Flap disc wear

[dr_clyde]

Sounds great, but when you think about it, that would be over 80 cuts with the zippo. He must have a lot of patience and free time


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You do it while the disc is spinning. Takes seconds. It's an advertised feature of a lot of new flap discs, they call them "trimmables".

 

[tarbellb]

Consumable, yes, but learning to dress a wheel is also important.

Flap disc typically stop cutting on the outer edge, take it to a sharp edge and cut down the outer portion to fresh material.

This is why some of the newer disc out there are made of plastic, they are meant to be cut back for better performance/life.

See Walter disc for example

Quoting myself feels funny...

 

[2oolhound]

^^^^^ EEEEHE HE HE! Had to try it! ^^^^^

When belly aching to a dealer about the cost of 7" flap discs he told me "Oh no, you just take a real sharp zippo knife and cut off about 1/4" of each flap and they're like new again" I've never tried it. I have rotated them in front on my 10" bench grinder though and chewed a new edge on them.

The way this dealer described it you cut each flap 1/4" on it's length. This is not the edge of the disc which will reduce the diameter of the disc. You can't do it with the disc spinning. You could buy another new disc by the time you did that job.

 

[dr_clyde]

^^^^^ EEEEHE HE HE! Had to try it! ^^^^^



The way this dealer described it you cut each flap 1/4" on it's length. This is not the edge of the disc which will reduce the diameter of the disc. You can't do it with the disc spinning. You could buy another new disc by the time you did that job.

Yeah that guy is an idiot then. No way is that worth the time.

 

[Kev442]

Which is why I'm contemplating torching off the exposed paper and hoping the grit survives, kinda like woodburning. Probably will just loosen all the glue and turn it into a fragmentation grenade...

 

[tarbellb]

Which is why I'm contemplating torching off the exposed paper and hoping the grit survives, kinda like woodburning. Probably will just loosen all the glue and turn it into a fragmentation grenade...

What? No! Put the torch down and walk slowly away.

Go over to a sharp edge and remove the backing material by shaving it off using the grinder to spin it. You may need to take some of the abrasive as well if its been severely clogged....

The idea is to expose fresh abrasive material.

BAM, a flap disc that cuts again.

Watch this guy, he dresses a Walter disc at 4:45 in-

You can do this with any disc, just the Walters (and others) are easier.

 

[sberry]

I can actually sand to some extent and finish well with a common 1/4 grinding wheel. I send some with a sander, usually a 7 inch. I bought a flap or 2 and still havnt used one.