Low-Helix Chipbreaker Geometry
Purpose-built for challenging composite laminates over wood or wood-composite cores, including CFRP and fiberglass-faced constructions.


Solid-carbide three-flute right-hand low-helix chipbreaker for CNC routing composite materials with wood or wood-composite cores and CFRP or fiberglass laminates. Its 1/2-inch cutting diameter, 1-1/4-inch cutting edge, 0.313-inch upcut section, 3/4-inch shank, and 4-inch overall length are configured for demanding composite-panel and entry-door cutout applications.
Three-flute right-hand low-helix chipbreaker geometry developed for composite materials with wood or wood-composite cores and CFRP or fiberglass laminates.
Designed for compatible CNC routers using precision 3/4-inch collets or approved 3/4-inch toolholding systems in composite door and laminated-composite routing applications.
The Royce Ayr R60-17008 is a three-flute low-helix chipbreaker router bit for composite materials built around wood or wood-composite cores with CFRP or fiberglass laminates. Royce Ayr specifically identifies the family for cutouts in composite entry doors and other compatible laminated-composite routing operations.
The current manufacturer specification is a 0.5000-inch cutting diameter, 1.250-inch cutting edge, 0.313-inch upcut length, 0.750-inch shank, three flutes, right-hand rotation, and a 4.000-inch overall length. The low-helix chipbreaker geometry is intended to manage demanding composite cutting while limiting aggressive lifting action compared with steeper helix designs.
This exact base SKU is listed with coating type None. Royce Ayr places the Low Helix Chipbreaker family within its Solid Carbide Tooling range. Correct collet condition, tool projection, runout, feed rate, spindle speed, pass depth, workholding, and extraction remain essential when machining CFRP, fiberglass, wood, or wood-composite stacks.
Technical Specifications
Purpose-built for challenging composite laminates over wood or wood-composite cores, including CFRP and fiberglass-faced constructions.
The published 0.313-inch upcut section works within the low-helix chipbreaker geometry while preserving the exact R60-17008 configuration.
R60-17008 is the base version with coating type None, distinct from the otherwise dimensionally matching Ultimax-coated R60-17008UM variant.
Confirm that the CNC router toolholder accepts the exact 3/4-inch (19.05 mm) shank and provides sufficient clearance for the 4-inch overall tool length. Verify right-hand spindle rotation, collet condition, runout, tool projection, workholding, extraction, and the actual laminate/core construction before production. Composite materials can vary significantly, so spindle speed, feed rate, pass depth, entry strategy, and extraction should be established for the specific CFRP, fiberglass, wood, or wood-composite stack being machined.
Royce Ayr R60-17008 combines a 1/2-inch diameter, 1-1/4-inch cutting edge, 0.313-inch upcut section, 3/4-inch shank, three right-hand flutes, and 4-inch overall length for composite routing.
Its low-helix chipbreaker geometry is matched to composite entry-door and laminated-core applications where controlled cutting, edge integrity, and predictable CNC performance are required.