Yato M14 100 mm woven bristle cup brush

The Yato Cup Brush M14 100 mm Knotted Stainless Steel is a brush you attach to an angle grinder, designed for heavy-duty cleaning on metal surfaces for mechanical pre-treatment. The knotted stainless steel wire forms stiff bundles that bite into thick rust, flaking paint layers, and welding slag really effectively. The copper body stabilizes the contact and spreads the load evenly, so the work goes smoothly even on large surfaces.
The 100 mm diameter gives good coverage without messing up the control. This size works great for sheet metal, profiles, and seam areas where you need quick material removal and even roughness before primer or coating. The M14 thread fits common 115-125 mm class angle grinders.
Using INOX wire cuts down the risk of cross-contamination from iron particles on stainless steel surfaces compared to carbon steel wire. That's a plus for maintenance, repair work, and pre-cleaning equipment parts in process industries, where surfaces need a clean, uniform base for further treatment.
With the right speed and technique (light to moderate pressure, even sweeps), you get controlled results without unnecessary removal of the base material. Regular breaks prevent overheating and extend the brush's life.

What it's for:

Heavy rust and paint removal: The knotted INOX wire strips off thick corrosion and coating layers fast. The copper structure reduces edge bite and helps keep the finish even on large steel and stainless surfaces. Handy before sandblasting, grinding, or priming.

Cleaning weld splatter and slag: The twisted bundles handle point loads well and remove splatter plus heat-affected zone oxides before passivation or painting. Smoother surface means less sanding later.

Surface roughening before coating/gluing: Mechanical roughening improves adhesion for coatings and adhesives. The 100 mm size strikes a good balance between coverage and control, speeding up prep on production lines.

Maintenance in outdoor and damp conditions: Stainless wire stands up to splashes and weather changes. Good for railings, stair parts, tanks, machine components, and steel structures where minimizing cross-contamination matters.

Features:

Diameter: 100 mm – Good coverage for bigger surfaces, still easy to handle.

Attachment: M14 thread – Fits most angle grinders.

Brush material: Stainless steel wire (INOX), knotted – Aggressive cut, tough under point loads.

Structure: Cup brush – Stable contact, even finish, minimal edge bite.

Targets: Rust, paint, oxides, slag, splatter – Cleaning and roughening before further treatment.

Speed: Stick to the max value on the package – To avoid overheating and damage.

Compatibility: 115-125 mm angle grinders – Guard must be used.

Yato Cup Brush M14 100 mm Knotted Stainless Steel – usage instructions:

Installation: Unplug the machine. Attach the brush to the M14 thread and tighten per manufacturer's instructions. Make sure the guard is in the right position.

Test run: Spin it idle for a short bit; stop if there's weird vibration or wobble.

Working: Hold the brush at a shallow angle, use light to moderate pressure. Do even sweeps; avoid prolonged point contact.

Breaks and checks: Stop regularly, clear loose stuff, and check wear. Replace the brush if bundles are missing, wire is unevenly shortened, or the cup is damaged.

Maintenance: Clean dust and chips; dry and store in a dry place. Don't straighten bent twists.

Warnings:

Always wear safety glasses/visors, dust-level appropriate respirator, gloves, and ear protection if needed.

Don't exceed the brush/machine's speed limit.

Don't use a damaged or unbalanced brush.

Keep flammable materials away from the spark area; sparks can come from the workpiece.

No use in explosive atmospheres. Keep out of kids' reach.

Frequently Asked Questions, FAQ:
Why knotted wire instead of crimped? Knotted wire is stiffer and more aggressive – it removes thick rust and slag faster. Crimped is milder for even roughness.
Can you use the brush on stainless steel? Yeah. INOX wire reduces iron contamination. Clean the surface after use.
Does it work on aluminum? For light oxide removal and roughening, yes. Avoid too much pressure and heat so it doesn't scratch deep.
When to replace the brush? When the knots are unevenly shortened, bundles are missing, or vibration increases – swap for a new one.

Recycling instructions:

Packaging: Cardboard/paper – recycle; any plastic films – plastic collection.

Product: Metal cup and stainless wire – metal recycling; other parts per local guidelines.