The Marcrist BF850 Silentmax Diamond Blade is up to 16 times quieter than a standard diamond blade. It cuts paving slabs, reinforced concrete, granite, brick, roof tiles and more. Available from 115mm to 350mm.
Size
Price
QTY
115mm
£33.00£39.60
125mm
£36.00£43.20
230mm
£65.00£78.00
300mm
£105.00£126.00
350mm
£119.00£142.80
The Marcrist BF850 Silentmax Diamond Blade is one of the quietest cutting blades available for angle grinders and disc cutters. Declared ‘State of the Art’ by noise specialists, the BF850 uses Marcrist’s patented SilentMAX technology to reduce operational noise by up to 16 times compared to a standard diamond blade. For anyone working regularly with disc cutters on site, that is a meaningful difference both for operator welfare and for compliance with noise exposure regulations.
The noise reduction comes from the blade’s construction. The BF850 uses a hardened, high tensile steel core reinforced with two additional armour plates. This combination dampens blade vibration and absorbs the harmonic resonance that makes standard diamond blades so loud. The result is a blade that cuts smoothly and quietly without sacrificing speed or accuracy. Vibration is also reduced, which eases fatigue during extended cutting sessions.
What the Marcrist BF850 Silentmax Cuts
The BF850 is designed for general construction and groundworks cutting across a wide range of building materials. It handles paving slabs, reinforced concrete, granite, natural stone, brick, breeze block, roof tiles, engineering brick, black pavers and standard concrete without needing to swap blades between materials. This makes the BF850 a practical choice for groundworkers, landscapers and builders who regularly move between different substrates on the same job.
Available in 115mm, 125mm, 230mm, 300mm and 350mm sizes, the BF850 suits a range of machines from small angle grinders through to larger floor saws and disc cutters. Choose the size that matches your tool’s arbor and guard specification.
Noise, Vibration and Legal Compliance
The Control of Noise at Work Regulations 2005 sets clear exposure limits for workers, and cutting with a disc cutter is one of the louder operations on a construction site. Using a quieter blade like the Marcrist BF850 Silentmax is one practical way to reduce daily noise exposure at source, which is the preferred approach under the regulations rather than relying solely on hearing protection. For plant hire companies and contractors with employed workers, this matters both for duty of care and for avoiding enforcement action.
The BF850 won the Hire Awards of Excellence in 2013, which reflects its standing in the tool hire sector where blades need to perform reliably across varied users and materials. Marcrist backs every BF850 with a 30-day no quibble guarantee, so if the blade does not perform as expected you have a clear route back.
For any contractor who cuts regularly through hard building materials and needs to manage noise exposure without slowing the job down, the Marcrist BF850 Silentmax Diamond Blade is a well-engineered solution that earns its place in the tool bag.
Pro Tip: When using the BF850 on reinforced concrete, keep the blade moving at a steady pace rather than forcing it through the diamond segments last significantly longer when cutting speed is consistent rather than variable.
The Marcrist BF850 Silentmax Diamond Blade is used wherever disc cutters and angle grinders are employed to cut hard construction materials. Groundworkers reach for it when cutting paving slabs and black pavers on driveway and landscaping jobs. Builders use it for breeze block, brick and concrete work during construction and demolition. Roofers find it suitable for cutting roof tiles to shape. It also handles reinforced concrete, granite and natural stone, making it a practical all-round blade for mixed-material jobs on site.
Best For
Reinforced concrete cutting
Paving slab and black paver work
Brick and breeze block
Roof tile cutting
Granite and natural stone
Engineering brick
Low-noise cutting compliance on site
Compatible With
115mm angle grinders
125mm angle grinders
230mm angle grinders
300mm disc cutters
350mm disc cutters and floor saws
Key Features
Up to 16 times quieter than a standard diamond blade
Patented SilentMAX technology
Hardened high tensile steel core
Two reinforcing armour plates
Reduced vibration during cutting
Hire Awards of Excellence 2013 winner
30-day Marcrist no quibble guarantee
Not suitable for: The BF850 is not designed for wet cutting applications or for use on metals. For metal cutting, a dedicated metal cutting disc is required.
Fit the Marcrist BF850 Silentmax to the appropriate machine for the blade size selected, ensuring the arbor size matches and the blade guard is correctly positioned. Always check the blade is rated at or above the maximum RPM of your machine before starting.
Begin cutting at a steady, controlled pace. Allow the diamond segments to do the work rather than forcing the blade through the material. Keeping a consistent forward speed reduces segment wear and helps maintain cut accuracy. On harder materials like granite or reinforced concrete, shorter passes with light pressure give better results than a single heavy cut.
Select the correct BF850 size to match your angle grinder or disc cutter.
Confirm the blade's maximum RPM rating meets or exceeds your machine's rated speed.
Fit the blade securely, ensuring the arbor flange is clean and the locking nut is fully tightened.
Position the blade guard correctly before switching the machine on.
Mark your cut line clearly on the material and begin cutting at a steady, controlled pace.
Allow the blade to cut freely avoid forcing it through the material.
On reinforced concrete or granite, use shorter passes at light pressure rather than a single deep cut.
After cutting, allow the blade to come to a complete stop before setting the machine down or changing blades.
How much quieter is the Marcrist BF850 Silentmax compared to a standard diamond blade?
Marcrist's testing shows the BF850 is up to 16 times quieter than a conventional diamond blade. This is achieved through the patented SilentMAX core construction, which uses a hardened high tensile steel body reinforced with two additional armour plates to damp vibration and reduce blade resonance during cutting.
What materials can the BF850 cut?
The BF850 is designed for general construction materials including paving slabs, reinforced concrete, granite, natural stone, brick, breeze block, roof tiles, engineering brick, black pavers and standard concrete. It is not suitable for metal cutting.
Which sizes are available and what machines do they fit?
The BF850 is available in 115mm, 125mm, 230mm, 300mm and 350mm. The smaller sizes suit standard angle grinders, while the 300mm and 350mm blades are intended for disc cutters and floor saws. Always check the arbor bore size and maximum RPM rating match your machine before fitting.
The Marcrist BF850 Silentmax Diamond Blade is built around a hardened, high tensile steel core with two integrated reinforcing plates that form the basis of the patented SilentMAX noise reduction system. The combination of core materials, armour plating and a purpose-designed diamond segment layout works together to reduce both airborne noise and transmitted vibration. The blade is manufactured to operate across multiple hard construction materials in dry cutting conditions.
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