The Diablo 4" Diamond Segmented Masonry Cut-Off Blade is engineered for professionals who demand consistent, high-speed cutting performance in concrete, concrete with rebar, brick, and cinder block. Designed for use with an angle grinder, this segmented diamond disc delivers up to 2X longer cutting life compared to standard diamond cut-off discs, making it a reliable choice for heavy masonry work, demolition, and renovation applications. Industrial-grade diamonds bonded to a hardened disc body ensure maximum performance even in the most demanding cutting environments.

Key Features

• Taller segments with superior quality diamonds and an ultra-durable bond to the disc body provide up to 2X longer cutting life - reducing blade change frequency and downtime on the job site.
• Hardened disc body absorbs vibration and increases impact resistance - delivering cleaner, more controlled cuts in hardened masonry materials and improving operator comfort during extended use.
• Optimized diamond segments and diamond distribution create constant diamond exposure - ensuring consistent cutting speed and peak performance in high-speed angle grinder applications.
• Compatible with 7/8", 20mm, and 5/8" arbors - offering broad tool compatibility so the blade fits a wide range of angle grinders without additional adapters.
• Includes two bushings (20mm and 5/8") - so the blade is ready to mount on multiple grinder configurations right out of the box.
• Rated for both dry and wet cutting - giving users the flexibility to work in varied site conditions without needing a separate blade for each method.
• Maximum RPM of 15,250 - matched to standard angle grinder operating speeds for safe, code-compliant use in high-speed cutting applications.
• 2.2mm kerf - a precise cut width that minimizes material waste while maintaining blade stability through the cut.

Why This Product

• Cuts through concrete with rebar, brick, and block - tackling the toughest mixed-material masonry tasks that would wear out standard diamond blades far more quickly.
• Up to 2X longer cutting life than standard diamond cut-off discs means fewer blade replacements, lower cost per cut, and more productive time on difficult masonry and concrete projects.
• Multi-arbor compatibility (7/8", 20mm, and 5/8") with included bushings makes this blade a versatile fit for the angle grinders already on your job site - no extra hardware required.
• Approved for both wet and dry cutting at up to 15,250 RPM - adapting to different project requirements and site conditions without compromising safety or cutting quality.

Specifications

• Brand: Diablo
• Manufacturer Part Number: DMADS0400
• Diameter: 4"
• Arbor: 7/8", 20mm, 5/8"
• Kerf: 2.2mm
• Rim Design: Segmented
• Maximum RPM: 15,250
• Compatible Tools: Angle Grinder
• Materials: Concrete; Concrete with Rebar; Brick/Block
• Pack Quantity: 1
• Category: Segmented Diamond Wheels

Approved Applications

• Concrete cutting - including slabs, pavers, and structural concrete
• Concrete with rebar - for demolition and renovation cuts through reinforced sections
• Brick and block - including standard brick, cinder block, and masonry block

What's Included

• 1x Diablo 4" Diamond Segmented Masonry Cut-Off Blade (DMADS0400)
• 20mm arbor bushing
• 5/8" arbor bushing

Frequently Asked Questions

Can this blade be used for both wet and dry cutting?

Yes. The Diablo DMADS0400 is approved for both wet and dry cutting applications, giving you the flexibility to adapt to different job site conditions and material types without needing a separate blade for each method.

What arbor sizes does this blade support?

This blade is compatible with 7/8", 20mm, and 5/8" arbors. Two bushings - one 20mm and one 5/8" - are included in the package so the blade can be mounted on a wide range of angle grinders right away.

How does this blade perform compared to standard diamond cut-off discs?

Diablo's segmented diamond cut-off blade delivers up to 2X longer cutting life versus standard diamond cut-off discs. This is achieved through taller segments with superior quality diamonds and an ultra-durable bond between the segments and the hardened disc body, maintaining consistent cutting performance over a longer service life.

What is the maximum safe operating speed for this blade?

The DMADS0400 has a maximum rated speed of 15,250 RPM. Always verify that your angle grinder does not exceed this rating before use, and follow all applicable safety guidelines when operating the blade at high speed.