Brush Research Mfg. 84N187 Nylon Spiral Brush

Product Description

The BRUSH RESEARCH MFG. 84N187 is a nylon spiral brush designed for cleaning, deburring, and surface preparation in tight cylindrical passages, ports, and bores. The brush features a 0.005-inch filament diameter and a 3/16-inch (0.1875-inch) brush diameter, making it well suited for precision cleaning tasks in small-diameter passages. The 0.097-inch shank diameter allows it to mount in standard rotary tools, drill presses, or flexible shaft machines. With an overall length of 8 inches and a working brush length of 1.5 inches, the 84N187 gives technicians reach into recessed areas without sacrificing control. HVAC, plumbing, and general mechanical trades use this type of brush for cleaning orifices, valve seats, heat exchanger ports, and similar bore geometries.

The 84N187 nylon spiral brush is used in light to medium cleaning applications where abrasive wire filaments would risk damaging soft metal surfaces or precision-machined bores. Common applications include cleaning refrigerant orifices, small gas valve ports, pilot orifices, burner ports, and hydraulic or pneumatic fittings. Nylon fill material is non-metallic, making it appropriate where ferrous contamination must be avoided. The brush is sold individually and is compatible with standard rotary tool chucks accepting a 0.097-inch shank.

Key Features

• Nylon fill material resists corrosion and will not contaminate ferrous-sensitive surfaces
• 0.005-inch filament diameter for gentle, controlled cleaning of precision bores
• 3/16-inch brush diameter fits small-diameter passages and orifices
• 8-inch overall length provides reach into recessed or deep cavities
• 0.097-inch shank diameter seats in standard rotary tool and drill press chucks
• Spiral construction maintains consistent contact around the bore wall

Compatibility

Designed for use with standard rotary tools, drill presses, or flexible shaft machines accepting a 0.097-inch diameter shank. Suitable for light cleaning of small-diameter bores and cylindrical passages across HVAC, plumbing, and general mechanical applications.

Installation Notes

Install the shank securely in the tool chuck before operating. Verify the tool is powered off and unplugged before mounting or removing the brush. Use appropriate eye protection and gloves when operating rotary brushes. Match brush diameter to the bore or passage being cleaned to avoid filament damage or inadequate contact.