3 mm Verified Diameter
The verified 3 mm cutting diameter is paired with a 43 mm (1.6929 in) cutting edge for repeatable blind-hole dowel drilling.


Royce Ayr D108.030L is a 3 mm (0.1181 in) left-hand solid-carbide brad-point dowel drill from the D108 family. Its verified 70 mm (2.7559 in) overall length supports precision blind-hole boring in compatible woodworking production systems.
Left Hand-hand brad-point dowel drill with a 3 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 D108 shank platform and left-hand rotation.
The Royce Ayr D108.030L is a left-hand solid-carbide brad-point dowel drill engineered for blind-hole drilling in particleboard, MDF, and solid wood. Its 3 mm (0.1181 in) cutting diameter supports repeatable dowel-hole production on compatible CNC drill banks and portable woodworking machines.
Royce Ayr lists this D108 configuration with a 43 mm (1.6929 in) cutting edge, 27 mm (1.0630 in) b1 dimension, 10 mm (0.3937 in) shank diameter, Z2 / two cutting edges, and 70 mm (2.7559 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 verified 3 mm cutting diameter is paired with a 43 mm (1.6929 in) cutting edge for repeatable blind-hole dowel drilling.
The D108 family is configured around its verified shank geometry and 70 mm overall length for compatible production boring systems.
Solid Carbide Tooling is paired with left-hand rotation in the verified D108.030L 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 D108.030L combines a 3 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.