48H393 - Walter 13-L 304 Knot-Twisted Wire Cup Brush with Support Ring, 3" Carbon Steel

Industrial Grade Surface Preparation

The Walter Surface Technologies Knot-Twisted Wire Cup Brush (Model 13-L 304, Distributor SKU 48H393) represents a significant advancement in abrasive wire brush design. Engineered for the most demanding industrial environments, this 3-inch brush is constructed from premium oil-hardened and tempered carbon steel wire. The wire strands are tightly twisted into knots, providing aggressive cutting action suitable for removing heavy scale, rust, and thick coatings from steel surfaces.

A defining feature of this model is its integrated Safety Support Ring. In standard wire brushes, high rotational speeds and pressure often cause wires to flare outwards, reducing cleaning efficiency and increasing the risk of wire breakage. Walter's support ring constrains the wires, maintaining a tight, aggressive brush face and significantly extending the tool's usable life. As the wire wears down, the user can easily remove the ring to expose fresh wire length, effectively giving the brush a second life. Each unit is precision-balanced to run smoothly at speeds up to 12,000 RPM, minimizing vibration and protecting both the angle grinder bearings and the operator from fatigue.

This brush is designed with a standard 5/8"-11 threaded arbor, making it compatible with the vast majority of North American angle grinders. It is an essential tool for MRO professionals requiring reliable, safe, and long-lasting abrasive solutions for steel fabrication and maintenance.