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Before and finish, the machine shop opted for 80 grit. The tool
after with the can be automated on CNC equipment or offline as a
BRM deburring secondary deburring operation.
solution According to Mawazeb, the abrasive nylon brush
met all his requirements, including how well it fit in
his 5-axis machine’s magazine holder and existing
toolholders. However, the primary concern was how
much material the brush would remove. “We didn’t
want the brush to affect the outer diameter
measurements in a way that affected the
performance of the ports,” says Mawazeb.
After testing the abrasive nylon brush, Mawazeb
flexible files, conforming to part contours, wiping says he was impressed. In addition to removing the
and filing across part edges and surfaces to deliver large burrs, the brush also provided a soft edge
maximum burr removal rates. break to the 4 ports so they were not razor sharp
Although an excellent tool, the abrasive disc without affecting the surface finish.
brushes were not sufficient removing the burrs. “The abrasive nylon brush removes just the right
“After testing out disc brush with different depths amount of material,” says Mawazeb. “The surface
and speeds, we decided to try an abrasive nylon finish actually matched what the customer wanted
wheel brush,” says Elysha Cole, Product Support as well.”
Specialist at Brush Research. “It was able to easily After proving the concept in the lab, JR
get into the slots, push the burrs out and remove Precision & Welding ultimately decided to purchase
them.” a smaller 3in diameter version of the wheel brush.
The shorter trim fill has less give, so delivers an
Durable and self-sharpening even more aggressive action.
The abrasive-filled nylon filaments are set into Mawazeb says he also tried another brush from
molded cores, allowing higher filament densities another supplier, but was not impressed. The
and putting more cutting tips at the point of attack. filaments were angled down and the fill was not as
In addition, the filaments are extremely durable and compact as the abrasive nylon wheel brush from
self-sharpening, providing excellent performance Brush Research.
and wear life. As the brushes come in contact with “I tried another brush, but didn’t like how it
the work surface, the filament grit wears off, performed. When it would go over the part, it
exposing new cutting particles. In that manner the would be like it was a toothbrush, just rubbing over
brush continues to be sharp even after repeated metal. So, it didn’t actually remove anything. It
use. In addition, unlike the bristles of metal brushes actually scuffed up the part more and left a horrible
the abrasive nylon fibers are not prone to deforming finish,” explains Mawazeb.
or breaking off like wire brushes. According to Mawazeb, the machine shop has
The product utilized to prove the concept was a installed the abrasive nylon brushes and the
6in diameter tool with silicon carbide filaments. equipment is programmed for the next order muzzle
Because the burrs were a bit heavier and the breaks scheduled for production in the next month.
customer was not concerned about the final surface www.brushresearch.com

June 2020 • INDUSTRIAL TECHNOLOGY EXTRA! • p16