The best flap discs | MIG Welding Forum

^^^ There's at least two reasons why ceramic is so much better, one the ceramic grit doesn't transmit heat to the bonding agent so they stay put rather than melting the glue that holds the abrasive in place like conventional flap discs do. And they also shatter and chip of tiny chunks of ceramic leaving a sharp broken cutting edge behind, so in effect the cutting surface is constantly renewed right up until the point it's gone hence the excellent stock removal from start to finish. We find disc life can be increased further still with no loss of cutting speed by reducing the RPM of the grinder by 20-30% (This only works if you have a variable speed grinder of course)

Often the ceramic disc will be priced at double the cost of a good quality ali ox, or zirc disc but with 4-5 times the life, faster stock removal and less down time swapping out worn discs then they are a financial winner, I don't know why more people don't use them.

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Thu Jul 21, 10:38 am

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Which flap discs?

What grit for removing mill scale? What grit for finishing?

Cheap ones in ten packs, or expensive singles?

What other essential wheels are liked?

I have a bunch, but having trouble removing mill scale with flap disc on 5" Bosch angle grinder. Maybe wheel is old/plugged? It also takes forever to re-shape tool steel combination wrench with 5" metal grinding disc.

Lincoln 100 amp transformer MIG w/flux core wire
HF TIG w/no pedal for steel & stainless, Stick w/3/32 ,
Formerly: Victor O/A and Lincoln 225 AC buzz box
Looking to upgrade
Bikes-XR250, CRF230