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1/4″ Low-Helix Up-Cut Spiral Bit (AstraHP Coated)

Low Helix up-cut spiral bits excel in plastics, acrylics and foam, and even work well in wood and plywood. Also called ‘open helix’ or ‘slow helix’, these low helix CNC bits have less twist than a standard bit, reducing material uplift while cutting. Also features a radiused corner of 0.001″. AstraHP Coated Solid Carbide Tip diameter: 1/4″ Shank diameter: 1/4″ Length of cut: 1″ Corner Radius: 0.001″ Overall Length: 2-1/2″ Made in the USA #row-249508370 > .col > .col-inner { padding: 20px 0px 20px 0px; } #section_1656636471 { padding-top: 45px; padding-bottom: 45px; } @media (min-width:550px) { #section_1656636471 { padding-top: 65px; padding-bottom: 65px; } } @media (min-width:850px) { #section_1656636471 { padding-top: 2px; padding-bottom: 2px; } }

1/4″ Low-Helix Up-Cut Spiral Bit (AstraHP Coated) - Main image
$26.99 $44.99 In stock

Category: 1 43 Shank Spiral Bits

Excellent for Cutting:

  • Plastic/Acrylic
  • LED Back-lit and Side-lit displays and control panels
  • Corian
  • Fiberglass
  • Corrugated Plastics such as Correx Boards and Polypropylene
  • Dibond
  • Plexiglas
  • Hard/Soft wood
  • Wood cabinetry and sign making

Made in the USA by Bits & Bits.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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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 (4.6 / 5 · 5 reviews)

Isabella H. ★★★★★

Bought this mainly for trimming 1/4" plexiglass and the AstraHP coating really does keep chips from welding to the flutes. Cuts stay clean even after a few sheets, no melting or chatter like my old bit.

Ellie V. ★★★★★

The up-cut geometry on this bit leaves a clean top edge on Plexiglas with almost no chipping, which I wasn't expecting at this price. I've run it through a few sheets of Dibond and Corian too and it still cuts like new.

Ellie ★★★★★

Bought this for a batch of acrylic display panels and the AstraHP coating really does keep the edge cooler, no melting or gumming up along the cut line. Finish on the edges came out clean enough that I barely had to scrape them.