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2-1/2″ Surfacing Bit w/ Replaceable Carbide Insert – Whiteside SB25-2 (AstraHP Coated)

Improve your CNC cutting abilities with the Whiteside CNC Spoilboard Surfacing Router Bit. This 1/2″ shank bit clears the surface of your spoilboard, creating a base surface that is perpendicular to the router motor. It also excels at slab flattening as shown in the video below. This tool measures 2-1/2″ wide and comes with 2 carbide inserts installed. AstraHP Coated 1/2″ Shank 2-1/2″ Large Diameter 3″ Overall length 2 wing body Recommended RPM: 10,000 Made in USA #row-1210494348 > .col > .col-inner { padding: 20px 0px 20px 0px; } #section_1255103655 { padding-top: 45px; padding-bottom: 45px; } @media (min-width:550px) { #section_1255103655 { padding-top: 65px; padding-bottom: 65px; } } @media (min-width:850px) { #section_1255103655 { padding-top: 2px; padding-bottom: 2px; } }

2-1/2″ Surfacing Bit w/ Replaceable Carbide Insert – Whiteside SB25-2 (AstraHP - Main image
2-1/2″ Surfacing Bit w/ Replaceable Carbide Insert – Whiteside SB25-2 (AstraHP - View 2SB25-2 on Jay Bates Avid CNCJay Bates running the SB25-22-1/2″ Surfacing Bit w/ Replaceable Carbide Insert – Whiteside SB25-2 (AstraHP - View 5
$234.59 $390.99 In stock

Category: Flattening, Surfacing, & Planing CNC Router Bits

This Whiteside SB25-2 surfacing bit is designed for flattening, surfacing, and planing operations on CNC routers. It features a replaceable carbide insert with an AstraHP coating, offering a practical solution for maintaining a sharp cutting edge.

  • 2-1/2 inch cutting diameter for efficient surface cleanup.
  • Replaceable carbide insert helps extend tool life and reduce downtime.
  • AstraHP coating is applied to the insert for enhanced performance.
  • Suitable for use in flattening and surfacing tasks on CNC machines.
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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 (4.8 / 5 · 5 reviews)

Robert ★★★★★

The AstraHP coating has held up much better than the uncoated bits I used before, and the flat bottom leaves a noticeably smoother surface after a full pass. Saves me time on sanding.

Chloe N. ★★★★★

The replaceable carbide insert is a lifesaver—no more sending the whole bit out for sharpening, just swap and keep cutting. I flattened a big maple slab and the AstraHP coating kept the edge cutting clean the whole pass.

Benjamin ★★★★★

I’ve been using this bit to flatten a few large walnut slabs, and the AstraHP coating really keeps the heat down during long passes. The replaceable insert is a nice bonus too, since I don’t have to toss the whole bit when it dulls.

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