Description
The Yato knotted cup brush M14 125 mm stainless steel is a heavy-duty cleaning accessory for angle grinders. The knotted wire, made of stainless steel, forms a stiff, long-lasting brushing surface that bites efficiently into rust, old paint, casting residues and weld spatter. The cup shape gives a large contact surface and even material removal, even on large flat surfaces.
The M14 threaded fitting is compatible with most 115–125 mm angle grinders sold in Europe. The stainless steel material prevents premature corrosion of the bristles in damp and outdoor conditions, which extends its life and reduces the risk of iron contamination on stainless substrates. The knotted pack holds together even under heavy load, which reduces wire breakage and vibration compared with straight twisted wires.
The cup brush is suitable for preparation before painting, coating or welding and for maintenance of structures, railings, machines and steel sheets. When used correctly, the brush speeds up work steps, lowers the consumption of abrasives and produces a uniform bonding surface for the next treatments.
Intended use:
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Removing rust and paint from steel surfaces: Knotted wire bites into firmly adhering corrosion and multi-layer paints. The cup shape keeps contact even and reduces “lunges”, so fewer deep grooves are left in the base material than with coarse grinding discs. This improves primer adhesion and shortens the total preparation time.
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Removing weld spatter and casting residues: Knotted stainless steel wire withstands point loads and heat better than organic abrasive products. It removes slag, burrs and casting skins quickly without excessive material removal from the base surface, which is important for keeping dimensional accuracy.
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Maintenance and cleaning of structures in outdoor conditions: Stainless wire tolerates moisture and salts, so the brush is suitable for bridge railings, stairs, tanks and outdoor steel structures. The lower corrosion risk from particles left by the brush reduces the formation of new rust spots.
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Keying the surface before bonding/coating: Mechanical keying creates a uniform microstructure that improves mechanical adhesion without heavy material removal. An even roughness also makes it easier to get coatings of even thickness.
Features:
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Diameter: 125 mm – Wide coverage for fast cleaning and preparation.
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Fixing: M14 – Standard thread for most angle grinders, quick fitting.
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Bristle material: Stainless steel (RST), knotted wire – High aggressiveness, long life and little wire breakage.
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Structure: Cup – Stable, even contact; controlled material removal on flat surfaces and edges.
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Suitability: Rust, paint, slag, burrs – For preparation before painting/coating and for maintenance.
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Machine: Angle grinder (115–125 mm class) – Good control and visibility of the workpiece.
Yato knotted cup brush stainless steel: instructions for use:
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Fitting: Disconnect the angle grinder from the power supply. Fit the brush to the M14 thread and tighten according to the manufacturer’s instructions. Check the guard.
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Starting: Try the brush briefly without load and make sure there is no imbalance or abnormal vibration.
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Working: Keep a light/weighted contact and let the knotted wire do the work. Make even sweeps; avoid stopping at one point to minimise heating.
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Monitoring: Stop regularly, remove loose material and check for wear. Replace the brush if the wire has shortened unevenly or the cup is damaged.
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Finishing and maintenance: Clean off dust and swarf; store in a dry place protected from corrosion.
Warnings:
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Always wear safety glasses/a visor, protective gloves, ear defenders and a respirator suited to the dust level.
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Do not exceed the speed permitted by the machine manufacturer for this brush size.
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Do not use a damaged or badly unbalanced brush.
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Keep flammable substances away from the work area; sparks can come from the workpiece.
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Fit only to compatible angle grinders and always use a guard.
Frequently asked questions (FAQ):
Why choose knotted stainless steel wire instead of nylon or steel wire?
Stainless steel resists corrosion and does not easily leave residues that rust; knotted wire is stiff and aggressive for heavy cleaning. Nylon is gentler, for soft surfaces.
Can I use the brush on stainless steel?
Yes, stainless steel wire reduces the risk of iron contamination. Clean the surface after use and avoid cross-contamination with other tools.
Is the brush suitable for aluminium?
Yes for light oxide removal, but avoid excessive pressure and heat build-up so that the surface does not “close up” or get deeply scratched.
When is it worth replacing the brush?
When the knots have clearly shortened unevenly, a lot of wire has broken off or the cup shows visible damage/distortion.
Recycling instructions:
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Packaging: Plastic packaging → plastic collection.
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Product: Metal cup and stainless steel wire → metal collection; if sorting is not possible, follow local rules.
