Fiber Discs

Resin fiber discs for angle grinders, run on a backing pad for aggressive stock removal, weld blending and surface preparation on flat and lightly contoured work.

Ceramic grain is worth the premium

Aluminum oxide is the cheap grain and it dulls quickly. As it dulls it stops cutting and starts rubbing, and rubbing means heat - which on stainless produces the blue discolouration and distortion you then have to remove.

Ceramic grain is self-sharpening: the grit fractures under pressure to expose fresh cutting edges instead of rounding over. It cuts cooler, holds its rate through the life of the disc, and typically lasts several times longer. On stainless and hard alloys the economics are not close. On occasional mild steel work, aluminum oxide is still the sensible buy.

Use the pressure the disc is designed for

Ceramic discs need firm pressure to fracture the grain and keep cutting. Feathering them the way you would a worn aluminum oxide disc glazes them and wastes the money you spent. Let the disc work.

The backing pad is part of the system

A worn or wrong-durometer pad gives uneven contact, which wears one side of the disc and gouges the work. Firm pads for aggressive flat removal, softer pads for blending and contour. Replace the pad when the face is no longer flat.

Keep a set for stainless only

Discs used on mild steel carry iron particles into the next job. On stainless those particles embed and rust in service - the customer sees rust on a stainless fabrication and reads it as a failed weld. Buy contaminant-free discs specified for stainless and store them apart.

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