8 mm · 20 mm CE
The catalog identity explicitly supplies the 8 mm diameter and 20 mm cutting edge for this left hand D139 countersink drill.


Royce Ayr D139.082L is an 8 mm left-hand countersink drill with a verified 20 mm cutting edge and 70 mm overall length for compatible woodworking boring systems.
Left Hand-hand industrial drilling configuration with a verified 8 mm diameter and 70 mm overall length.
For compatible CNC drill banks, CNC boring systems, and woodworking drilling equipment configured for left-hand tooling and the required machine interface.
The Royce Ayr D139.082L is a left-hand industrial woodworking drilling tool engineered for accurate production boring. Its verified 8 mm diameter and 70 mm overall length are retained directly from published or exact catalog data.
The exact Magento/Titan product identity supplies an 8 mm diameter, 20 mm cutting edge, 70 mm overall length and left-hand countersink configuration. Current Royce drilling data identifies the D100–D155 countersink family as carbide-tipped / HW tooling, supporting the carbide image route. No unsupported b1, shank or flute-count value is introduced.
Before production, confirm left-hand rotation, toolholder compatibility, insertion depth, runout, drilling depth, secure workpiece support, and suitable spindle/feed parameters for the material being machined.
Technical Specifications
The catalog identity explicitly supplies the 8 mm diameter and 20 mm cutting edge for this left hand D139 countersink drill.
The SKU-specific overall length and geometry are retained without importing unsupported dimensions from adjacent Royce drill families.
D139.082L is configured for left-hand boring positions and should be installed only in the corresponding machine station or spindle direction.
Verify that the boring head, spindle, chuck, or adapter is intended for left-hand tooling. Confirm clean toolholding, minimal runout, correct insertion, appropriate drilling depth, secure workpiece support, and suitable spindle/feed parameters before production. Confirm the required countersink geometry and machine interface before production; b1, shank and Z values are intentionally not inferred.
Royce Ayr D139.082L retains its verified 8 mm diameter, 20 mm cutting edge, left-hand rotation and 70 mm overall length.
It is intended for accurate industrial woodworking drilling on compatible CNC drill banks, boring equipment, and production systems.