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Milwaukee 3-inch carbon steel knot wire cup brush for aggressive metal surface cleaning and rust removal.
Milwaukee

Milwaukee 3" Carbon Steel Knot Wire Cup Brush

$23.97 - $23.97
$23.97
$23.97 - $23.97
$23.97
Availability:
In Stock
SKU 48-52-5040

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Uncover the full potential of this product

The Milwaukee 48-52-5040 3" carbon steel knot wire cup brush is designed for demanding metal surface cleaning and preparation applications. Its knotted carbon steel wire construction is suitable for cleaning castings, structural steel and sheet metal. Hyperwire™ construction supports faster material removal and extended brush life, while the improved design helps reduce wire fatigue during use. Precision construction also helps reduce vibration for more controlled operation. Featuring a 5/8"-11 threaded arbor, this Milwaukee knot wire cup brush is designed for compatible 4-1/2-inch or 5-inch angle grinders with matching threaded spindles. It is a practical accessory for metal fabrication, welding, manufacturing and maintenance tasks.


  • Hyperwire™ Construction:

    Supports faster material removal and extended brush life during demanding metal surface cleaning applications.




  • Knotted Carbon Steel Wire:

    The knotted wire construction provides an aggressive brushing action for cleaning compatible metal surfaces, including castings, structural steel and sheet metal.




  • Reduced Wire Fatigue:

    The wire design helps reduce fatigue during use, supporting consistent performance across repeated cleaning tasks.




  • Precision Construction:

    Precision construction helps reduce vibration during operation, supporting improved control when cleaning metal components.




  • 3-Inch Cup Brush:

    The 3-inch brush diameter provides a compact format for compatible angle-grinder cleaning applications.




  • 5/8"-11 Threaded Arbor:

    The 5/8"-11 threaded arbor allows mounting on compatible angle grinders with a matching spindle connection. Check tool compatibility before installation.




  • 12,000 RPM Maximum Speed:

    The maximum operating speed is 12,000 RPM. Check that the grinder and brush are compatible and follow the manufacturer's operating instructions before use.




  • Structural Steel, Castings and Sheet Metal Cleaning:

    Designed for cleaning compatible castings, structural steel and sheet metal in metal preparation, fabrication and maintenance applications.




  • Milwaukee 48-52-5040 Product Identification:

    Use model number 48-52-5040 to identify this 3-inch knotted carbon steel wire cup brush when checking specifications and availability.





  • Brand:
    Milwaukee

  • Model / MPN / SKU:
    48-52-5040

  • Product Type:
    Knot Wire Cup Brush

  • Diameter:
    3 inches

  • Material:
    Carbon steel

  • Wire Style:
    Knotted

  • Wire Thickness:
    0.020" / 0.023"

  • Thread Size:
    5/8"-11

  • Maximum RPM:
    12,000 RPM

  • Compatible Tools:
    Compatible 4-1/2" or 5" angle grinders

  • Primary Applications:
    Cleaning castings, structural steel and sheet metal

  • Overall Length:
    3.95 inches

  • Product Weight:
    0.704 lb

  • Material Composition:
    Steel



Frequently Asked Questions

Look for a knot wire cup brush designed for structural-steel cleaning. The Milwaukee 48-52-5040 is a 3-inch carbon steel cup brush with a knotted design and is specifically suited to cleaning structural steel.

A knotted wire cup brush is suited to tough cleaning applications such as castings. The Milwaukee 48-52-5040 uses a knot wire design and is specifically listed for cleaning castings.

The Milwaukee 48-52-5040 is a 3-inch knot wire cup brush with a 5/8"-11 thread and is designed for use on compatible 4-1/2-inch or 5-inch grinders. Milwaukee lists sheet metal among its intended cleaning applications.

Yes. The Milwaukee 48-52-5040 uses precision construction that Milwaukee states reduces vibration. This design is intended to help reduce vibration rather than eliminate it completely.

Compare the brush diameter, wire thickness, construction, thread and maximum RPM. The Milwaukee 48-52-5040 is a 3-inch carbon steel knotted brush with 0.020"/0.023" wire thickness, a 5/8"-11 thread and a 12,000 RPM maximum. Its Hyperwire™ construction is designed for faster material removal and greater life, while its precision construction reduces vibration.

A knot wire cup brush designed for structural-steel cleaning can be used for this type of work. The Milwaukee 48-52-5040 has a knotted carbon steel construction and is specifically suited to cleaning structural steel.

The Milwaukee 48-52-5040 is a 3-inch carbon steel knot wire cup brush that Milwaukee lists as suitable for cleaning castings, making it an option for this application.

A wire cup brush with precision construction can help reduce vibration. Milwaukee states that the precision construction of the 48-52-5040 reduces vibration during use.

The Milwaukee 48-52-5040 is a 3-inch carbon steel knot wire cup brush intended for structural-steel cleaning. It has a knotted design, 5/8"-11 thread and is designed for compatible 4-1/2-inch or 5-inch grinders.

The Milwaukee 48-52-5040 features Hyperwire™ construction for faster material removal and greater life, while its precision construction is designed to reduce vibration. It is a 3-inch carbon steel knotted cup brush for compatible grinders.

A knot wire cup brush uses twisted or knotted wire, while a crimped cup brush uses crimped wire. Milwaukee describes crimped wire as less rigid and suitable for lighter-duty surface cleaning, while its knot wire cup brushes are suited to tough cleaning jobs such as castings, structural steel and sheet metal.

Check the brush diameter, thread, grinder compatibility and maximum RPM. The Milwaukee 48-52-5040 is 3 inches in diameter, has a 5/8"-11 thread, is designed for compatible 4-1/2-inch or 5-inch grinders and has a 12,000 RPM maximum.

The Milwaukee 48-52-5040 is a 3-inch carbon steel knot wire cup brush that Milwaukee lists as suitable for cleaning castings and sheet metal. It is also intended for structural-steel cleaning.

The Milwaukee 48-52-5040 is a 3-inch carbon steel knot wire cup brush with 0.020"/0.023" wire thickness and a 5/8"-11 thread. It has a knotted style and a 12,000 RPM maximum. Milwaukee's official listing identifies it as a single brush, and its stated applications include castings, structural steel and sheet metal.

The Milwaukee 48-52-5040 has a maximum speed of 12,000 RPM according to Milwaukee's official specification. A retailer entry showing 1,200 RPM should therefore be treated as an apparent listing error and corrected before publication.