MAX Flat Stone Cutting Disc - Concrete Brick and Roof Tile Abrasive Wheel

MAX Flat Stone Cutting Disc - Concrete Brick and Roof Tile Abrasive Wheel

The MAX Flat Stone Cutting Disc is a Type F41 C30SBF silicon carbide cut-off wheel designed for fast, accurate cutting of natural stone, concrete, brick, and roof tiles on angle grinders and cut-off machines. Unlike aluminium oxide discs, which are formulated for metal cutting, silicon carbide abrasive is specifically suited to masonry and stone materials, delivering cleaner cuts with less chipping and reduced vibration transfer to the operator. For groundworkers, bricklayers, roofers, and civil engineers who need a reliable stone cutting disc across a range of masonry materials, this disc covers the full spread of common site applications from 100mm detail work to 300mm large-section cutting.

Why Choose the MAX Flat Stone Cutting Disc

• C30SBF silicon carbide abrasive: silicon carbide is harder and sharper than aluminium oxide on masonry materials, cutting through concrete, brick, and natural stone with less resistance and less heat build-up at the cut face than a standard aluminium oxide disc would generate.

• Vibration absorption during cutting: the C30SBF bond formulation dampens cutting vibration more effectively than harder abrasive bonds, reducing operator fatigue on extended cutting work and improving cut line accuracy on brittle materials like roof tiles and natural stone.

• Extended disc life on tough masonry: the bond density and grain specification are calibrated to resist the rapid wear that softer abrasive grades experience on hard concrete and dense natural stone, delivering more cuts per disc on demanding materials.

• Five size variants from 100mm to 300mm: the range covers everything from close-detail cutting on individual bricks and tiles with a 100mm grinder to cutting concrete blocks and stone sections with a 300mm cut-off machine, with bore sizes matched to standard professional tool fitments throughout.

• OSA and EN 12413 compliance: the disc meets both the Organisation for the Safety of Abrasives standards and the EN 12413 harmonised European standard, giving procurement teams and site managers a dual compliance reference for risk assessment documentation.

• 80 m/s peripheral speed rating across all variants: consistent speed rating across the range simplifies tool and disc matching on sites where multiple grinder sizes are in use at the same time.

• Made in Italy to European quality standards: manufactured under controlled production conditions with ISO 6103 unbalance testing and ISO 13942 run-out tolerance control on every variant.

What's Included

• One MAX Flat Stone Cutting Disc in the selected size variant (100mm, 115mm, 125mm, 230mm, or 300mm)

 Specifications

SIZE & PERFORMANCE

Compatibility

Who Is This For?

The MAX Flat Stone Cutting Disc is aimed at groundworkers, bricklayers, roofers, stonemasons, civil engineers, and general construction trades who regularly cut masonry materials on site. It suits the operative cutting individual bricks and roof tiles with a 115mm or 125mm angle grinder, and the contractor using a 230mm or 300mm cut-off machine for cutting concrete blocks, kerb stones, and natural stone sections. This is a professional specification disc for site use across a range of masonry materials, not a disc designed for occasional light cutting.

Typical Applications

• Cutting concrete blocks, kerb stones, and paving slabs to length on groundworks and civils projects

• Cutting bricks and engineering bricks to size on masonry and brickwork contracts

• Cutting natural stone, sandstone, and limestone for landscaping, walling, and architectural stonework

• Cutting roof tiles, including clay and concrete variants, during roofing installations and repairs

• Cutting concrete pipe sections and drainage products during civils and utilities work

• Cutting render and plaster during refurbishment and adaptation work on masonry structures

• Trimming concrete and masonry blocks during formwork stripping and slab edge preparation

How to Use

1. Select the correct disc variant for your angle grinder or cut-off machine, confirming the bore size matches your tool's arbor and the tool's maximum RPM does not exceed the disc's rated operating speed for the selected variant.

2. Fit the disc with the correct guard in place. Ensure the flanges seat flat against both disc faces and the locking nut is tightened to the tool manufacturer's specification.

3. Inspect the disc visually before use for chips, cracks, or delamination. Do not use a disc showing any sign of damage.

4. Run the disc at full operating speed for at least 30 seconds before making contact with the workpiece, observing from the side.

5. Mark the cut line clearly on the masonry surface before cutting. Silicon carbide discs cut accurately on brittle materials but do not self-correct if the cut line drifts.

6. Apply steady, consistent forward pressure along the cut line. Do not force the disc into hard concrete or dense stone. Let the abrasive do the work.

7. On thick concrete sections, make a shallow scoring cut first to establish the cut line, then deepen progressively rather than attempting a full-depth cut in a single pass.

8. Allow the disc to cool between cuts on hard or dense materials. Do not quench a hot disc with water.

9. After use, remove the disc from the tool and store flat in a dry environment away from impact risk.

Safety and Maintenance

Safety during use:

• Eye protection is mandatory: use approved safety goggles or a full face shield to EN 166. Stone and masonry cutting generates high-velocity fragments and abrasive dust across a wide arc.

