Carbide Counterbore Drills
Solid-carbide drill for machining steel, stainless steel and cast iron, for counterboring. OK Premium coated, Ø3.4–14 mm (7 catalogue items). Ships in a single coating option. Rated for ISO P/M/K material classes. Part of Okazaki's drilling tool range.
Engineered for performance
Solid-Carbide Substrate, OK Premium Coating
OK Premium coating is standard — no uncoated option — across all 7 catalogue sizes.
Counterboring Geometry
The catalogue's own "counterbore" drill designation enlarges the top of an existing hole to seat a bolt head or fitting, distinct from a standard through-hole production drill.
Steel, Stainless & Cast-Iron Coverage
Rated for ISO P (steel), M (stainless steel) and K (cast iron) material groups.
Ø3.4–14 mm, 65–115 mm Overall Length
Diameters run Ø3.4–14 mm, with overall lengths from 65 to 115 mm across 7 sizes.
Material applicability
Sizes & part numbers
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| ORDER NO. | Ø | FLUTE L | OAL | SHANK |
|---|---|---|---|---|
| SDZA-M03 | 3.4 mm | 25 | 65 | 8 |
| SDZA-M04 | 4.5 mm | 35 | 75 | 8 |
| SDZA-M05 | 5.5 mm | 40 | 85 | 10 |
| SDZA-M06 | 6.6 mm | 45 | 90 | 12 |
| SDZA-M08 | 9 mm | 55 | 100 | 12 |
| SDZA-M10 | 11 mm | 60 | 110 | 16 |
| SDZA-M12 | 14 mm | 65 | 115 | 20 |
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