Brush Research Mfg. BC23418 Flexible Cylinder Hone 180 Grit

Product Description

The BRUSH RESEARCH MFG. BC23418 is a flexible cylinder hone designed for precision surface finishing inside bores and cylinders. Built with silicon carbide abrasive in an extra fine 180-grit grade, it delivers controlled material removal and smooth surface finishing in a single pass. The hone accommodates bores up to 2.75 inches in diameter and runs at a maximum of 900 RPM. With an overall length of 8 inches and an abrasive section spanning 3 inches, it fits standard drill chucks via a 0.245-inch shank diameter. Licensed machinists, mechanics, and engine rebuilders use this tool for bore prep and hone finishing on a range of ferrous metals.

The BC23418 is suited for use on mild steel, stainless steel, and cast iron workpieces. Typical applications include cylinder wall reconditioning, valve guide honing, and bore surface preparation in both shop and field settings. Its flexible ball-style abrasive construction allows the hone to self-center within the bore, making it practical for light material removal and cross-hatch pattern generation in engine blocks, hydraulic cylinders, and similar components.

Key Features

• 180-grit silicon carbide abrasive for extra fine material removal
• Maximum bore diameter of 2.75 inches
• 3-inch abrasive length for effective bore contact
• 8-inch overall length fits standard drill chucks
• 0.245-inch shank diameter compatible with common handheld drills and drill presses
• Rated up to 900 RPM for controlled, safe operation

Compatibility

Designed for use on mild steel, stainless steel, and cast iron bore applications up to 2.75 inches in diameter.

Installation Notes

This hone is installed in a handheld drill or drill press by inserting the 0.245-inch shank into the chuck. Keep the tool speed at or below 900 RPM during operation to prevent abrasive damage and ensure safe use. Apply a suitable honing oil or lubricant to the bore surface before use to extend abrasive life and improve finish quality. Do not force the hone into undersized bores; always verify bore diameter is within the rated range before operation.