2.5 mm Verified Special Size
The exact D108.025R catalog identity is verified at 2.5 mm diameter, 70 mm overall length and right hand rotation.


Royce Ayr D108.025R is a 2.5 mm (0.0984 in) right-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.
Right Hand-hand brad-point dowel drill with a 2.5 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 D108 shank platform and right-hand rotation.
The Royce Ayr D108.025R is a right-hand solid-carbide brad-point dowel drill engineered for blind-hole drilling in particleboard, MDF, and solid wood. Its 2.5 mm (0.0984 in) cutting diameter supports repeatable dowel-hole production on compatible CNC drill banks and portable woodworking machines.
The exact product identity verifies 2.5 mm diameter, 70 mm overall length, right-hand rotation and solid-carbide brad-point construction. Royce Ayr publishes D108 as a 10 × 27 mm family platform with 70 mm overall length. Its published D108 dimensional table begins at 3 mm, so no unsupported cutting-edge, b1 or flute-count value is stated for this special 2.5 mm SKU.
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 right-hand rotation, toolholder compatibility, insertion depth, runout, drilling depth, and machine parameters for the material being bored.
Technical Specifications
The exact D108.025R catalog identity is verified at 2.5 mm diameter, 70 mm overall length and right hand rotation.
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 right-hand rotation in the verified D108.025R configuration.
Verify that the boring head, spindle, chuck, or adapter accepts the required shank and is intended for right-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. Do not assume the 43 mm CE / 27 mm b1 / Z2 values published for standard D108 sizes beginning at 3 mm; those values are intentionally not assigned to this 2.5 mm special SKU.
Royce Ayr D108.025R combines a verified 2.5 mm cutting diameter, right-hand rotation, solid carbide tooling, and 70 mm overall length in the D108 family.
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.