Meet the Dormer Pramet C122 8.0 mm HSS-E plain shank two-flute extra-long slot drill — designed for professionals who need deep slots and shoulder milling in free-machining steels and copper alloys. With extended reach and robust HSS-E construction, it delivers reliable performance in challenging pockets and passages.

• Diameter: 8.0 mm
• Flutes: 2-flute design for rigidity and efficient chip evacuation
• Length of cut: 33 mm
• Overall length: 85 mm
• Shank: 8 mm plain shank
• Material: HSS‑E (cobalt-based) with bright finish
• Helix and rake: 30° helix; 12° rake angle
• Series: Extra Long Series
• Applications: Shoulder milling and slot milling in free-machining steel and copper/copper alloys
• Standards: Dormer standard

The 2‑flute geometry and extra-long reach are optimized for deep slotting and shoulder milling tasks, providing stable cutting in constrained setups. The cobalt-based HSS‑E composition enhances wear resistance and heat tolerance, helping maintain sharpness during longer machining cycles. A bright finish reduces built-up edge and assists with chip flow, while the 30° helix and 12° rake angle promote smooth cutting and clean slot surfaces. The 8 mm plain shank ensures compatibility with common collet and holder systems, making it a reliable choice for deep slots, pockets, and shoulder features in steel and copper alloys.