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3/8″ Down-Cut Spiral Bit – 1/4″ Shank (AstraHP Coated)

AstraHP Coated Solid Carbide 3 Flute Shank Diameter: 1/4″ Length of Cut: 1″ Tool Length: 2-1/2 inches Also available in Up-Cut Made in USA #row-1737558337 > .col > .col-inner { padding: 20px 0px 20px 0px; } #section_1038081047 { padding-top: 45px; padding-bottom: 45px; } @media (min-width:550px) { #section_1038081047 { padding-top: 65px; padding-bottom: 65px; } } @media (min-width:850px) { #section_1038081047 { padding-top: 2px; padding-bottom: 2px; } }

3/8″ Down-Cut Spiral Bit – 1/4″ Shank (AstraHP Coated) - Main image
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$43.46 $68.99 In stock

Category: Down-Cut CNC Bits

This 3/8-inch down-cut spiral bit with a 1/4-inch shank is designed for CNC routing applications that require a clean top surface finish. The down-cut geometry helps to minimize tear-out on the top edge of the material, making it a practical choice for precision work. The AstraHP coating is applied to enhance durability and performance during use.

  • Down-cut spiral design for reduced top-surface splintering
  • 3/8-inch cutting diameter with a 1/4-inch shank for compatibility with standard CNC collets
  • AstraHP coated for improved wear resistance and smoother cutting action
  • Suitable for a variety of materials commonly used in CNC routing projects
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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)

Abigail ★★★★★

I was pleasantly surprised at how cleanly this bit cuts through melamine—no chip-out at all on the top layer. The down-cut design really does keep the surface smooth, even on detailed inlays.

Zoe ★★★★★

I’ve been fighting tear-out on my plywood tops for months, and this down-cut bit finally gives me that crisp, chip-free edge I was after. The 3/8″ size with the 1/4″ shank fit my router perfectly, and the coating seems to be holding up well after a dozen or so passes.

Steven ★★★★★

The AstraHP coating on this bit has held up impressively across several plywood sheets, and the down-cut action really keeps the top edge chip-free. I’m getting consistent, clean passes without any burning, even at moderate feed rates. Definitely a keeper for CNC work where finish matters.

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