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1/2″ Triple-Flute Down-Cut Spiral Bit (AstraHP Coated)

3 flute down-cut spiral CNC bit provides more cutting edges, distributing the cutting load more evenly across the tool. This results in smoother cuts and reduces the likelihood of chatter or vibration, especially in softer materials or thin workpieces and is ideal for laminates, veneers, or materials prone to tear-out. AstraHP Coated Solid Carbide Tip diameter: 1/2″ Length of cut: 1″ Overall length: 3″ 3 flute for smoother finish Recommended RPM: 16,000 Made In USA #row-945456283 > .col > .col-inner { padding: 20px 0px 20px 0px; } #section_1553307663 { padding-top: 45px; padding-bottom: 45px; } @media (min-width:550px) { #section_1553307663 { padding-top: 65px; padding-bottom: 65px; } } @media (min-width:850px) { #section_1553307663 { padding-top: 2px; padding-bottom: 2px; } }

1/2″ Triple-Flute Down-Cut Spiral Bit (AstraHP Coated) - Main image
AstraHP Coated Bits&BIts 3 Flute 1/2" down-cut spiral bitAstraHP Coated Bits&BIts 3 Flute 1/2" down-cut spiral bitAstraHP Coated Bits&BIts 3 Flute 1/2" down-cut spiral bit
$71.99 $99.99 In stock

Category: Down-Cut CNC Bits

This 1/2-inch triple-flute down-cut spiral bit from BitsBits.com features an AstraHP coating, designed for CNC routing applications where a clean top surface finish is desired. The down-cut geometry helps press material downward during cutting, which can reduce chipping on the top edge of the workpiece.

  • Triple-flute design for efficient material removal and smoother cutting action.
  • Down-cut spiral helps minimize tear-out on the top surface of the material.
  • AstraHP coating provides a durable surface layer for extended tool life.
  • 1/2-inch shank diameter fits standard CNC collets.
  • Ideal for use with wood and wood-based composites in CNC routers.
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Customer Reviews (5.0 / 5 · 5 reviews)

Abigail ★★★★★

The AstraHP coating has held up beautifully through a full day of production runs, and that triple-flute down-cut geometry really delivers the clean top surface I was after. I've already ordered a backup.

Olivia ★★★★★

Took a chance on this bit for a tricky sign project and the down-cut action left the top surface so smooth I barely needed sanding. The AstraHP coating still looks new after several hours of hardboard work.

Kevin C. ★★★★★

That triple-flute design clears chips way better than my old two-flute bits, and the down-cut really does keep the top edge of plywood from chipping. I've run it through a solid 20 sheets of melamine and the coating is still going strong, no sign of wear yet.

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