Dewalt DX3721 Laser Blades 115mm (4.5") - Segmented Blade / Concrete - D115XBS22.2

Diameter: 115 mm (4.5 inches); segmented edge; max RPM: 5000; steel-backed alloy construction; dust extraction port; designed for concrete and reinforced concrete cutting; part number D115XBS22.2.

The segmented edge helps dissipate heat, reduces chipping and binding, and allows for faster dust removal. This generally results in smoother cuts and less wear on the blade when cutting hard materials like reinforced concrete.

Power off and unplug the saw, enable the tool-less blade change system, remove the old blade if present, align the new blade with the arbor (matching the rotation direction), secure it, and ensure the blade guard is properly re-attached before use.

This blade is designed for 115 mm blades and is specified for use with the Dewalt DX3721 laser saw. Check your saw’s arbor size and RPM rating to ensure compatibility before use with other models.

It's optimized for concrete and reinforced concrete. It can handle masonry-related materials encountered in renovations, but it is not intended for steel, tile, or other non-concrete materials.

Maintain a steady feed rate without forcing the blade, allow for cooling during long cuts, use the dust extraction port to keep the cut line clear, and avoid cutting through extremely hard inclusions that could cause binding or heat buildup.

Wear appropriate PPE (eye protection, hearing protection, gloves, and a dust mask), use the machine’s guards, ensure the workpiece is securely clamped, and connect a dust extraction system if available to minimize airborne dust during cutting.

Compared to other 115 mm segmented concrete blades on Fepy.com, the Dewalt DX3721 offers a robust steel-backed alloy construction, a dust extraction port for cleaner cuts, and a max RPM of 5000 for smooth performance. Alternatives from Makita or Bosch in the same size range may offer similar specs with variations in coating, durability, and price, so consider your needs for cutting speed, dust management, and compatibility with your saw.

Renovations involving concrete cutting, floor or wall openings, channeling for plumbing or electrical work, and any project requiring reinforced concrete cuts where a reliable, fast blade is beneficial.

Look for signs such as excessive chipping, glazing, missing segments, discoloration from overheating, or a noticeable drop in cutting efficiency. If you notice any abnormal vibration or wandering cuts, inspect and replace if needed.

For a 115 mm segmented concrete blade with a dust port and a robust construction, the Dewalt DX3721 typically offers solid durability and efficient performance in reinforced concrete applications. When comparing value, consider blade life, cut quality, dust management, and compatibility with your saw—sometimes a slightly higher upfront cost yields longer life and fewer replacements over time.