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BRM's Flexible Honing, Surface Finishing, and Deburring Blog

BRM's Flexible Honing, Surface Finishing, and Deburring Blog is the place for conversation and discussion about how to solve difficult finishing problems. For over 50 years, Brush Research Manufacturing (BRM) has helped customers use brushing technology to clean, rebuild, and resurface components ranging from engine cylinders to brake rotors to flywheels to firearms. BRM's Blog on CR4 provides real-world examples of how flex hones and wire brushes work. It also evaluates related technologies and invites questions from the community.

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Flexible Honing for Gun Cleaning and Maintenance

Posted May 01, 2012 8:30 AM by Brush Research

Flexible honing tools for firearms are used by gun makers, gun dealers, shooters, hobbyists, and gunsmiths to clean and maintain shotguns, rifles, pistols and revolvers, and paintball guns.
Available in a range of sizes and for specific gauges, these versatile gun cleaning tools produce an optimum surface finish in any chamber, cylinder, slide, magazine tube, or smooth bore barrel.

Gun Cleaning Brushes for Pistols and Revolvers

Recently, flexible hones were featured in Gun Trade World, an on-line magazine that covers firearms news, companies, and products. In Polishing up on Gun Maintenance (April 2012), Gun Trade World examined how shooters such as our own Robert (Bob) Fowlie use the Flex-Hone to polish the chambers of single-action revolvers. Slick chambers are a must in competitions such as cowboy-action shooting, where every second counts. By causing brass cases to eject more easily, slick chambers also improve reliability in semi-automatic weapons.

Gun Polishing Tools for Shotguns and Rifles

Flex-Hone tools for shotguns can have long or short stems.

  • Longer-stemmed tools can be used to polish the entire length of a shotgun barrel so that fired cases eject more easily, reducing the strain on the gun's extractors and ejectors.
  • Shorter-stemmed tools are used to polish both the chamber and the forcing cone, where the shot and wadding are subjected to forces that create build-up.

Forcing cones can also be polished with industrial brushes that have tapered profiles.

Although the Flex-Hone for firearms is not designed to rifle bores, some barrel makers use this versatile tool to polish their blanks prior to cutting for a smoother bore finish. Gun owners also use the Flex-Hone for rifles. By safely and properly removing residues from the rifle chamber, this tool produces a wear-resistant finish while removing surface imperfections.

Barrel Hones: Types and Grits

As the article in Gun Trade World explains, gun brushes and barrel hones from Brush Research Manufacturing (BRM) are 34 inches long and available in 10, 12, 16, and 20 gauge. When selecting a Flex-Hone for firearms, choice of grit is a key consideration.

  • Use 800-grit to achieve a final finish. If your firearm has a decent finish already, this grit will be the only one you'll need to use.
  • Use 400-grit if your gun has coarse tool marks or scratches. After blending them out, use an 800-grit flexible hone to achieve the final finish.
  • Use 180-grit only if there are very deep scratches or severe pitting. Then use the 400-grit, and finally the 800-grit.

Although most firearms with good finishes only need an 800-grit Flex-Hone, users may need to start with the 400-grit tool if there are coarse tool marks or scratches.

Author's Note: This CR4 blog entry originally appeared in BRM's Flex-Hone Blog.

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