Osborn 0003240500 Cup Brush 2-3/4 in Steel Crimped

Product Description

The OSBORN 0003240500 is a crimped-wire cup brush designed for surface preparation, deburring, and weld cleaning on metal workpieces. The brush measures 2.75 inches in diameter with a wire diameter of 0.014 inches, using steel fill material for durable, aggressive contact with hard surfaces. It fits a standard 5/8-11 threaded arbor and is rated for use up to 14,000 RPM on compatible angle grinders and die grinders. A trim length of 1 inch provides consistent wire contact and stable brush action under load. This tool is commonly used by fabricators, pipefitters, welders, and maintenance technicians who need reliable material removal without surface-specific abrasives.

This cup brush is suited for use on steel, iron, and similar ferrous metals in both shop and field environments. Typical applications include removing rust, mill scale, paint, and weld spatter from flat and contoured surfaces. It is well-matched to light fabrication work, pre-weld joint prep, and post-weld cleanup on structural components, pipe joints, and plate stock. The crimped wire configuration delivers a consistent, slightly flexible action that reduces wire breakage during extended use compared to knotted wire designs.

Key Features

• 2.75-inch brush diameter provides broad surface coverage in a single pass
• 0.014-inch steel wire diameter balances aggression and wire longevity
• Crimped wire fill reduces wire fatigue and breakage during prolonged use
• 5/8-11 threaded arbor hole fits standard angle grinder spindles
• 14,000 RPM maximum speed rating for use with high-speed power tools
• 1-inch trim length maintains consistent wire pressure and stable brush geometry

Compatibility

Designed for use with angle grinders and die grinders equipped with a 5/8-11 threaded spindle arbor. Suitable for ferrous metal surface preparation applications in fabrication and maintenance settings.

Installation Notes

Installation and operation should be performed by qualified personnel familiar with power tool safety practices. Always power down and disconnect the grinder before mounting or removing the brush. Verify the tool spindle speed does not exceed the 14,000 RPM maximum rating of the brush before operation. Operators should wear appropriate PPE including face shields and gloves, and inspect the brush for wire damage before each use.