BDS HSSVarioPLUS kierrekaira 18 mm leikkaussyvyys 55 mm Weldon-varsi (KBL-VP018)

When drilling large-diameter holes in steel or stainless steel, standard twist drills often struggle with heat buildup, wandering, and premature wear. The BDS HSSVarioPLUS Core Drill Bit 18 mm solves this by removing only the periphery of the hole, leaving a solid core that ejects automatically. This annular cutter design drastically reduces cutting forces and heat, allowing faster drilling and longer tool life compared to conventional bits.

Who is it for

This core drill bit is built for metalworking professionals and serious fabricators who use magnetic core drilling machines. It is ideal for structural steel erectors, pipe fitters, maintenance crews, and manufacturing plants that need clean, accurate 18 mm holes in steel plates, beams, or pipes. If you frequently drill thick metal sections and demand consistent precision, this bit is a reliable choice.

Main features

• High-speed steel with VarioPLUS coating for enhanced wear resistance and heat dissipation
• Precision ground cutting edges deliver clean, burr-free holes
• Weldon shank (19 mm / 3/4 inch) for secure, tool-free mounting in magnetic drills
• Automatic core ejection after each cut for uninterrupted workflow
• Optimized for steel, stainless steel, cast iron, and non-ferrous metals
• 55 mm cutting depth covers most structural steel thicknesses

Specifications

• Drill bit type: Core drill bit (annular cutter)
• Cutting diameter: 18 mm
• Cutting depth: 55 mm
• Shank type: Weldon shank, 19 mm (3/4 inch)
• Total length: 85 mm
• Material: HSS-VarioPLUS (high-speed steel)
• Number of cutting edges: 2
• Surface finish: Bright
• Standard: DIN 845
• Coolant: Internal/external recommended
• Compatibility: Magnetic core drilling machines

Tips

Always use cutting fluid or a coolant system to maximize tool life and hole quality. Ensure the workpiece is securely clamped, and start the drill at a moderate speed before increasing to the recommended feed rate. After each hole, clear chips from the cutting area to prevent re-cutting and overheating.