Premium CNC & Router Bits for Precision Cutting

1/4″ Down-Cut Spiral Bit (AstraHP Coated)

A must-have in your CNC tool arsenal, the 1/4″ spiral down cut CNC router bit produces smooth, clean cuts with minimal chip-out or edge fraying! AstraHP Coated Solid Carbide Tip diameter: 1/4″ (.25″) Shank Diameter: 1/4″ (.25″) Length of cut: 1″ Overall Length: 2-1/2″ Made In USA #row-433137322 > .col > .col-inner { padding: 20px 0px 20px 0px; } #section_1680928848 { padding-top: 45px; padding-bottom: 45px; } @media (min-width:550px) { #section_1680928848 { padding-top: 65px; padding-bottom: 65px; } } @media (min-width:850px) { #section_1680928848 { padding-top: 2px; padding-bottom: 2px; } }

1/4″ Down-Cut Spiral Bit (AstraHP Coated) - Main image
$31.94 $44.99 In stock

Category: Down-Cut CNC Bits

What is a Down-cut bit?

A down-cut spiral bit is a great tool to have for woodworking and CNC work, especially when you want clean, smooth cuts on the top surface of your material. It’s perfect for cutting things like plywood or laminates because it helps prevent splintering and keeps the top edges looking sharp. The way it pushes the material down as it cuts makes it ideal for creating grooves or pockets where you want the surface to stay neat.

Previous part number 420-DNC250.

Comparable to Whiteside RD2100 and Amana 46202 / 46202-K.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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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 (5.0 / 5 · 5 reviews)

Ella ★★★★★

Finally got this bit to try on some walnut plaques and the AstraHP coating really does keep the heat down noticeably. Cuts are crisp with zero fuzzies on the top.

Natalie ★★★★★

This bit leaves the top edge of my maple plywood absolutely chip-free, which is a huge time saver on finished panels. The down-cut action pulled the dust down nicely, keeping my work surface clear. Cleanest top surface I’ve gotten without sanding first.

Andrew ★★★★★

Finally a down-cut bit that keeps my plywood top layer completely chip-free. The AstraHP coating definitely helps it glide through cuts without burning the edges.