How to Select and Use Cylinder Honing Tools: BRM Announces Surface Finishing Guide; Describes Flex-Hone® Diameters and Operating Parameters

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Brush Research Manufacturing (BRM), global supplier of flexible honing tools and abrasive nylon brushes, is announcing a technical guide that explains how cylinder hone diameter affects operating parameters such as speed, stroke rate, and cross-hatch angle. The Flex-Hone® Resource Guide also explains how to select and use BRM cylinder honing tools for superior surface finishing and deburring.

Flexible Cylinder Honing Tools for Bore Diameters from 4mm to 36"

Flexible Cylinder Honing Tools for Bore Diameters from 4mm to 36"

Diameter is an important specification to consider not just during brush tool selection, but also during Flex-Hone® use.

Brush Research Manufacturing (BRM), American maker of flexible hones and abrasive nylon brushes, is announcing a technical resource that explains how to select and use flexible cylinder honing tools. The Flex-Hone® Resource Guide explains how ball hone diameter drives speed and stroke rate and also affects cross-hatch angle.    

A flexible, resilient honing tool, the BRM Flex-Hone® is self-centering, self-aligning to the bore, and self-compensating for wear. Known also as ball hones, these brushing tools feature abrasive globules that are permanently laminated to flexible nylon filaments. BRM cylinder hones remove burrs and improve surface finish at the same time, and can be used in either handheld electric tools or machining centers.    

Flex-Hone® Diameters and Recommended Speeds

Flex-Hone® tools are used in an oversized condition to produce a soft cutting action. For example, the cylinder hone for a 3” bore is listed as a 3” tool but has a tool diameter that is slightly larger than 3”. Diameter is an important specification to consider not just during brush tool selection, but also during Flex-Hone® use. Tool size helps determine the recommended operating speed in revolutions per minute (RPM).

The Flex-Hone® Resource Guide provides general ranges for rotational speeds; however, users should perform machine trials to test their own equipment against these guidelines. As a rule, larger cylinder hones run at slower speeds and smaller cylinder hones run at faster speeds. Stroking rate and cross-hatch angle are also related to tool diameter.

Stroking Rate and Cross-Hatch Angle

Stroke rate is the number of inches per minute (IPM) that are fed or stroked during flexible honing operations. Depending on how the Flex-Hone® tool is configured, stroke rate is controlled by either a human operator or machine parameters. Stroke rate is also related to the angle of the cross-hatch marks on the cylinder walls. These tiny oil-retaining grooves help to optimize lubrication.

As the Flex-Hone® Resource Guide explains, BRM cylinder hones impart a cross-hatch pattern and produce a plateau finish. The angle at which the cross-hatched lines intersect can vary, and is a function of both stroke rate and rotational speed. Use a slower stroke rate to achieve a smaller angle, and a faster stroke rate to produce a larger angle. For any cross-hatch angle (e.g., 20° to 23°, or 45%), larger-diameter ball hones have slower stroke rates than smaller-diameter tools.

For more information, click here to download the Flex-Hone® Resource Guide.

About Brush Research Manufacturing

Brush Research Manufacturing (BRM), makers of flexible honing tools and a full line of industrial brushes, is located in Los Angeles, California. For over 55 years, BRM has been solving surface finishing challenges with brushing technology. BRM’s Flex-Hone® tool is the industry standard against which all other surface finishing solutions are compared. Visit the BRM website to learn more.

Media Contact:

Heather Jones
Director of Marketing
Brush Research Manufacturing Co. Inc.
4642 Floral Drive
Los Angeles, CA 90022
Ph: (323) 261-2193

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Heather Jones
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