Five SpeTool spiral router bits arranged upright in a row.
SpeTool upcut spiral router bit with a dimension diagram and an illustration of a groove in wood.
SpeTool spiral router bit with close-ups of the cutting tip, flutes and shank.
SpeTool upcut spiral router bit diagram with an inset showing a routed wooden edge.
Angled close-up of the cutting tip and spiral flutes on a SpeTool router bit.
Close-up of the spiral cutting flutes on a SpeTool router bit.
SpeTool spiral router bit standing in an orange protective holder.

SpeTool W04031 SC Spiral Plunge 1/8" Dia x 1/8" Shank x 3/4" Cutting Length x 1-1/2" Long 2 Flute Up-Cut Router Bit

SKU: 5PCS SP-D1/8-1/8-U
Sale price$31.99 USD

Shipping calculated at checkout


An Up Cut Router Bit is designed to pull chips upward as it cuts, giving you clean bottom edges and efficient chip removal. Ideal for deep cuts, slotting, and mortising in wood, MDF, and plywood.

Excellent For Cutting:

  • MDF/HDF
  • Plywood
  • Melamine
  • Laminate
  • Softwood/Hardwood
  • Veneered Plywood

TOOL SPECS: Solid carbide, up cut spiral with 1/8" cutting diameter, 1/8" shank, 3/4" cutting length, and 1-1/2" overall length for use in routers with a 1/8" collet.

14 in stock
Quantity:
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Frequently Asked Questions

A helical bit that lifts chips upward, ideal for deep plunges and fast chip evacuation.

Use up-cut for deep pockets and efficient chip removal; choose down-cut when you need a splinter-free top face.

Some top-side splintering can occur; minimize it with a backer board or shallow first pass.

Excessive RPM or slow feed causes heat; sharpen or clean the bit and speed up the feed.

Clear chips with strong dust extraction or pause to vacuum; up-cut flutes already help eject debris.

Compression bits give splinter-free faces on both sides; up-cut is faster but may fray the top veneer.

Extra flutes can improve finish but require slower feed per tooth; 2-flute is a good all-round choice.

Too-deep cuts or slow chip evacuation overheat the small shank—use shallower passes and higher feed.

They’re fine if feed direction is correct and stock is clamped; expect more chip spray than in a table.

Use sharp bits, minimize tool overhang, and match feed to RPM to keep chip load steady.

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D
Dave Arnold
Great bits for the money!

I think these bits are fantastic and highly affordable. I'd purchased more expensive bit from a different vendor, only to find that they became dull very quickly. I've purchased many sets of these for a fraction of the cost and am very happy that I did.

Five SpeTool spiral router bits arranged upright in a row.

SpeTool W04031 SC Spiral Plunge 1/8" Dia x 1/8" Shank x 3/4" Cutting Length x 1-1/2" Long 2 Flute Up-Cut Router Bit

USD 31.99