• Respiratory protection is critical: cutting concrete, brick, and natural stone generates respirable silica dust, which is classified as a serious long-term respiratory hazard under COSHH. Wear a minimum FFP3 mask to EN 149 for all masonry cutting operations. Where cutting is sustained or in an enclosed space, powered air-purifying respirator (PAPR) protection should be considered.

• Wear cut-resistant gloves to EN 388 for disc handling and fitting, and during cutting where hand proximity to the work is unavoidable.

• Hearing protection to EN 352 is required. Angle grinders and cut-off machines operating on masonry consistently exceed 85dB(A).

• Never exceed the maximum operating RPM for the selected disc variant.

• Do not use this disc on metal. Silicon carbide abrasive is not formulated for steel cutting and will wear rapidly and unpredictably on metal surfaces.

• The Abrasive Wheels Regulations 1970, as incorporated into PUWER 1998, require that abrasive wheels are only mounted and operated by trained and appointed persons.

After use and storage:

• Inspect the disc after each use for chips, edge damage, or delamination of the reinforcement layers. Masonry cutting is harder on disc edges than metal cutting due to the abrasive and brittle nature of stone and concrete.

• Store discs flat in a dry environment at a stable temperature, away from moisture, impact, and vibration. Silicon carbide discs are more susceptible to moisture degradation of the bond than metal cutting discs.

• Do not stack heavy objects on top of stored discs.

• Dispose of worn or damaged discs as general factory waste in line with site waste management procedures.

Frequently Asked Questions

Q: Why is a silicon carbide disc better than an aluminium oxide disc for cutting stone and masonry?

 A: Silicon carbide is a harder, sharper abrasive than aluminium oxide and fractures more readily under load, which continuously exposes fresh cutting edges on brittle masonry materials. Aluminium oxide is optimised for metal cutting and wears rapidly on stone and concrete without delivering an efficient cut.

Q: What does OSA compliance mean and why does it matter?

 A: OSA stands for the Organisation for the Safety of Abrasives, an international body that sets safety standards for bonded and coated abrasive products. OSA compliance means the disc has been independently verified against rigorous safety and performance criteria beyond the minimum manufacturing requirements. On UK sites where procurement teams require documented product compliance, OSA certification provides an additional reference alongside EN 12413.

Q: What does EN 12413 mean and why does it matter on a UK site?

 A: EN 12413 is the harmonised standard for bonded abrasive products covering dimensional accuracy, maximum operating speed, and structural integrity. Specifying EN 12413 certified discs supports compliance with the Abrasive Wheels Regulations under PUWER 1998 and strengthens your risk assessment documentation.

Q: Is silica dust a risk when using this disc on concrete and brick?

 A: Yes. Cutting concrete, brick, sandstone, and many natural stones generates respirable crystalline silica dust, which is classified as a serious long-term lung hazard under COSHH regulations. The Control of Substances Hazardous to Health Regulations 2002 require employers to assess and control silica dust exposure on site. FFP3 respiratory protection is the minimum requirement for sustained masonry cutting, and wet cutting or on-tool extraction should be considered for high-exposure tasks.

Q: Can this disc cut reinforced concrete?

 A: The C30SBF disc will cut through the concrete matrix in reinforced sections, but the embedded steel reinforcement bars will damage or destroy the disc rapidly. For cutting reinforced concrete, a diamond blade rated for reinforced concrete is the correct tool. The MAX Flat Stone Cutting Disc is designed for unreinforced masonry, brick, natural stone, and concrete block work.

Q: What is the difference between the 115mm and 125mm variants in practice?

A: The 115mm variant is 2.5mm thick whilst the 125mm is 3.0mm thick, which gives the 125mm disc slightly better longevity on dense materials. Both use a 22mm bore and are compatible with standard 115mm and 125mm angle grinders respectively. Choose the variant that matches your tool's guard and flange configuration.

Q: Can I use this disc wet to reduce dust?

 A: This disc is designed for dry cutting operations. The resinoid bond is not rated for wet cutting and prolonged water exposure degrades bond integrity. For dust suppression on sustained masonry cutting, on-tool extraction or a water suppression attachment compatible with your angle grinder is the correct approach, keeping the disc itself dry during operation.

Q: How do I get a cleaner cut on roof tiles without chipping?

A: Score the cut line lightly on the first pass at low forward pressure, then deepen progressively on subsequent passes. Forcing the disc into a brittle tile on the first pass causes the material to fracture ahead of the cut line. Keeping the disc speed consistent throughout and avoiding lateral movement in the cut also reduces chipping significantly.

Q: Why should I order from CMT Group rather than a general builders merchant?

A: CMT Group has supplied construction sites across the UK since 2010, with a fleet of over 100 FORS Silver accredited vehicles covering 90% of the UK mainland. Orders placed online by 7pm qualify for next working day delivery, and a VIP dedicated delivery service dispatched within 30 minutes is available UK-wide for urgent site requirements. CMT's EDGE procurement portal gives construction buyers agreed contract pricing, spending controls, and live delivery tracking with What3Words integration.