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1/8″ Long-Reach Up-Cut Spiral Bit (AstraHP Coated)

Up-Cut spiral bits are a workhorse bit for any CNC setup. 1/8″ tip diameter is a versatile size to handle all types of cuts on a router or CNC machine, from profiles, detailed carving and drilling cribbage boards. AstraHP Coated Solid Carbide Tip diameter: 1/8″ Shank Diameter: 1/4″ Flute Length: 7/8″ Length of reach: 1/8″ Total Length of cut: 1″ Overall Length: 2-1/2″ Previously SRF4-125UP Recommended RPM: 16,000 Also available in 5/8″ Length of cut Made In USA #row-75198836 > .col > .col-inner { padding: 20px 0px 20px 0px; } #section_130869766 { padding-top: 45px; padding-bottom: 45px; } @media (min-width:550px) { #section_130869766 { padding-top: 65px; padding-bottom: 65px; } } @media (min-width:850px) { #section_130869766 { padding-top: 2px; padding-bottom: 2px; } }

1/8″ Long-Reach Up-Cut Spiral Bit (AstraHP Coated) - Main image
AstraHP Coated Bits&Bits 425-SRF125LR 1/8" up-cut CNC bitAstraHP Coated Bits&Bits 425-SRF125LR 1/8" up-cut CNC bitBits&Bits AstraHP Coated 425-SRF125 1/8" Up-cut CNC Router Bit & Long Reach
$30.59 $44.99 In stock

Category: Up-Cut CNC Bits

This 1/8-inch long-reach up-cut spiral bit is designed for CNC routing applications that require efficient chip evacuation and a clean bottom cut. The AstraHP coating helps reduce heat buildup and extends tool life during demanding jobs.

  • 1/8-inch cutting diameter with an extended reach for deeper cuts and clearance in tight areas.
  • Up-cut spiral geometry pulls chips upward, reducing clogging and improving surface finish.
  • AstraHP coating provides added durability and heat resistance for abrasive materials.
  • Suitable for use with CNC routers and other automated cutting machines.
  • SKU: 425-SRF125LR (Standard).
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Customer Reviews (4.8 / 5 · 5 reviews)

Ruby ★★★★★

Cutting through 3/4-inch plywood in a single pass, this bit keeps the chip evacuation clean and the edge crisp. The AstraHP coating really does seem to keep temperatures down during long runs. A solid upgrade from standard bits for deep pocketing.

Emma M. ★★★★★

I’ve been cutting some pretty deep slots in hardwood, and the chip evacuation on this bit is honestly impressive—no clogging, clean bottom finish every time. The long reach let me get into those tight spots without any deflection, and the AstraHP coating kept things cool even on a longer run.

Natalie M. ★★★★★

The AstraHP coating really does its job—my bits used to come out scorching hot after long runs, but this one stays cool enough to touch right after finishing a deep pocket. Chip evacuation is flawless too, leaving a bottom cut so clean I barely need a sanding pass.

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