AYTJRDCBTAHSS Counterbore Drill JIS DCBTA已售出0個HSS Counterbore Drill JIS DCBTA, a JIS-spec counterbore drill forming the pilot hole and counterbore together - no second setup. Body diameter 6.5~29mm, overall length 60~130mm, available in 14 sizes. Works on carbon steel, alloy steel plus aluminum, copper and other non-ferrous metals up to HRC30. Japanese brand, consistent quality.
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Counterbore Drill
Product Overview: HSS Counterbore Drill DCBTA – JIS Series
【Product Features & Why We Recommend It】
- Japanese Brand JIS Standard Specification: Originating from a professional Japanese cutting tool brand with JIS (Japanese Industrial Standard) compliant design and rigorous quality control — recommended for users requiring counterbore holes conforming to Japanese screw specifications or with high demands on standardized dimensional consistency.
- Counterbore / Countersink One-Piece Forming Design: Features a counterbore drill dedicated geometry — recommended for single-pass precision forming of screw counterbores and countersunk holes, effectively ensuring concentricity between the counterbore seating surface and hole position while reducing machining steps.
- Large-Diameter Extended Coverage: Available up to a maximum diameter of 29mm — extending beyond the standard DCB series (maximum 20mm) to cover larger hole diameters, recommended for machining applications requiring larger screw size counterbore holes, covering forming needs from medium to large screw hole sizes within a single series.
- Simultaneous Drilling and Forming: Specially designed to complete both the bottom hole drilling and counterbore seating surface forming in a single operation — recommended for high-efficiency screw hole machining applications, reducing tool changes and improving overall machining efficiency.
- 14 Specification Precise Coverage: Available in diameter 6.5–29mm, flute length 9–37mm, and overall length 60–130mm across 14 specifications — recommended for flexible selection based on JIS screw specifications and workpiece hole diameter requirements.
【Machining Applications & Uses】
- Primary Use: JIS specification screw counterbore one-piece forming, countersunk screw hole precision machining, and simultaneous large-diameter counterbore seating surface and pilot hole drilling.
- Recommended Work Materials:
- P-Class (Carbon Steel / Alloy Steel): Structural steel, carbon steel, and alloy steel — recommended for hardness below HRC30, where the JIS specification counterbore drill geometry delivers stable one-piece forming cutting performance.
- N-Class (Non-Ferrous Metals): Aluminum alloys, pure copper, brass, and other non-ferrous metals — use of appropriate cutting fluid is recommended to ensure smooth chip evacuation and seat surface quality during large-diameter counterbore forming.
