Buiffer is usually bigger 6-8", OS (orbital sanders) &
ROS (Random Orbital Sanders) 5 - 6".
OS & ROS sanders have holes in the base, paper does too,
and the cooling fan sucks air through the base - collecting
"some" of the generated sawdust in a cartridge or cloth filter.
Buffers don't need that capability so don't have it.
Buffers often two handers, sanders other than belt
sanders are mainly one handers.
Some ROS have variable speed. Not sure buffers do.
You can get buffing pads for OS and ROS.
On 7 May 2006 13:02:18 -0700, email@example.com wrote:
Orbital sanders are totally different beasts to buffers/polishers - and
I've never seen an orbital polisher.
Polishers are a disk sander mechanism. They have a simple geared
rotation that causes a 6" pad to rotate in circles at around 3000 rpm.
With a rubber backing pad and abrasive they're a disk sander, with a
lambswool bonnet and a polishing compound, they're a buffer. Typically
they're manufactured with a lightweight 9" angle grinder mechanism
geared down from 6000rpm to 3000rpm.
An orbital sander doesn't rotate, it oscillates in a small circle
(coupel of mm across). The mechanism is a crank and oscillating bob
weight, not a rotating shaft.
Although simple orbitals are regarded as crude and prone to making
scratches, they're far easier to handle than a rotating disk sander. Rub
the edge of a dsk sander and you burn a large gouge almost immedately.
Polishing isn't too hazardous, as the compounds are soft and slower
acting, but you still need to be careful to keep that polishing bonnet
flat on the workpiece and not tilt all the load onto an edge.
Cats have nine lives, which is why they rarely post to Usenet.
It is actually the one that is highly recommended to polish pinball
machines. The 4" size is perfect for getting into tight spots and the
orbital movement is important for playfields. I was just trying to
understand why a sander would not work.
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