How I squeese 100% out the flap disc

hello this is a new flap sanding disc

that consists of pieces of abrasive cloth

stuck to a backing layer

and this is what a worm disc looks like

where more than 50 percent of the disc has not been used

this uneven wear is caused by

the abrasion of the disc mainly on the outside

the first reason is the grinder's mounting pin protruding beyond the disc

which does not allow the disc to be set parallel to the ground material

but only at an angle

some probably came up with the idea

to put some kind of washer and eliminate this drawback

it will be of little use as the outer will travel a longer way anyway

and will wear out faster

a third reason is to use the grinding wheel with the outside

for internal corner welds

when the protruding flexible part of the wheel has worn down

the wheel is not suitable for the purpose

because the backing layer abstracts the grinding

how can i quickly cut the backing layer

without removing the disk from the grinder

on youtube you will find a video in which

the demonstrator uses a piece of metal

with a sharp edge held in a vise

perhaps it will work with a disc with a plastic back layer

but in the case of an ordinary disc

metal does not work for me

so for this purpose i use more durable recycled material

this is a corundum disk worn down to a diameter

that does not allow it to continue to work with the grinder

instead of throwing it away

it can still be used to extend the life of the flap disc

i do it this way

instead of corundum

i use a piece of used whetstone in the same way

remember to wear a mask goggles and earplugs when working with the grinder

sanding the fixing layer must be skillful

so as not to tear off descending flaps

this can happen when the fixing layer is trimmed too deeply

or the adhesive has heated up for a long time

we now see flap disks

in which i have trimmed the securing layer

this is the disc that could be used in hundred percent

some discs cannot be cut completely

because the friction layer is not fully glued

can anything be done with this stub?

i'm silvestro

thanks for your attention and i invite you

to like and comment on the video

subscribe to my channel and watch other films