Dormer Pramet A170 15.50 mm HSS ST STRAIGHT SHANK JOBBER DRILL, 1/2IN SHANK

The Dormer Pramet A170 15.5 mm HSS straight shank jobber drill is a versatile general‑purpose tool for metalworking. With a 15.5 mm diameter and a 1/2 in parallel shank, it fits standard chucks in handheld drills and machine tools, making holemaking reliable across a range of materials.

Made from premium high‑speed steel and featuring an 118° conventional point, this drill starts cleanly, resists wandering, and is easy to re‑sharpen for long service life. The steam oxide finish helps prevent workpiece material from sticking to the edge, promoting smoother cutting and efficient chip evacuation.

• 118° conventional point for reliable starts: Provides a strong, self‑centering bite that starts holes cleanly and is easy to re‑sharp, helping reduce wandering and extend tool life.
• Steam oxide finish minimizes sticking: Anti‑adhesion surface keeps cutting edges clear, improving chip flow and cutting efficiency on steel, aluminum, and stainless steel.
• 1/2 in parallel shank for compatibility: Fits standard chucks in handheld tools and machines, delivering a secure grip and stable drilling for larger diameter bits.

This drill is built to support efficient, repeatable holemaking across a wide range of projects. The combination of durable HSS, a positive start geometry, and a finish that reduces built‑up material means fewer tool changes, less downtime, and consistently clean holes—whether you’re machining steel parts, fabricating aluminum components, or setting stainless steel fasteners. It’s a dependable choice for engineers, fabricators, and serious hobbyists who value predictable results and straightforward maintenance.