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6mm Up-Cut Spiral Bit – 1/4″ Shank (AstraHP Coated)

6mm upcut spiral bit for CNC and router. Strong chip evacuation for grooves, dados, and back panel work. AstraHP Coated Cut Diameter: 6mm Shank: 1/4″ Length of Cut: 1″ Overall Tool Length: 2-1/2″ Made In USA

6mm Up-Cut Spiral Bit – 1/4″ Shank (AstraHP Coated) - Main image
$26.99 $44.99 In stock

Category: Up-Cut CNC Bits

This 6mm up-cut spiral bit with a 1/4-inch shank is designed for clean, efficient cutting in CNC routing applications. The AstraHP coating enhances durability and performance.

  • 6mm cutting diameter with a 1/4-inch shank for compatibility with standard CNC collets.
  • Up-cut spiral geometry helps evacuate chips upward, reducing heat buildup and improving cut quality.
  • AstraHP coated for increased wear resistance and longer tool life.
  • Suitable for a variety of materials, including wood, plastics, and composites.
  • SKU: 425-SRF6MM from BitsBits.com.
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Customer Reviews (4.8 / 5 · 5 reviews)

Chloe W. ★★★★★

Took a chance on this bit for a tricky project with dense hardwood, and the AstraHP coating definitely helps keep the heat down during long runs. The up-cut spiral pulls chips out perfectly, leaving smooth edges that need almost no sanding.

Stella ★★★★★

The 6mm diameter fits perfectly in my CNC collet, and the up-cut design lifted chips out of the cut without clogging. Managed a full hour of continuous routing in hardwood with zero dulling.

George Y. ★★★★★

The AstraHP coating really holds up—after a full day of pocketing, the flutes still look sharp and the edges came out clean with zero fuzz. It's pricier than my old bits, but the durability makes it worth every cent.