George Stratton wrote on Apr 14
th, 2018 at 2:39pm:
I have no idea what they are. Do you have a picture??
thanks, Geo.
Geo
Here's a link to a commercial version sold by PSI - Multimedia File Viewing and Clickable Links are available for Registered Members only!! You need to
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Basically, an inertial sander is a handle with a rotating sanding disc that is powered by the rotation of the piece being sanded. The rotation of the workpiece causes the sanding disk to rotate, and that rotation causes the disk to sand the workpiece. That sounds a bit strange, but it takes about 5 seconds of use to get a feel for how you have to hold the disk against the rotating workpiece to cause the disk to spin, while still allowing the sandpaper to work the surface you are sanding.
Commercial versions offer adjustable angles, and often can accommodate a variety of disk sizes.
But you can easily make one (or several) from scraps of wood, a bearing, and a mandrel to hold sanding disks. The first one I made has the sanding disk perpendicular to the handle (the axis of rotation of the disk corresponds to the axis of the handle). It was a neat project, but proved to be a bit clumsy to use. So I made a second one with the axis of the disk at 45deg to the axis of the handle. That's the one that I use far more often.
If you make one, the key thing to remember is that the disk mandrel has to rotate. I made my mandrels by turning a scrap of wood to a 2" diameter (to match my sanding disks), and attached velcro on one face. I cut a hole the diameter of the outer race of the bearing on the opposite face, and with a bolt through the bearing, carefully glued the bearing into the hole, making sure to not get any glue on the inner race of the bearing. The bolt then attaches everything to the handle.
Capt Eddie has a video Multimedia File Viewing and Clickable Links are available for Registered Members only!! You need to
or
on making an inertial sander with interchangeable sanding heads using a bronze bushing instead of a bearing, and a spherical magnet to hold the arbor/mandrel in place.