Dormer Pramet A413 M8 HSS ST STRAIGHT SHANK STEP 180 DEG SHORT SERIES (X2.5D) DRILL

The Dormer Pramet A413 M8 HSS Straight Shank Step Drill is a precision tool engineered to create clean counterbored clearance holes for standard metric threads. Designed for use with both CNC and conventional machines, it’s an efficient choice for engineers, machinists, and workshop hobbyists who need reliable, repeatable hole preparation for M8-threaded assemblies.

With a steam-oxide finish and premium high-speed steel construction, this drill resists workpiece sticking, promotes smooth cutting action, and delivers consistent results across a range of materials including steel, aluminium, and stainless steel.

• 118° pilot and 180° counter bore geometry: Creates the correct clearance drilling diameter and depth for standard metric threads, enabling accurate, repeatable hole preparation every time.
• Steam-oxide finish for smoother cuts: Reduces adhesion of workpiece material to the cutting edge, improving chip flow and extending tool life on tough materials.
• Premium HSS with straight shank: Delivers reliable performance on CNC and manual machines across a variety of materials, providing durability and consistent results in production and maintenance tasks.

This drill helps you speed up assemblies by delivering precise clearance holes with dependable depth control, minimizes rework, and supports a smoother workflow from drill to tap to finish. Built to withstand demanding use, it’s a trustworthy, long-lasting addition to any metalworking toolbox.