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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 Surface Finishing

Posted April 03, 2012 11:00 AM by Brush Research

Modern Machine Shop is a monthly magazine for production, engineering, and management personnel in the metalworking industry. Recently, Brush Research Manufacturing (BRM) was featured in both the on-line and print versions of this popular periodical for its flex-hone tool. The in-depth case study explained how two companies, Heule Tool Corporation and Vektek, use flexible honing to meet exacting surface finish requirements.

Surface Finishing Hardened Materials at Heule Tool Corporation

Heule Tool Corporation of Cincinnati, Ohio is a cutting tool manufacturer that describes itself as "the quality leader" in through-hole deburring, chamfering, and countersinking. According to Gary Brown, Heule Tool's vice president and general manager, metals such as nickel, stainless steel, and titanium pose special challenges. If burrs and other surface imperfections aren't removed from fastener through-holes, components made from hardened materials won't fit together properly.

That's why Heule Tool uses flexible honing as part of its finishing process. First, a combination DEFA precision chamfering tool and COFA universal deburring tool cuts through the metal and adds beveled edges on the front and back of the part. This automated process performs the edge-breaking step, and removes drill burrs and drill caps. "We also recommend," Brown adds, "going in with the flex-hone to round the transition between the beveled edge and the hole".

Surface Finishing Cylinder Cavities at Vektek

Like Heule Tool, Vektek of Saint Joseph, Missouri recommends flexible honing for removing surface imperfections. A supplier of workholders, Vektek depends upon the flex-hone to prepare fixture cavities to accept cylinders for the company's hydraulic and pneumatic clamping systems. If a metal cylinder has small scratches or other surface imperfections, the seals may fail and render the fixtures unusable. Such was the case with 300 fixture cavities that were improperly machined in China.

"These cylinders require a very good seal - very accurate, very round, and with a high-quality surface finish", explains Rob Nelson, vice president of Vektek International Sales. So the American company advised its Chinese customer, a manufacturer of heavy equipment, to use a flexible hone to properly finish the cylinder cavities and eliminate sealing problems. By mounting this surface finishing tool in a handheld drill, Vektek's customer "saved 300 very expensive holes", Nelson explains.

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

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