The Marcrist BF850 is a 115mm super slim diamond blade with a 1.2mm cutting edge. High diamond concentration in the segments delivers fast, clean cuts through concrete, brick, tile, stone and board materials with noticeably less dust and waste.
The Marcrist BF850 Super Slim Multi Material Diamond Blade is a 115mm cutting disc designed for tradespeople who need speed, precision and reduced mess across a wide range of materials. With a cutting edge thickness of just 1.2mm, this diamond blade for concrete, tile and masonry cuts with roughly half the material waste of a standard blade. That thinner kerf also means less dust thrown into the air, which matters on any job where you are working in enclosed or finished spaces.
The BF850 achieves its fast cut rate through a high diamond concentration in the segments. More diamonds in contact with the material means the blade does not need to be forced through the cut. You let the blade do the work, and it moves through hard materials cleanly and quickly. This is particularly noticeable when cutting concrete or dense natural stone, where a lower-quality blade would bog down or generate excessive heat.
What Makes the Marcrist BF850 Stand Out
Marcrist has engineered several practical features into the BF850 that are worth understanding before you reach for any other 115mm disc. The armoured blade core adds structural integrity during hard cutting, reducing the risk of blade distortion under load. Self-cooling technology helps manage heat build-up during extended cuts, which extends blade life and keeps the cut consistent. The engineered core also contributes to what Marcrist calls semi-silent technology, meaning reduced vibration and noise compared with conventional segmented blades. On a long shift, that difference is noticeable in your hands and your ears.
The V-UHP fusion refers to the bonding process used to fuse the diamond segments to the blade core. A strong bond at the segment-to-core joint is critical for safety during high-speed cutting. The BF850’s armoured core and segment bonding are both designed to meet the demands of continuous professional use rather than occasional DIY work.
Diamond Blade Concrete and Multi Material Cutting in One Disc
One of the practical advantages of the BF850 is its genuine multi-material capability. A single blade that cuts concrete, brick, fibreboard, plasterboard, ceramic tiles, profiles, natural stone and sandstone removes the need to swap discs between tasks on a mixed job. Whether you are cutting openings in blockwork, trimming fibre cement board, or scribing tiles on site, the BF850 handles the transition without complaint. That said, the blade performs best when used at the correct speed for the material, so check your grinder’s RPM against the blade’s rated speed before starting.
The BF850 fits 115mm angle grinders with a standard 22mm bore, which covers most popular machines from Makita, DeWalt, Bosch and other common brands. At 1.2mm wide, the slim kerf makes it particularly well suited for accurate work where material removal needs to be kept to a minimum, such as cutting expansion joints, trimming tiles to fit, or making precise openings in rendered walls.
Pro Tip: When using the BF850 on dense concrete or natural stone, keep the blade moving steadily rather than pausing in the cut, as holding the blade stationary under load generates heat and shortens segment life faster than continuous cutting does.
The Marcrist BF850 is used across a wide range of trade applications where one blade needs to handle multiple materials on the same job. Groundworkers and bricklayers use it for cutting concrete blocks, engineering brick and sandstone. Tilers reach for it when they need a clean, thin cut on ceramic or porcelain. Drylining fixers use it on fibreboard and plasterboard where a thicker blade would cause unnecessary crumbling at the cut edge. It is also a practical choice for cutting profiles and composite materials on renovation and refurbishment jobs, where the material mix is unpredictable and swapping blades wastes time.
Best For
Cutting concrete and brick
Ceramic and porcelain tiles
Natural stone and sandstone
Fibreboard and plasterboard
Profiles and composite materials
Jobs requiring minimal dust and material waste
Compatible With
115mm angle grinders
22mm bore spindles
Makita, DeWalt, Bosch and most standard grinders
Key Specifications
Diameter: 115mm
Bore: 22mm
Cutting edge thickness: 1.2mm
High diamond concentration segments
Armoured blade core
Semi-silent technology
Self-cooling design
V-UHP segment fusion
Not suitable for: The BF850 is not suitable for wet cutting applications or use with water-cooled saws. It is also not recommended for cutting metals, glass, or hardwood.
Fit the Marcrist BF850 to a 115mm angle grinder, ensuring the bore seats correctly on the spindle and the blade guard is in place. Check the grinder's RPM rating does not exceed the blade's maximum speed before starting.
Apply steady, consistent forward pressure and keep the blade moving through the cut at a controlled pace. Avoid forcing the blade or pausing under load, as both habits generate heat and reduce segment life. For deep cuts in hard materials such as concrete or natural stone, make a series of shallow passes rather than attempting the full depth in one pass.
Confirm your angle grinder has a 115mm capacity and a 22mm spindle bore before fitting the blade
Check the grinder's no-load RPM against the maximum speed rating printed on the blade
Fit the BF850 securely, ensuring the blade guard is correctly positioned and the locking nut is tightened
Mark your cut line clearly on the material before starting
Begin cutting at a steady pace, applying consistent forward pressure without forcing the blade
For concrete, brick or stone, use shallow progressive passes rather than cutting the full depth in one go
Keep the blade moving continuously in the cut to prevent heat build-up at the segments
Allow the blade to cool naturally between extended cutting sessions on hard materials
Can the Marcrist BF850 be used on a standard angle grinder?
Yes. The BF850 has a 115mm diameter and a 22mm bore, which fits the spindle size used on most standard 115mm angle grinders from brands including Makita, DeWalt and Bosch. Always check that your grinder's RPM rating is compatible with the blade's maximum speed before use.
What is the advantage of the 1.2mm cutting edge compared with a standard diamond blade?
A 1.2mm kerf removes significantly less material per cut than a standard blade, which means less dust, less waste and a cleaner cut edge. On materials like tile or plasterboard this produces a neater finish. On harder materials like concrete it also means less resistance, so the blade moves through the cut faster with less effort from the grinder.
Is the BF850 suitable for dry cutting only, or can it be used wet?
The Marcrist BF850 is designed for dry cutting use. It is not suitable for wet cutting or use with water-cooled cutting equipment. The self-cooling technology in the blade is designed to manage heat during dry use, but it should not be used as a substitute for wet cutting on sustained deep cuts in very hard materials.
The Marcrist BF850 uses a high diamond concentration segment bonded to an armoured steel core via V-UHP fusion technology. The 1.2mm cutting edge reduces kerf width and material resistance, while the engineered core geometry contributes to reduced vibration and noise during operation. The self-cooling segment design helps dissipate heat during continuous dry cutting, extending segment life on hard abrasive materials including concrete and natural stone.
Brand
Marcrist
Model
BF850
Diameter
115mm
Bore
22mm
Cutting Edge Thickness
1.2mm
Application
Multi material: concrete, brick, tile, stone, fibreboard, plasterboard, sandstone
Core Type
Armoured engineered core
Segment Bonding
V-UHP fusion
Cooling
Self-cooling technology
Noise Reduction
Semi-silent technology
Box Quantity
1
Product Type
Multi Material Blades
Size
115mm x 22mm
Box Quantity
1
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