Schaefer Brush 93613 Tube Brush 9/16 in Brass Bristles

Product Description

The SCHAEFER BRUSH 93613 is a double stem, single spiral tube brush designed for cleaning the interior of tubes, pipes, and small-bore passages. The double stem construction provides added rigidity, while the single spiral configuration distributes brass bristles evenly along the 4-inch brush length. At 9/16 inch in diameter and 6.25 inches in overall length, this brush fits into tight bore diameters where larger tools cannot reach. The male connection end allows it to attach to standard extension handles or drive tools. Brass bristles are non-sparking and resistant to corrosion, making them well suited for use on copper, brass, and softer alloy tubing commonly found in HVAC, refrigeration, plumbing, and light industrial applications.

This tube brush is used wherever tube and pipe bore cleaning is required prior to soldering, brazing, or inspection. Typical applications include cleaning copper refrigerant lines, condenser and evaporator tubes, heat exchanger passages, and plumbing fittings. The 9/16-inch brush diameter makes it a practical fit for common small-diameter tubing encountered in residential and light commercial HVAC and plumbing work. Technicians also use brushes of this type for flux removal, light deburring, and bore preparation before fitting assembly.

Key Features

• Double stem construction adds stiffness and durability during scrubbing strokes
• Single spiral pattern distributes brass bristles evenly across the 4-inch brush length
• Brass bristles are non-sparking and safe for use on copper, brass, and soft alloy surfaces
• 9/16-inch brush diameter fits common small-bore tube and pipe sizes
• Male connection end compatible with standard extension handles and drive tools
• Lightweight at 0.14 pounds, easy to handle in confined spaces

Compatibility

Designed as an OEM-style replacement or direct-use tube brush for small-bore cleaning applications in HVAC, refrigeration, and plumbing service work requiring a 9/16-inch diameter brush.

Installation Notes

Insert the brush into the tube bore and work with controlled back-and-forth strokes to avoid bristle flaring or premature wear. Ensure the bore diameter is compatible with the brush diameter before use — forcing an oversized brush can damage bristles or score tube walls. Attach the male connection end securely to any extension handle before use. Wear appropriate eye and hand protection when cleaning debris from tube bores.