BDS HSS Standard Annular Cutter 21.0mm Cutting Diameter, 30mm Cutting Depth, Weldon Shank (KBK-021)

Core drilling in steel and non-ferrous metals demands a cutter that combines precision, durability, and clean chip evacuation. The BDS HSS Standard Annular Cutter KBK-021 delivers exactly that, with a 21.0 mm cutting diameter and 30 mm cutting depth. Its high-speed steel body and Weldon shank make it a reliable choice for magnetic core drilling machines and drill presses in industrial and professional settings.

Advantages

The bright, uncoated HSS construction provides excellent wear resistance and maintains sharpness over repeated use. Four flutes ensure efficient chip removal, reducing heat buildup and extending tool life. The Weldon shank (19.05 mm / 3/4 inch) guarantees secure, concentric mounting, minimizing vibration and improving hole quality. Manufactured to DIN 845 standards, this cutter offers consistent performance and dimensional accuracy.

Suitable for

• Magnetic core drilling machines with Weldon arbor
• Drill presses equipped with Weldon tool holders
• Industrial fabrication and metalworking shops
• Professional maintenance and repair tasks
• Creating through-holes in steel plates, beams, and pipes

Key specifications

• Cutting diameter: 21.0 mm
• Cutting depth: 30 mm
• Shank type: Weldon (19.05 mm / 3/4 inch)
• Material: High-speed steel (HSS)
• Number of flutes: 4
• Finish: Bright (uncoated)
• Overall length: 65 mm
• Manufacturing standard: DIN 845
• Core ejector pin required (sold separately)

Recommendations

For best results, use with a compatible core ejector pin and appropriate cutting fluid. Ensure the Weldon shank is fully seated and tightened. This cutter is ideal for professionals seeking a balance of performance and cost-effectiveness in standard core drilling applications.