Weiler 12406 Knotted Cup Brush 4 in Stainless Steel

Product Description

The WEILER 12406 is a knotted cup brush designed for aggressive surface preparation on metal and fabricated components. The brush features a 4-inch diameter with stainless steel fill wire at 0.014 inches, twisted into knotted strands that deliver concentrated cutting action for weld splatter removal, rust, mill scale, and coating removal. A 5/8-11 threaded arbor hole mounts directly to standard angle grinders. Rated to 10,200 RPM, it handles high-speed tool operation without compromising structural integrity. The single-row design focuses wire contact at the work surface, making it a reliable choice for weld preparation and post-weld cleanup work performed by fabricators, pipefitters, and maintenance technicians.

This cup brush is suited for use on stainless steel workpieces, carbon steel weldments, and structural fabrications where iron contamination from carbon steel wire must be avoided. Stainless steel fill prevents cross-contamination on food-grade, sanitary, or corrosion-resistant base materials. Common applications include pipe weld preparation, structural steel cleanup, and surface conditioning in industrial maintenance settings. It is compatible with standard right-angle grinders accepting a 5/8-11 arbor.

Key Features

• Knotted stainless steel wire fill resists corrosion and prevents iron contamination on stainless workpieces
• 4-inch brush diameter provides broad contact area for efficient surface coverage
• 5/8-11 threaded arbor hole fits standard angle grinder spindles
• 10,200 RPM maximum rating supports high-speed grinder operation
• 1.25-inch trim length delivers consistent wire contact and controlled flex
• Single-row construction concentrates wire action for aggressive material removal

Compatibility

Designed for use with standard angle grinders and die grinders equipped with a 5/8-11 threaded spindle arbor.

Installation Notes

Always power down and disconnect the grinder before mounting or removing the cup brush. Confirm the tool spindle speed does not exceed the brush maximum RPM rating of 10,200 before operation. Wear appropriate PPE including a face shield, gloves, and hearing protection. Follow ANSI B11 and applicable shop safety standards when operating wire cup brushes at speed.