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1/2″ Up-Cut Roughing Spiral CNC Bit – Whiteside RU5125H (AstraHP Coated)

The Whiteside 5125H 3-flute up-cut roughing spiral is built for fast stock removal and aggressive roughing passes on CNC routers. Ideal for hardwood, plywood, and production work where clearing chips quickly matters. • Rapid stock removal in hardwood and plywood • Roughing passes before finishing tools • CNC profiling and pocketing where chip evacuation matters • Production cutting on rigid CNC machines

1/2″ Up-Cut Roughing Spiral CNC Bit – Whiteside RU5125H (AstraHP Coated) - Main image
3 Flute Up-Cut Roughing Spiral CNC Bit3 Flute Up-Cut Roughing Spiral CNC Bit
$93.14 $134.99 In stock

Category: Up-Cut CNC Bits

The Whiteside 5125H is designed for one job: move material fast while keeping the cut stable and predictable.

This 3-flute up-cut spiral uses a roughing geometry that breaks chips into smaller pieces so the cutter can maintain feed rates without packing chips in the kerf. The result is smoother machine operation and efficient stock removal when roughing hardwoods, plywood, and other dense materials on CNC routers.

Compared to standard spiral end mills, roughing spirals reduce cutting pressure by interrupting the chip. This allows higher feed rates and helps prevent heat buildup when removing larger volumes of material.

This tool is ideal for roughing passes before a finishing tool, or for jobs where ultimate edge finish is less critical than speed and chip evacuation.

  • AstraHP Coated
  • 3 Flute
  • 1/2″ cutting diameter
  • 1/2″ shank
  • 1-1/4″ length of cut
  • 3” overall length
  • Recommended RPM: 16,000
  • Made In USA
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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)

Ella E. ★★★★★

I needed to clear a lot of material quickly on a cabinet project, and this bit’s 3-flute roughing geometry really does keep the chips small and the cut stable. It powered through hardwood without any vibration, and the AstraHP coating seemed to reduce heat noticeably.

Natalie ★★★★★

The chip evacuation on this bit is noticeably better than my old 2-flute, letting me push feed rates without worrying about heat buildup. It chewed through a full sheet of plywood with zero chatter and a surprisingly clean finish for a roughing bit.

Steven B. ★★★★★

I was skeptical about the 3-flute roughing geometry, but it really does break chips into tiny pieces. The AstraHP coating seems to be holding up well after several hours of cutting hard maple.

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