MicroGroup Tube Brush Series #85 85-AY375

Nylon filaments with abrasive grain impregnated throughout. This allows sides to cut as well as the tips with new grains constantly being exposed as brush wears. Nylon mixed with abrasive and then extruded gives a filament that also polishes well. At the present there are ten sizes of filaments extruded, with fine grit in the small diameters (500 grit in .018 nylon), and coarse grit in the large diameter filaments (80 grit in .040 nylon). These are available in silicon carbide or aluminum oxide. Maximum safe free running speeds are about 3600 surface feet per minute. It’s important to remember that if the bristle tips are set hot, the nylon will melt and you may also have some nylon contamination on the part.