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3M Radial Bristles (was Contact Lenses)


#1
    Jessica, check to be sure you have mounted the bristle brushes
so that the leading edge of the wheel is the curve of the arms
rather than the points.  When correctly mounted they wear
exceedingly well and rarely "fly off".  I use them mounted 5 or 6
on a mandrel and it takes a very long time to wear them down to the
hub. 

Thanks Pam for the suggestion - I actually have made the mistake of
mounting them upside-down in the past, but not any more…and they
still seem to wear very quickly! At least the yellow ones (most
abrasive) do for me…I usually only mount them one at a time because
I use them most for very small work; i.e. getting excess solder out
from under a tiny hinge in a spot that’s difficult to access. Perhaps
the problem is in the fact that I’m using a Dremel multi-pro rather
than a proper flex shaft? I know that when I use a proper flex shaft
the wheels do seem to last longer and operate more effectively. Which
leads me to realize I need to seriously consider an upgrade…rats!

Anyone else had trouble making the 3M Radial Bristles last?


#2

Hi Jessica, I’ve found that using too much pressure against the
bristle wheels seems to make the bristles separate from the hub. I
have also mostly had problems with the yellow wheels. I suspect that
since it is the most aggressive (most coarse) wheel, it may be
tempting to be a little more aggressive with the amount of pressure
put against it. Once I see a bristle come off, I take it as a sign
I’m pushing too hard and back off a bit. Seems to help. You might try
that and see if it helps out.

Best,
Mike Dibble
Black Horse Design
www.black-horse-design.com


#3
    Perhaps the problem is in the fact that I'm using a Dremel
multi-pro rather than a proper flex shaft? I know that when I use
a proper flex shaft the wheels do seem to last longer and operate
more effectively. Which leads me to realize I need to seriously
consider an upgrade...rats! Anyone else had trouble making the 3M
Radial Bristles last? 

Any abrasive will wear down with use. Compared with standard
silcone rubber abrasive wheels, the bristle disks last a lot longer.
But it’s not reasonably to expect these to stand up to long hard use
without wearing down.

On the other hand, if you’re using your dremel at full speed, then
you’re likely got getting the most efficient use of the disks. They
seem to run best for me at the lower end of the rpm range, say around
5000 rpm or so. Also, I note that the smaller sizes, being more
flexible bristles perhaps, seem to last longer than the larger ones.
The 1 inch brushes seam to wear away slightly quicker than the mid
size ones.

Also, don’t equate wearing out with breaking in a bit. The don’t
stay looking new very long, but then, after wearing a bit, last quite
a bit longer like that before being worn down too much to use.

Peter


#4
Anyone else had trouble making the 3M Radial Bristles last? 

I discovered early on that if I used them singly, they wore down
rapidly, but by using them in multiples they do last a fairly long
time. Also they work better and last longer if you don’t put
pressure on them but let them do the work for you. I generally use
mine 3 to 4 at a time.

Kay


#5

Kay, I like the bristles very much but have learned that one has to
use a very light touch with them. They are not meant for any
pressure and will last longer and work better if you barely touch the
outer part of the bristle to the work. Much the same as the bristle
polishing brushes…let the ends of the bristle do the work.

On the other hand, I have had some problems with the wheels
deteriorating. I had a sample box in a drawer and forgot about them
for perhaps six months. I stumbled on them one day and started to use
them. Some of them, the browns and reds if I recall correctly,
simply crumbled while the blue and yellows were just fine!! Guess
some of them have a short shelf life!!

Cheers from Don at The Charles Belle Studio in SOFL where simeple
elegance IS fine jewelry! @coralnut1