The Diablo 4" Diamond Continuous Rim Masonry Cut-Off Disc is a precision cutting disc engineered for clean, chip-free results in hard materials including granite, marble, porcelain, and tile. Designed for use with an angle grinder, this Diablo diamond wheel features an ultra-thin continuous rim that maintains constant contact with the work surface, delivering up to 60% smoother cuts compared to standard diamond cut-off discs. Whether you are wet cutting natural stone countertops or dry cutting ceramic tile installations, this disc combines industrial-grade diamonds with a hardened disc body to sustain cutting quality even in demanding, high-speed applications.

Key Features

• Superior quality diamond edge rim design delivers up to 60% smoother cuts versus standard diamond cut-off discs - resulting in chip-free cuts without burn marks, so finished edges require less rework
• Hardened disc body absorbs vibration and increases impact resistance - this means the disc stays stable under load, producing consistent, high-quality cuts in hardened stone and tile even in extreme applications
• Ultra-thin constant contact continuous turbo rim design - maintains steady contact across the cut line to deliver precise, accurate cuts at high rates of speed, reducing material waste
• Compatible with 7/8", 20mm, and 5/8" arbors - broad arbor compatibility means this disc fits the most common angle grinder configurations without requiring a separate adapter purchase
• Includes two bushings (20mm and 5/8") - adapters ship in the box so you can mount the disc immediately on different grinder spindle sizes
• Rated for dry and wet cutting - gives you flexibility to use the disc in both water-cooled tile saws and dry angle grinder setups across a variety of job site conditions
• Maximum RPM of 15,250 - high speed rating supports aggressive cutting in dense materials like granite and porcelain without exceeding safe operating limits
• 1.4mm kerf - the narrow kerf reduces material removed per pass, resulting in less chipping and cleaner cut edges on delicate tile and natural stone

Why This Product

• When working with fragile or high-value materials like marble and porcelain tile, the continuous rim design eliminates the segmented interruptions that cause chipping - giving you finished cuts that look professional without secondary grinding or polishing
• The disc's industrial-grade diamonds embedded in a hardened body mean it maintains cutting performance across extended use in tough materials like granite, rather than dulling quickly and requiring frequent disc changes
• With arbor compatibility across 7/8", 20mm, and 5/8" sizes - plus two included bushings - this disc works with the angle grinders most tradespeople already own, eliminating compatibility guesswork on the job site
• Support for both dry and wet cutting makes this a single, versatile solution for tile and natural stone work across different setups, from portable angle grinder use in the field to wet saw applications in a shop environment

Specifications

• Brand: Diablo
• Model Number: DMADC0400
• Diameter: 4"
• Arbor: 7/8", 20mm, 5/8"
• Kerf: 1.4mm
• Rim Design: Continuous
• Maximum RPM: 15,250
• Compatible Tools: Angle Grinder
• Compatible Materials: Granite, Marble, Porcelain, Tile
• Pack Quantity: 1

Approved Applications

• Tile and Natural Stone

What's Included

• 1x Diablo 4" Diamond Continuous Rim Masonry Cut-Off Disc (DMADC0400)
• 1x 20mm bushing
• 1x 5/8" bushing

Frequently Asked Questions

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

Yes. The Diablo DMADC0400 is rated for both dry and wet cutting, making it compatible with angle grinder dry-cut applications as well as wet cutting setups where water cooling is used to manage heat and dust during cutting of granite, marble, porcelain, and tile.

What arbor sizes is this disc compatible with?

This disc is compatible with 7/8", 20mm, and 5/8" arbors. Two bushings - a 20mm bushing and a 5/8" bushing - are included in the package, allowing you to adapt the disc to the correct spindle size for your angle grinder without purchasing additional hardware.

How much smoother does this disc cut compared to a standard diamond cut-off disc?

The continuous rim design on this Diablo diamond disc delivers up to 60% smoother cuts compared to standard diamond cut-off discs. The result is chip-free cuts without burn marks, which is especially valuable when cutting delicate finished materials like porcelain tile, marble, and granite.

What is the maximum safe operating speed for this disc?

The maximum rated RPM for this disc is 15,250 RPM. Always verify that your angle grinder's no-load RPM does not exceed this rating before use to ensure safe operation in compliance with the disc's specifications.