Brush Research Manufacturing

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Brush Research Manufacturing Brush Research is a world class manufacturer of industrial brushes and the Flex-Hone® Tool. http://www.brushresearch.com BRM is an ISO 9001 certified company.

The Flex-Hone® is a surface finishing and deburring tool for the automotive, industrial and aerospace industries. BRM has long been a leader in the art and science of abrasive surface
finishing culminating in the Brush Research Flex-Hone® Tool. BRM was one of the first companies to advocate the critical need for finer surface finishes to optimize machine performance. Today BRM remains at the forefront of abrasive finishing technology. Our commitment to the advancement of surface finishing remains
as strong as ever and we are constantly experimenting with new
materials and applications. As a full line manufacturer of power brushes, twisted in wire brushes
and the Flex-Hone® Tool we stand ready to assist you in finding the
best solution to your finishing needs.

"Cleaned up like a fresh bore on a 40 year old 289, " Amazon reviewer Harold Brown told us. The Ford 289 was a 4.7L smal...
10/12/2026

"Cleaned up like a fresh bore on a 40 year old 289, " Amazon reviewer Harold Brown told us. The Ford 289 was a 4.7L small-block from the 1960s. The cylinder on the right shows how the Flex-Hone gets great results. https://na2.hubs.ly/H089PRN0

"Excellent hone," Amazon reviewer David Kenney reported. The Flex-Hone "was delivered within 48 hours and I finished cle...
10/09/2026

"Excellent hone," Amazon reviewer David Kenney reported. The Flex-Hone "was delivered within 48 hours and I finished cleaning up my cylinders within minutes!" Nice crosshatching, David. https://na2.hubs.ly/H089PRk0

Why does the crosshatch go right up to the edge of the bore? It's to ensure proper piston ring seating and lubrication t...
10/07/2026

Why does the crosshatch go right up to the edge of the bore? It's to ensure proper piston ring seating and lubrication throughout the entire piston stroke. How do you get this ideal surface finish? Use the Flex-Hone. https://na2.hubs.ly/H089PQq0

Why is the Flex-Hone larger than the bore? It's to create the proper contact pressure against the cylinder's wall. That'...
10/05/2026

Why is the Flex-Hone larger than the bore? It's to create the proper contact pressure against the cylinder's wall. That's not all. The oversize allows the tool to naturally center and align itself inside the bore. https://na2.hubs.ly/H089PRb0

It's slightly larger by design. Why is the Flex-Hone used in an oversized condition? It's to create a soft, gentle cutti...
09/30/2026

It's slightly larger by design. Why is the Flex-Hone used in an oversized condition? It's to create a soft, gentle cutting action that ensures even pressure across the cylinder wall. The oversize also centers the tool in the bore. https://na2.hubs.ly/H07W6720

This 68 mm two-stroke engine "came out perfectly cross-hatched," Amazon reviewer Marineprosw told us. The mechanic used ...
09/28/2026

This 68 mm two-stroke engine "came out perfectly cross-hatched," Amazon reviewer Marineprosw told us. The mechanic used the Flex-Hone to impart the ideal surface finish to the cylinder walls. Crosshatching promotes oil retention along with piston ring seating and sealing. https://na2.hubs.ly/H07W67q0

"This is the best hone I've ever used", Fordmech8011 told us in an Amazon review. For this project, the mechanic used a ...
09/25/2026

"This is the best hone I've ever used", Fordmech8011 told us in an Amazon review. For this project, the mechanic used a 3.5-inch Flex-Hone tool to deglaze and cross-hatch the cylinders on a 5.4L 3V engine. "Very high quality results." https://na2.hubs.ly/H07W66W0

There's a lot to like about the Flex-Hone tool, especialy if you've only used 3-stone hones before. Amazon reviewer Spik...
09/23/2026

There's a lot to like about the Flex-Hone tool, especialy if you've only used 3-stone hones before. Amazon reviewer Spikey Racer told us he likes how "the covered surface area is much greater" with the Flex-Hone, and how the "pressure is going to be even over a smaller area." https://na2.hubs.ly/H07W67h0

Can you use the Flex-Hone with golf carts? Absolutely. Amazon reviewer Ace Tow and Auto used our engine hone to surface ...
09/21/2026

Can you use the Flex-Hone with golf carts? Absolutely. Amazon reviewer Ace Tow and Auto used our engine hone to surface finish the single cylinder of a Kawasaki FE350. "Worked great," the mechanic wrote. "I also bought the hone oil they recommend." https://na2.hubs.ly/H07W66D0

An Amazon reviewer named Roach used a 4.125-inch, 240-grit Flex-Hone to surface finish the cylinders on a pair of EJ25 S...
09/18/2026

An Amazon reviewer named Roach used a 4.125-inch, 240-grit Flex-Hone to surface finish the cylinders on a pair of EJ25 Subaru engine blocks. BRM's engine hone is "the best you can get without taking your block to a machine shop," he wrote in his five-star review. (Thanks, Roach!) https://na2.hubs.ly/H07Mvxj0

Address

4642 Floral Drive
Los Angeles, CA
90022

Opening Hours

Monday 8am - 4:30pm
Tuesday 8am - 4:30pm
Wednesday 8am - 4:30pm
Thursday 8am - 4:30pm
Friday 8am - 4:30pm

Telephone

(323) 261-2193

Website

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