Brush Research Mfg. RMFH120Z25 Flexible Cylinder Hone 120 Grit

Product Description

The BRUSH RESEARCH MFG. RMFH120Z25 is a flexible cylinder hone designed for bore finishing and surface conditioning in metalworking and automotive service applications. Built with 120-grit zirconia alumina abrasive, this medium-grade hone delivers consistent material removal on a range of ferrous metals. It handles bore diameters up to 2.5 inches and operates at a maximum speed of 600 RPM. The 0.281-inch shank diameter allows it to chuck into standard power drills and honing equipment. Machinists, automotive technicians, and engine rebuilders rely on this tool for controlled, repeatable bore surface preparation.

The RMFH120Z25 is suited for finishing disc brake rotors and flywheels, as well as bore conditioning work on low-carbon to medium-carbon steels, stainless steel, and cast iron. Its flexible design allows the abrasive to conform to the bore surface, making it practical for cylindrical finishing passes where rigidity would cause uneven contact. The 2.5-inch abrasive length provides adequate engagement depth for typical brake rotor and flywheel hub bore applications encountered in automotive and light industrial service.

Key Features

• 120-grit zirconia alumina abrasive for medium-grade material removal on ferrous metals
• Maximum bore diameter of 2.5 inches accommodates common brake rotor and flywheel bore sizes
• Flexible construction allows abrasive to conform to bore surface for even contact
• Maximum operating speed of 600 RPM for use with standard power drills and honing equipment
• 0.281-inch shank diameter fits standard drill chucks
• Compatible with low-carbon to medium-carbon steels, stainless steel, and cast iron

Compatibility

Designed for use on disc brake rotors and flywheels, and suitable for bore finishing on low-carbon to medium-carbon steels, stainless steel, and cast iron workpieces up to 2.5 inches in bore diameter.

Installation Notes

This hone is installed by inserting the 0.281-inch shank into a standard drill chuck and tightening securely before operation. Do not exceed the 600 RPM maximum speed rating. Always wear appropriate eye protection and ensure the workpiece is securely fixtured before beginning the honing pass. Disconnect power from any equipment before changing or inspecting the hone.