RC-2258 CNC Insert Carbide Spoilboard Surfacing, Rabbeting, Flycutter, Slab Leveler & Surface Planer 4 Dia x 1/2 x 3/4 Shank Router Bit


Usually ships on the 2nd business day from order date.
Diameter (D) 4
(B) Cutting Height 1/2
Shank (d) 3/4
Overall Length (L) 3-11/64
Max Rpm 13,000
Repl. Knives HMA-12 (2)
UPC: 738685922583 SKU: RC-2258 Categories: ,


Insert carbide spoilboard surfacing & rabbeting router bit great for cutting large surface areas and surface planing.

Perfect for:

  • Resurfacing spoilboards using CNC
  • Planing large glued up panels using CNC
  • Surfacing and finishing wood using timber slab machines
  • Rabbeting or slotting

Designed for planing & rabbeting the following materials:

  • MDF
  • Fiberboard
  • Balsa Core*
  • Epoxy (Epoxy Resins)*
  • High Density Urethane (HDU Board)*
  • Plastic/Acrylic*
  • Plywood/Chipboard*
  • Hardwood/Softwood*
  • Ultra-High-Molecular-Weight Polyethylene (UHMWPE)*

*For optimal results and maximum insert life, replace inserts with optional general purpose knives #AMA-12 (sold separately).


  • 4-sided solid carbide insert knives
  • Exclusive carbide grade for highest quality of cut
  • Maximum cutting efficiency
  • Faster material removal process


These industrial router bits feature solid carbide insert knives with four cutting edges that allow users to rotate the knife when one side becomes dull providing the highest-quality finish available on woodworking tools.
Proper torques rating to tighten down screws is 2-3Nm Torques.


(D) Diameter 4
(B) Cutting Height 1/2
(d) Shank 3/4
Overall Length (L) 3-11/64
Max RPM 13,000
Replacement Knives HMA-12 (2)