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19mm Keyway Abrasive Cloth Flap Brushes

There are two issues to consider when looking to mount a flap wheel or brush onto an angle grinder.  Firstly the maximum safe operating speed and secondly whether the angle grinder shaft and bearings can cope with the twist / tortion resultion from a wide wheel mounted on the head of the machine.


Maximum speed of 100mm diameter cloth flap wheels

FMLA 100 x 100mm abrasive flap wheels  max operating speed  5,700 rpm

FMLA 100 x 100mm abrasive flap wheels.  Max operating speed 5,700 rpm

The recommended speed is however lower dependent on the application.

– For grinding we would recommend approx 4,000 rpm

–  For finishing we would recommend a lower speed of 3,000 to 3,500 rpm


Grinder Head Stability

This is potentially a bigger issue.

Angle grinders are designed and built to operate with (relatively) thin discs, up to 10mm thick.  Operating with a wheel 100mm wide is going to put significant twist on the machine bearings.  For this reason we do not recommend using 100mm wide wheels on varaible speed grinders unless they are specifically designed to take a keyway wheel mounting.

The 50mm wide wheels will succesfully run on variable speed grinders


To view our full range of 19mm keyway brushes, click here.

Items which are not in stock are usually available from our main factory within 5 days.