Diamond cutting disc 3M EC-42.1 230×2.6×10×22.23 mm for concrete and masonry

3M EC-42.1 diamond cutting disc, size 230×2.6×10×22.23 mm, is designed for precise straight cutting of concrete and masonry. The disc fits standard angle grinders with a 22.23 mm bore and provides a diamond cutting edge engineered to remove material efficiently while maintaining stable performance on construction and renovation jobs. Its thin cutting width reduces chipping and enables accurate cuts in reinforced concrete, concrete blocks and paving.

Advantages

The diamond cutting edge offers consistent cutting speed and long abrasive life while minimising vibration during operation. A thin 2.6 mm kerf reduces material waste and allows for fast, straight cuts. The segmented or continuous rim design (depending on the specific EC-42.1 variant) provides effective cooling and debris clearance for sustained performance. Balanced construction improves safety and runout control on compatible angle grinders.

Suitable for

• Straight cutting of reinforced concrete
• Cutting concrete blocks and paving slabs
• On-site renovation and construction cutting tasks
• Angle grinder use for masonry and concrete

Key specifications

• Diameter: 230 mm
• Cutting thickness (kerf): 2.6 mm
• Segment height / rim width: 10 mm
• Arbor bore: 22.23 mm
• Intended material: concrete and masonry
• Mounting tool: standard angle grinder

How to use

Mount the disc on a compatible angle grinder with a 22.23 mm arbor, ensuring the flange and nut are properly tightened and the disc rotation direction matches the grinder’s arrow. Use appropriate personal protective equipment including eye protection, hearing protection and respiratory protection when cutting. Mark the cutting line, secure the material to prevent movement, and perform steady, controlled passes without forcing the disc. Allow the diamond edge to do the cutting; moderate pressure and consistent feed deliver the best balance of speed and disc life.

Usage recommendations

Operate the disc within the grinder’s rated RPM and follow the tool manufacturer’s safety instructions. For extended life, avoid overheating by using intermittent cutting and allowing the disc to cool. Replace the disc if it shows signs of severe wear, uneven runout, or damage to the diamond segments or rim.