5 mm Dowel-Hole Diameter
The 5 mm cutting diameter is paired with a 43 mm (1.693 in) cutting edge for blind-hole dowel drilling in supported woodworking materials.


Royce Ayr D108.050L is a 5 mm (0.197 in) left-hand solid-carbide dowel drill from the D108 family. Its verified 70 mm (2.756 in) overall length and brad-point dowel-drilling geometry support blind-hole boring in compatible woodworking production systems.
Left Hand-hand dowel drill with a 5 mm cutting diameter and 70 mm overall length in the Royce Ayr D108 family.
For compatible CNC drill banks, CNC boring systems, and portable woodworking machines configured for the appropriate D-series shank and left-hand rotation.
The Royce Ayr D108.050L is a left-hand solid-carbide metric dowel drill engineered for blind-hole drilling in particleboard, MDF, and solid wood. Its 5 mm (0.197 in) cutting diameter suits repeatable dowel-hole production on compatible CNC drill banks and portable woodworking machines.
Royce Ayr lists this D108 configuration with a 43 mm (1.693 in) cutting edge, 27 mm (1.063 in) b1 dimension, 10 mm (0.394 in) shank diameter, and 70 mm (2.756 in) overall length.
Solid-carbide construction is specified for maximum wear resistance and strength, and Royce Ayr incorporates a screw in the end of the tool for height adjustment. Before production, confirm left-hand rotation, toolholder compatibility, insertion depth, runout, drilling depth, and machine parameters for the material being bored.
Technical Specifications
The 5 mm cutting diameter is paired with a 43 mm (1.693 in) cutting edge for blind-hole dowel drilling in supported woodworking materials.
The D108 family uses a 10 × 27 mm shank platform and 70 mm overall length for compatible CNC drill-bank and portable woodworking boring systems.
Solid Carbide Tooling is paired with left-hand rotation and two cutting edges in the verified D108.050L configuration.
Verify that the boring head, spindle, chuck, or adapter accepts the required shank and is intended for left-hand tooling. Confirm clean toolholding, minimal runout, correct insertion and height adjustment, appropriate drilling depth, secure workpiece support, and suitable spindle/feed parameters before production.
Royce Ayr D108.050L combines a 5 mm cutting diameter, 43 mm cutting edge, left-hand rotation, Z2 geometry, solid carbide tooling, and the D108 10 × 27 mm shank / 70 mm overall-length platform.
It is intended for blind-hole drilling in particleboard, MDF, and solid wood on compatible CNC drill banks, CNC boring equipment, and portable woodworking machines.