3 mm Verified Diameter
The catalog identity and source data support the stated diameter, handedness and overall-length configuration for D157.030L.


Royce Ayr D157.030L is a 3 mm left-hand solid-carbide V-point thru-hole drill. Its verified 57 mm overall length and SKU-specific geometry support accurate production drilling in compatible woodworking systems.
Left Hand-hand V-point thru-hole drill with a verified 3 mm diameter and 57 mm overall length in the D157 family.
For compatible CNC drilling and woodworking boring systems configured for left-hand tooling and the verified interface requirements of this SKU.
The Royce Ayr D157.030L is a left-hand V-point thru-hole drill engineered for industrial woodworking drilling. Its verified 3 mm cutting diameter and 57 mm overall length support repeatable production boring.
Published or primary-source data for D157.030L confirms a verified 30 mm cutting length / edge, a 20 mm b1 dimension, a 10 × 20 mm shank platform and Z2 cutting geometry.
Before production, confirm rotation, toolholder or adaptor compatibility, insertion depth, runout, drilling depth, workpiece support, and suitable spindle/feed parameters for the material being machined.
Technical Specifications
The catalog identity and source data support the stated diameter, handedness and overall-length configuration for D157.030L.
The SKU-specific family geometry is retained without importing unsupported dimensions from adjacent drill sizes.
D157.030L is configured for left-hand boring positions and should be installed only in the corresponding machine station or spindle direction.
Verify the exact SKU, rotation, drill-bank or adaptor interface, toolholding condition, insertion depth, runout, drilling depth, workpiece support, and machine parameters before production.
Royce Ayr D157.030L combines a verified 3 mm diameter, left-hand rotation and 57 mm overall length with the verified D157 family geometry stated above.
Correct tool selection, rotation, interface fit, setup, runout control, workpiece support, and machine parameters are essential to the intended drilling performance.