13F303 - Walter 3-Inch Knot-Twisted Wire Cup Brush with 1/2-13 Arbor

Heavy-Duty Cleaning with Walter Surface Technologies

The Walter 13F303 3-Inch Knot-Twisted Wire Cup Brush is an industrial-grade abrasive tool designed for the most demanding surface preparation and cleaning tasks. Engineered by Walter Surface Technologies, a leader in surface treatment solutions, this brush features a robust knot-twisted construction. Unlike crimped wire brushes which are suited for lighter surface finishing, the knot-twisted design provides high-impact action, making it the ideal choice for removing heavy encrustations, thick rust, and stubborn scale from steel surfaces.

Reliability and safety are paramount in industrial environments. This cup brush is manufactured from premium oil-hardened and tempered carbon steel wire. This high-quality material selection ensures that the wires maintain their stiffness and integrity even under thermal stress and high RPMs. The brush is meticulously balanced to ensure concentricity, which significantly reduces vibration during operation. Less vibration means less wear on your power tools and, more importantly, reduced fatigue for the operator, allowing for longer periods of comfortable and precise work.

The 13F303 model comes equipped with a 1/2"-13 threaded arbor, a standard size for many pneumatic and electric angle grinders. This integral thread ensures a secure, spin-on attachment that won't loosen during aggressive brushing. Whether you are preparing surfaces for painting, cleaning structural steel, or performing maintenance on heavy machinery, this Walter cup brush delivers consistent, high-performance results that professionals trust.

Key Industrial Applications

• Surface Preparation: Aggressively removes old paint, primer, and coatings to expose bare metal.
• Heavy Rust Removal: Breaks down deep-seated rust and corrosion on beams, pipes, and plates.
• Scale Removal: Effectively clears mill scale from hot-rolled steel.
• Deburring: Smooths out rough edges and burrs from machined or cut parts.