Fibre Backed resin bonded Sanding Discs

These are used in the same way as the Flap disc but are much more rigid and better suited to flat surfaces. Again they are Aluminium oxide discs, that come in various grades and need to be used with a special rubber backing pad.
The sharp, heat-treated grain is electrostatically coated to a heavy duty vulcanized fibre backing with heat resistant phenolic resins. Fast, cool cutting performance.
Applications include weld grinding, blending, finishing, deburring and high production work. Also for automotive industry, plastics, ferrous metals, paint, body fillers and fiberglass.

Resin Fiber discs are available in various grains:
A/O - for cutting, debburing and finishing on metals, welds and car body repair. grits: 16-120
Z/A - for high speed steel, stainless steel and hard steel. Rough grinding to finishing. grits: 16-120.
S/C - for non-ferrous materials, fiberglass, stone and masonry. grits: 16-400.

-Tbone