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5mm Down-Cut Spiral Bit – 1/4″ Shank (AstraHP Coated)

5mm down-cut spiral bit for clean top edges in sheet goods. Ideal for grooves, dados, and small feature work. AstraHP Coated Cut Diameter: 5mm Shank: 1/4″ Length of Cut: 7/8″ Overall Tool Length: 2-1/2″ Made In USA #row-172928485 > .col > .col-inner { padding: 20px 0px 20px 0px; } #section_956910320 { padding-top: 45px; padding-bottom: 45px; } @media (min-width:550px) { #section_956910320 { padding-top: 65px; padding-bottom: 65px; } } @media (min-width:850px) { #section_956910320 { padding-top: 2px; padding-bottom: 2px; } }

5mm Down-Cut Spiral Bit – 1/4″ Shank (AstraHP Coated) - Main image
$27.89 $44.99 In stock

Category: Down-Cut CNC Bits

This 5mm down-cut spiral bit with a 1/4-inch shank is designed for clean, chip-free cuts in CNC routing applications. The AstraHP coating helps reduce friction and heat buildup for smoother operation and longer tool life.

  • Down-cut geometry pushes chips downward, minimizing tear-out on the top surface of your workpiece.
  • 5mm cutting diameter is suitable for detailed and precise routing tasks.
  • 1/4-inch shank fits standard CNC collets and routers.
  • AstraHP coating enhances durability and performance.
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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Jason C. ★★★★★

The AstraHP coating really pulls its weight here—my spindle runs noticeably cooler even after an hour of continuous pocketing, and the bit stays sharp. Edges on my plywood parts came out clean with zero tear-out on the top surface, which is exactly what I needed for a client-facing job.

Mia O. ★★★★★

Finally a down-cut bit that actually leaves zero chip-out on my plywood edges. The AstraHP coating really seems to make a difference, as the bit ran noticeably cooler than my uncoated ones. I've already ordered a second size.

Evelyn ★★★★★

Ran it through a full sheet of plywood with zero tear-out on the top surface, and the AstraHP coating definitely kept the heat down even on the last pass. The 5mm diameter with the 1/4″ shank is a solid combo for detail work, and the bit still feels sharp afterward.