The Dormer Pramet C601 5/8 x 5/8 Inch HSS Flatted Shank 2 Flute Slot Drill is a durable, general‑purpose tool built for machinists and job shops that perform shoulder and slot milling in free machining steel. It combines a 5/8" diameter with a 5/8" Weldon shank for secure seating and reliable, heavy‑duty performance.

• Diameter: 5/8" (15.875 mm)
• Shank type: 5/8" Weldon shank for secure seating and positive drive
• Flutes: 2 flutes for efficient chip evacuation and smooth entry
• Length of cut: 1-5/16" (33.34 mm)
• Overall length: 3-3/4" (95.25 mm)
• Material: High-speed steel (HSS) with bright finish
• Helix angle: 30° for controlled cutting action in steel
• Applications: Shoulder milling, slot milling and ramping in free machining steel
• Standards: ANSI standard
• Brand lineage: Dormer Pramet C601 family

Designed for dependable performance in free machining steel, this 2‑flute slot drill delivers clean, accurate slots and shoulders with consistent repeatability. The Weldon shank locks securely in standard holders, reducing deflection and improving rigidity through every pass. The 30° helix combined with a two‑flute geometry optimizes chip clearance and cutting action, making it well suited for slot milling, shoulder milling, and ramping with smooth entry and reduced vibration. The uncoated bright finish supports easy re‑sharpening and predictable cutting performance, while ANSI compatibility ensures broad tooling system interoperability. A solid choice for shops seeking a versatile, reliable tool for common steel milling tasks that demand precision and durability.