Adjustable Counterbore Drill Bit

Adjustable counterbore drill (with replaceable center drill)

Our "Premium Series" adjustable counterbore drills are specially designed for professional carpenters who pursue ultimate efficiency and durability. It combines precise adjustment, revolutionary replaceable center drill design and industry-leading ultra-long service life, making it your ideal choice for efficiently and accurately completing counterbore operations such as door hinge installation and furniture assembly. Every detail demonstrates our unremitting pursuit of outstanding quality.

Outstanding quality, durable:

Top-grade material: The key cutting parts (tool head/blade) are made of imported high-hardness and high-wear-resistant hard alloys (such as tungsten steel), which have a hardness far exceeding that of ordinary high-speed steel, strong impact resistance, and are less prone to chipping.

Precision manufacturing: The main structure is made of high-quality alloy steel, processed through precise CNC machining and special heat treatment techniques, ensuring strong overall rigidity, minimal deformation, smooth operation, reduced vibration, and extended service life of the drill bit and the equipment in use.

The innovative adjustment mechanism enables you to easily and precisely set the depth and diameter of the counterbore (depending on the specific model), meeting the requirements of different specifications of screws and workpieces.

Significant cost savings: When the center drill is worn or damaged, there is no need to replace the entire expensive counterbore drill bit! Just purchase an economical replacement center drill to immediately restore the best performance of the drill bit.

Please read the operation manual of the machine tool and the cutting tools before use.

It is strongly recommended to wear goggles, dust masks and hearing protection devices.

Make sure the cutting tools are securely installed and use them within the recommended rotational speed range.

Keep the work area tidy and avoid clutter from interfering.