RUKO KEB-HSS Mod.55 39.0 mm Annular Cutter with Weldon Shank

Professional metalworkers rely on this RUKO annular cutter when they need to produce clean, accurate 39 mm holes in steel plates, beams, or pipes. The core drilling method removes a solid slug, saving time and power compared to twist drills. It is ideal for use in magnetic drilling machines or pillar drills equipped with a Weldon chuck.

Key specifications

• Cutting diameter: 39.0 mm
• Cutting depth: 55 mm
• Material: HSS-XE high-speed steel
• Shank type: Weldon 19 mm (3/4")
• Application: Steel, stainless steel, cast iron, non-ferrous metals
• Maximum tensile strength: 900 N/mm²
• Cooling: External recommended
• Pilot pin: Required (specific to cutting depth)

Why choose it

The HSS-XE steel construction delivers long tool life and consistent performance in demanding industrial environments. Multi-tooth geometry ensures smooth cutting and efficient chip evacuation. The bright ground finish reduces friction and improves durability.

Ideal use cases

• Creating large diameter holes in structural steel
• Drilling through stainless steel fabrications
• Preparing pipe and tube for welding or bolting
• Maintenance and repair in heavy machinery

Good to know

This cutter belongs to the Mod.55 series, offering a 55 mm cutting depth. It requires a compatible pilot pin and external cooling for optimal results. The Weldon shank ensures secure clamping and accurate centering in magnetic drills.