7/16 in Verified Diameter
The verified 7/16 in cutting diameter is paired with a 43 mm (1.6929 in) cutting edge for repeatable blind-hole dowel drilling.


Royce Ayr D105.111L is a 7/16 in (0.4375 in / 7/16 in) left-hand carbide-tipped brad-point dowel drill from the D105 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 7/16 in cutting diameter and 70 mm overall length in the Royce Ayr D105 family.
For compatible CNC drill banks, CNC boring systems, and portable woodworking machines configured for the appropriate D105 shank platform and left-hand rotation.
The Royce Ayr D105.111L is a left-hand carbide-tipped brad-point dowel drill engineered for blind-hole drilling in particleboard, MDF, and solid wood. Its 7/16 in (0.4375 in / 7/16 in) cutting diameter supports repeatable dowel-hole production on compatible CNC drill banks and portable woodworking machines.
Royce Ayr lists this D105 configuration with a 43 mm (1.6929 in) cutting edge, 20 mm (0.7874 in) b1 dimension, 10 mm (0.3937 in) shank diameter, and 70 mm (2.7559 in) overall length.
Carbide-tipped construction supports long service life in production boring. Royce Ayr's industrial dowel-drill platforms are intended for CNC drill banks and compatible portable machines drilling blind holes in particleboard, MDF, and solid wood. 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 7/16 in cutting diameter is paired with a 43 mm (1.6929 in) cutting edge for repeatable blind-hole dowel drilling.
The D105 family is configured around a 10 × 20 mm shank platform and 70 mm overall length for compatible production boring systems.
Carbide-Tipped / HW Tooling is paired with left-hand rotation in the verified D105.111L 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 D105.111L combines a 7/16 in cutting diameter, 43 mm cutting edge, left-hand rotation, carbide-tipped / hw tooling, and the D105 10 × 20 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.