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1/2″ Triple Flute Down-Cut Spiral Bit – 1/4″ Shank (AstraHP Coated)

A large-diameter down-cut built for small spindle CNCs that need more cut width without stepping up to a 1/2″ shank. This 1/2″ cut diameter down-cut CNC bit with a 1/4″ shank allows hobby and light-production CNC machines with Makita or Dewalt to remove more material per pass. The down-cut keeps top edges clean in plywood, melamine, and laminated materials. AstraHP coating helps manage heat and extend edge life—especially important when pushing wider passes on smaller machines. Ideal Use Cases Small CNC machines (Shapeoko, Onefinity, hobby CNC platforms) Trim router setups (Makita, DeWalt, similar) Plywood and melamine cutting where top edge matters

1/2″ Triple Flute Down-Cut Spiral Bit – 1/4″ Shank (AstraHP Coated) - Main image
1/2 inch down cut CNC bit 1/4 shank1/2 inch down cut CNC bit 1/4 shank1/2 inch down cut CNC bit 1/4 shank1/2 inch down cut CNC bit 1/4 shank1/2 inch down cut CNC bit 1/4 shank
$46.07 $71.99 In stock

Category: Down-Cut CNC Bits

Key Features

  • 1/2″ Cut Diameter on 1/4″ Shank – Designed for trim router CNC platforms
  • Triple Flute Geometry
  • Down-Cut Direction – Clean top surface finish
  • AstraHP Coated
  • WidePath – Allows wider passes on lower-power machines

Specs Snapshot

  • Shank: 1/4″
  • Cut Diameter: 1/2″
  • Flutes: 3
  • Direction: Down-Cut
  • Coating: AstraHP
  • Material: Solid Carbide
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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)

Natalie J. ★★★★★

Downward chip evacuation with this bit keeps my workpieces practically dust-free, and the AstraHP coating still looks new after a dozen passes through plywood. The 1/2″ cut on a 1/4″ shank really lets my trim router carve clean dados without bogging down. Perfect for production runs where top surfac

Violet ★★★★★

The triple flute design on this bit leaves an incredibly smooth top surface, and the down-cut action really eliminates any tear-out on plywood veneers. Cuts are clean even on wide passes, which saves me a lot of sanding time.

Ella ★★★★★

After fighting with chip-out on another bit, this widepass geometry let me take much deeper cuts without the surface fuzzing up. The down-cut flute leaves an edge so clean I skipped sanding entirely, and the coating is still showing zero wear after a weekend of plywood.

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