BDS τρυπάνι πυρήνα HSS 20 mm βάθος κοπής 30 mm στέλεχος Weldon (KBK-020)

Precision-ground from high-speed steel, this BDS core drill bit delivers a 20 mm cutting diameter with a 30 mm depth—ideal for clean, efficient holes in steel and cast iron using magnetic drilling machines.

Overview

The BDS KBK-020 is a standard-series HSS core drill bit engineered for metalworking professionals. Its Weldon shank (19 mm / 3/4 inch) ensures secure, wobble-free mounting on magnetic drills, while the two-flute spiral design promotes rapid chip evacuation and reduced heat buildup. The bright, uncoated finish offers excellent cutting performance on materials up to 700 N/mm² tensile strength, including steel, cast iron, and non-ferrous metals. External coolant supply is recommended to maximize tool life and hole quality.

What stands out

• High-speed steel construction for durability and sharpness retention
• Weldon shank for quick, tool-free bit changes on magnetic drills
• Ground flutes and cutting edges for precise, burr-free holes
• Spiral flute design optimizes chip flow in deep drilling
• Versatile across ferrous and non-ferrous metals

Technical details

• Drill bit type: Core drill bit
• Material: High-speed steel (HSS)
• Cutting diameter: 20.0 mm
• Cutting depth: 30 mm
• Shank type: Weldon
• Shank diameter: 19 mm (3/4 inch)
• Number of flutes: 2
• Surface finish: Bright (uncoated)
• Max. tensile strength: 700 N/mm²
• Coolant supply: External
• Compatibility: Magnetic drilling machines

Our verdict

A reliable, precision-ground core drill that pairs perfectly with magnetic drills. If you need consistent 20 mm holes in structural steel or plate, the KBK-020 is a solid workshop staple.