm long tool designed to create accurate center holes in shafts for secure workholding. Ideal for machinists and workshop professionals who need repeatable, clean center holes and dependable performance.

• Diameter: 4.00 mm
• Overall length: 12.00 mm
• Material: HSS-E (premium high-speed steel) for versatile drilling across steel, aluminium, and stainless steel
• Pilot angle: 118° pilot for precise starting holes
• Center cone angle: 60° cone to form a clean, accurate center hole
• Double-ended design: Two drilling ends deliver increased productivity and better tool economy
• Finish: Bright finish reduces workpiece material sticking to the cutting edge
• Series: Long-series design provides extended reach for deeper or harder-to-access centers

The A242 centre drill excels at establishing robust centers in shafts and similar components, enabling secure holding in chucks or fixtures. The 118° pilot and 60° cone work together to deliver quick, accurate centering, which reduces setup time and improves downstream hole quality. With a bright finish that minimizes build-up and a practical double-ended design, this drill offers dependable performance across a range of materials—including steel, aluminium, and stainless steel—while its longer length expands usable scenarios where reach matters.