- [Instructor] There are many processes
in a sheet metal shop that produce sharp edges
or burrs on parts.
Secondly, many of the parts require a cosmetic finish,
like line graining or jitterbugging.
There are four key tools used in the shop
to deburr and finish parts.
The first is the tumbler.
A tumbler is a mass finishing device
that can finish multiple parts
at the same time very quickly.
The media comes in a variety of sizes and grits,
depending on the part size and the tumbler used.
Small parts use small media in small tumblers
and we have a larger tumbler, as well,
with bigger parts and bigger media.
There's plastic media, ceramic media
and it comes in all types of grits and sizes and shapes.
The larger tumblers allow us to tumble larger parts,
as well as use larger rocks and heavy duty machines.
The hand grinder is primarily used to remove the burr
that's left where the laser starts and stops its cut.
This little burr can be quickly removed
with a little hand grinder and quickly process
through the parts.
We can do one at a time or a whole stack.
The jitterbug, or random orbit sander,
can quickly remove scratches that have been added
to the part through the manufacturing process.
It produces a nice, even surface and it's quick to do.
We can even use it to remove any sharp edges
that might be remaining on the part.
Different finishes can be produced on the parts,
depending upon the sandpaper used in the sander.
Using a line grainer, or a wide-belt sander,
we can quickly add a grained surface
to the top and bottom of our part.
We can load the material through the machine
and we can run the part multiple times through the machine
to get the desired finish we want.
The sanding belts come in a variety of grits
to get the desired finish we're looking for.
The final parts have a uniform, line grained surface
that's very cosmetic.
You can find it on kitchen appliances
and many electronic enclosures.