13G303 - Walter 3-Inch Knot Wire Cup Brush with 1/2-13 Thread for Steel

Premium Surface Preparation with Walter Technologies

The Walter 13G303 3-Inch Knot Wire Cup Brush represents the pinnacle of abrasive wire technology, designed specifically for industrial environments where performance and safety are non-negotiable. Engineered by Walter Surface Technologies, this brush utilizes top-tier oil-hardened and tempered steel wires. This specific tempering process ensures that each wire strand retains its stiffness and structural integrity even under the thermal stress of heavy-duty grinding and cleaning operations. Unlike inferior brushes that shed wires prematurely, the 13G303 is built to withstand rigorous use, providing a consistent finish and extended service life.

One of the standout features of this model is its precision balancing. In high-speed rotational applications, even minor imbalances can lead to excessive vibration, which accelerates wear on power tool bearings and causes operator fatigue (Hand-Arm Vibration Syndrome). Walter guarantees optimum balance in their cup brushes, ensuring smooth operation that protects both the worker and the equipment. Furthermore, the inclusion of a safety supporting ring is a critical design element. This ring prevents the knot-twisted wires from flaring outwards too quickly, maintaining a tight, aggressive brushing face for longer and significantly reducing the risk of wire breakage.

Designed with a 1/2"-13 threaded arbor, this brush is compatible with specific pneumatic and electric grinders commonly found in heavy fabrication shops. The knot-twisted configuration provides high-impact action, making it ideal for digging into pitted surfaces to remove heavy rust, slag, and scale. Whether used for surface preparation prior to coating or for cleaning up after structural steel work, the Walter 13G303 delivers reliable, professional-grade results.