Page 14 - Industrial_Technology_EXTRA_1st_June_2020_Classical

SURFACE FINISHING...

A deburring solution for

extremely hard metal parts

When an application calls for surface finishing, cleaning, polishing, deburring, edge
blending or removal of paint, rust or other contamination, a wheel brush is often the

ideal solution. Wheel brushes are motor-driven and may feature an arbor hole or
keyway that supports their use with grinding equipment or CNC machinery

type of power brush, wheel brushes are
circular in shape with uniform
distribution of the fill materials extending
Aradially from the center core to the
periphery. When metal wire filaments are
used, they are excellent tools for light
deburring, edge blending and general
surface finishing. The brushing action
occurs at the edge or face of the tool on
machined parts such as steel shafts, gears,
turbine blades, or extrusion cut-offs.
However, when harder materials are
involved, wire filaments can break off, or
deform – even if crimped. Although knotted
wire options are available for more aggressive
deburring, for today’s hardened steels and alloys
even this type of wheel brush is not sufficient.
Instead, for the most aggressive deburring or
surface finishing the solution is a wheel brush that
utilizes abrasive nylon filaments made of silicon For JR Precision & Welding, a machine shop in
carbide. Taking it one step further, diamond grit can Houston, Texas, the issue of removing large burrs
be used for the hardest metals and alloys in use from machined holes in an extremely hard 4140
today. The construction of these composite hub steel alloy part used as a muzzle brake for firearms
radial wheel brushes, as they are called, provides a was proving a challenge. Founded in 2017, the
long-lasting wheel with less filament breakage and machine shop specializes in 3 and 5-axis CNC
superior performance. manufacturing, 3D printing and welding. A muzzle

June 2020 • INDUSTRIAL TECHNOLOGY EXTRA! • p14