The Dormer Pramet A978 6.50 mm HSS-E High-Performance Multi-Application Straight Shank Extra-Long Drill is built for serious deep-hole work across metals, combining reach, precision, and reliable cutting performance in a single, purpose-built tool.

Why this drill stands out

• 130° point for self-centering and reduced push force: The geometry guides the bit into the workpiece with minimal wandering, delivering clean starts and reducing operator effort during breakout.
• Bright finish: A smooth, non-stick edge resists built-up material adhesion, extending tool life and improving hole quality in challenging workpieces.
• Parabolic flute design for deep-hole drilling in a single pass: Efficient chip evacuation and stable drilling when you need to reach deeper than standard drills—minimizing re-drilling and improving cycle times.
• Premium HSS-E material: Versatile performance across a wide range of materials—including steel, aluminum, and stainless steel—providing dependable drilling in mixed-metal environments.
• Extra-long length series with straight shank: Specifically chosen when deep-hole access, long reach, or complicated setups require extended tool projection without changing the tooling philosophy.
• DIN 1869 compliant sizing: Designed to meet established DIN standards for reliable interchangeability in compatible collets, holders, and machines.
• Pack of 3 drills: A practical ready-to-use set for jobs that demand consistency and conformity across multiple holes or frequent replacements.

Ideal applications and practical use

Designed for multi-material environments, this drill excels in automotive, aerospace, mold-making, and general engineering tasks where deep holes are routine. Use it for:

• Deep-hole drilling in steel, stainless steel, and aluminum workpieces where access is constrained or long reach is essential.
• Machining extrusions, brackets, and housings that require holes beyond the reach of standard-length drills.
• Production setups that benefit from consistent hole quality and reduced tool changes due to its multi-application capability.

How to maximize performance

• Match cutting speed and feed to the material type—start with moderate rpm and a steady feed, then adjust to maintain a clean chip and minimal heat buildup.
• Use appropriate cutting fluid or coolants for steel and stainless workpieces to extend tool life and improve surface finish.
• Maintain a straight, stable drilling posture to leverage the self-centering geometry and reduce drift when starting the hole.
• In very deep holes, periodically retract the drill to clear chips and prevent clogging, ensuring continuous, smooth cutting action.

Specifications at a glance

• Diameter: 6.50 mm
• Material: HSS-E (high-speed steel with enhanced wear resistance)
• Tip geometry: 130° point
• Flute design: Parabolic for deep-hole efficiency
• Shank: Straight
• Length: Extra-long series
• DIN standard: 1869
• Quantity: 3-pack

When your projects demand trustworthy depth, reach, and consistent hole quality across a variety of metals, the Dormer Pramet A978 6.50 mm HSS-E drill delivers reliable performance with every plunge. A practical choice for workshops that tackle deep-hole tasks without switching tooling mid-project.