RUKO VOB-3S-30 Weldon HSS-Co 11,0 mm kernboor

For metalworkers and maintenance crews using magnetic drilling machines, the RUKO VOB-3S-30 Weldon HSS-Co 11.0mm annular cutter delivers precise core drilling in steel, stainless steel, cast iron, and non-ferrous metals. Its 3 cutting edges and cobalt-alloyed high-speed steel construction handle materials up to 1000 N/mm² tensile strength with reliable chip evacuation and clean hole walls.

Key specifications

• Cutting diameter: 11.0 mm
• Cutting depth: 30 mm
• Shank type: Weldon shank, 19 mm (3/4 inch)
• Material: HSS-Co (high-speed steel with cobalt)
• Number of cutting edges: 3
• Overall length: 64 mm
• Finish: Bright (uncoated)
• Series: Ruko VOB-3S

Why choose it

The VOB-3S-30 combines a robust Weldon shank for secure clamping with a cobalt-enriched steel body that resists heat and wear. Its 3-edge geometry reduces cutting forces and improves roundness compared to 2-edge cutters, while the core drilling method removes less material than solid drilling, saving time and energy.

Ideal use cases

• Creating through-holes in structural steel plates
• Drilling stainless steel fabrications and tanks
• Machining cast iron components
• Site work with portable magnetic drills

Good to know

Coolant is recommended during operation to extend tool life and improve surface finish. The cutter is compatible with ejection pins for slug removal. Use on magnetic drilling machines or pillar drills with a suitable adapter.