The Diablo 4-1/2 in. Diamond Turbo Masonry Cut-Off Disc is engineered for professionals who demand lasting performance when cutting through concrete, brick, and block. Diablo combines industrial-grade diamonds with a hardened disc body to deliver up to 2X longer cutting life compared to standard diamond cut-off discs, making this turbo-rim wheel a go-to choice for angle grinder users tackling tough masonry and hardened materials in both dry and wet cutting conditions.

Key Features

• Superior quality diamond edge rim design with an ultra-durable bond to the disc body - delivers up to 2X longer life so you replace discs less often and stay productive on the job
• Ultra-thin constant contact continuous turbo rim design - provides precise cuts at high rates of speed, reducing material waste and improving cut accuracy in concrete and masonry
• Hardened disc body absorbs vibration and increases impact resistance - delivers superior quality cuts in hardened materials even in extreme applications, protecting both the disc and the operator
• Compatible with 7/8 in., 20mm, and 5/8 in. arbors - fits a wide range of angle grinders so you can swap this disc onto existing tools without adapters
• Includes two bushings (20mm and 5/8 in.) - adds versatility right out of the package, reducing the need to source additional hardware
• Rated for dry and wet cutting - gives you flexibility to use the disc with or without water cooling depending on the job site setup
• Maximum RPM of 13,280 - matches the speed capabilities of standard 4-1/2 in. angle grinders for safe, high-performance operation
• 0.08 in. kerf - minimizes material removal per cut, helping to maintain structural integrity in block and brick work

Why This Product

• Professionals cutting concrete, brick, or cinder block repeatedly benefit from the 2X longer cutting life, which means fewer disc changes, less downtime, and lower cost per cut over the course of a project.
• The continuous turbo rim design combines the speed advantages of a segmented disc with the smooth, chip-resistant finish of a continuous rim - making it a practical choice for masonry cuts where edge quality matters.
• Three arbor sizes supported (7/8 in., 20mm, and 5/8 in.) with two bushings included means this disc integrates with a broad range of existing angle grinders without requiring additional purchases.
• Wet and dry cutting capability makes this disc suitable for controlled indoor slab work as well as outdoor masonry cutting, reducing the need to stock multiple specialized discs for different job conditions.

Specifications

• Brand: Diablo
• Manufacturer Part Number: DMADT0450
• Product Group: Diamond Wheels
• Category: Turbo
• Diameter: 4-1/2 in.
• Arbor: 7/8 in., 20mm, 5/8 in.
• Kerf: 0.08 in.
• Rim Design: Turbo
• Maximum RPM: 13,280
• Compatible Tools: Angle Grinder
• Materials: Concrete; Brick/Block; Masonry
• Pack Quantity: 1

Approved Applications

• Concrete
• Brick
• Block

What's Included

• 1x Diablo 4-1/2 in. Diamond Turbo Masonry Cut-Off Disc (DMADT0450)
• 1x 20mm bushing
• 1x 5/8 in. bushing

Frequently Asked Questions

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

Yes. The Diablo DMADT0450 is rated for both dry and wet cutting, giving you flexibility depending on your job site requirements. Whether you are cutting brick dry on an outdoor patio or using water cooling on an interior concrete slab, this disc is designed to handle both conditions.

What angle grinder arbor sizes does this disc fit?

This disc is compatible with 7/8 in., 20mm, and 5/8 in. arbors. Two bushings - 20mm and 5/8 in. - are included in the package, so you can fit the disc to most standard 4-1/2 in. angle grinders right away without purchasing separate adapters.

How does the turbo rim design differ from a standard diamond cut-off disc?

The continuous turbo rim provides ultra-thin constant contact with the material being cut, which delivers precise cuts at high rates of speed. Combined with the ultra-durable bond between the diamond edge and the disc body, the turbo rim design achieves up to 2X longer cutting life versus standard diamond cut-off discs.

What is the maximum safe operating speed for this disc?

The Diablo DMADT0450 has a maximum rated speed of 13,280 RPM. Always verify that your angle grinder's rated RPM does not exceed this limit before use to ensure safe operation.