17 mm Verified Special Size
The exact D105.170L product identity is verified at 17 mm diameter, 70 mm overall length, left hand rotation and brad-point geometry.


Royce Ayr D105.170L is a 17 mm (0.669 in) left-hand industrial carbide-tipped dowel drill from the D105 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 17 mm 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 D-series shank and left-hand rotation.
The Royce Ayr D105.170L is a left-hand industrial carbide-tipped metric dowel drill engineered for blind-hole drilling in particleboard, MDF, and solid wood. Its 17 mm (0.669 in) cutting diameter suits repeatable dowel-hole production on compatible CNC drill banks and portable woodworking machines.
TitanTooling.ca verifies this SKU at 17 mm diameter, 70 mm overall length and left-hand rotation. Royce Ayr identifies D105 as the industrial carbide-tipped dowel-drill family and publishes a 10 × 20 mm family shank platform. The published standard D105 dimensional table stops at 16 mm, so no unsupported cutting-edge, b1 or flute-count value is stated for this 17 mm special SKU.
Royce Ayr specifies the D105 family with a larger carbide tip and improved geometry for longer life, carbide-tipped construction, a screw in the end for height adjustment, and a 10 mm shank with flat for set screws. Before production, confirm left-hand rotation, toolholder compatibility, insertion depth, runout, drilling depth, and machine parameters for the material being bored.
Technical Specifications
The exact D105.170L product identity is verified at 17 mm diameter, 70 mm overall length, left hand rotation and brad-point geometry.
Royce Ayr publishes the D105 family as a 10 × 20 mm shank / 70 mm OAL industrial dowel-drill platform. This is stated as family-level platform data rather than an unverified cutting-length claim for the 17 mm special size.
D105 Industrial Carbide-Tipped / HW Family is paired with left-hand rotation in the verified D105.170L 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. For D105.170L specifically, do not assume the 43 mm CE / 20 mm b1 / Z2 values published for standard D105 sizes through 16 mm; those dimensions were intentionally not assigned to this 17 mm special SKU.
Royce Ayr D105.170L combines a 17 mm cutting diameter, left-hand rotation, d105 industrial carbide-tipped / hw family, and 70 mm overall length.
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.