RUKO LOS-BiM-140mm Bi-Metal Hole Saw 140 mm

Professional tradespeople and serious DIYers rely on this 140 mm bi-metal hole saw for clean, fast cuts in wood, plastic, plasterboard, non-ferrous metals, and thin-gauge mild or stainless steel. Its welded bi-metal construction combines HSS teeth with an alloy steel body, delivering durability and heat resistance even under continuous use.

Key specifications

• Diameter: 140 mm
• Cutting depth: 40 mm
• Material: Bi-metal (HSS teeth, alloy steel body)
• Tooth design: Variable pitch
• Arbor thread: 5/8"-18 UNF
• Max RPM: 800 (wood), 150 (steel)
• Slug ejection: Side slots

Why choose it

The variable pitch tooth geometry reduces vibration and chatter, producing smooth, round holes with minimal tear-out. Side slots allow easy slug removal, saving time on repetitive jobs. The HSS teeth are hardened to 62–67 HRC for long cutting life, and the corrosion-resistant finish keeps the saw in good condition.

Ideal use cases

• Cutting large holes for pipe penetrations in wood studs or drywall
• Making openings for downlights in plasterboard ceilings
• Drilling access holes in plastic enclosures or sheet metal
• Creating holes in thin stainless steel panels for vents or fittings

Good to know

This hole saw requires a separate arbor with a 5/8"-18 UNF thread. Use a suitable pilot drill and follow the recommended speed limits for the material to maximise tool life. Compatible with corded and cordless drills that provide sufficient torque.