Try reading the Amazon reviews. Sounds like they are brittle, sometimes
they are even broken upon receipt...
Years ago when I serviced printers... GE used what we called graphite
bearings on their dot matrix print carriages. No lube at all. Worked
well but were very brittle. If you happened to drop one on the floor it
would break :(
I've searched for info on these before, nada...
I recall it was a GE Model TN200 Dot Matrix printer, around 1980.
Had two maybe 5/8 inch highly polished bars carrying a 7 or 9 pin dot
matrix ballistic print head. Movement was done using a servo motor, not
a stepper. It was strong, knock your hand out of the way if you weren't
careful. I believe it was 200 characters per second speed. Could get it
with a full keyboard for terminal use.
The only time the graphite bearings were a problem was if somebody
lubed them. Lube was standard on other similar printers so couldn't
really blame the customer. Was nasty to fix though. You could try
spraying Electro-wash in, slide, wipe, spray, slide, wipe, spray... but
you'd get a call back. Needed to remove the bearings and replace them.
Think there were three of them. You could clean them once out but at
that point just cut your losses and put new in...
GE had a whole line of hammer bank/print belt, dot matrix and after I
left laser printers. Company changed from GE to Genicom around the same
time in the early 1980's.
Manual for a really old TermiNet 300 hammer bank/belt printer here:
Yes, I saw that. Hadn't considered them bring brittle, interesting
possibility. Makes sense.
But... Wouldn't the claim they are supposed to be pressed into a
sleeve/block in order to slightly reduce the inner diameter suggest
they are not brittle?
Then again, maybe they are talking about two different products, one of
them a knockoff. Amazon proper sells them for full price, like on the Igus
website. Other sellers are about half price. Would be nice if Amazon would
at least tout their own sales as LEGITIMATE products. No telling where the
others come from.
I read one mention that they broke the insert while trying to press in
place. Also the sizing seemed sloppy...
I usually go straight to the one/two star reviews to find out what
people are complaining about. Sometime it's just shipping troubles or a
cosmetic issue, no show stopper for my intended use.
I mentioned their being brittle due to you intending to cut them down.
May need to use an abrasive cutter to try keeping them from breaking.
Also may not work for your intended use. You have a way of using things
differently than intended ;-)
Amazons business model seems to be make money any way possible. Dissing
sellers by calling or suggesting their products are sub-par wouldn't do
Igus do have quite a good technical help service in my experience on the
few occasions I have put queries to them. They also supply 3D printing
filament in various of their product formulations so you may be able to
use your 3D printer to print what you want.
Nice thought, I do have one, being able to print plastic parts is quite
cool. Someday, metal! But I would not be an early adopter...
Interesting that Igus makes filament. That's very neat. It suggests a
another use for suitable 3D printers.
Mine probably isn't accurate enough, but whatever. I will look at their
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