The table top
The plate has a diameter of 500 mm, so the thickness ought to be 19 mm (for the plate of our coffee table).
Roughly mould, saw, cut the table top, which means in this case just under the mark drawn with the compass.
If you do not have a jigsaw or any other machines, you can use a frame saw and narrow jigging blade alternatively. We also offer compass and compass heads.
The base and base plate
The base (multiplex, chipboard or MDF) is the basis for the circle sanding jig.
Besides a base plate (multiplex, chipboard or MDF) is needed on the base as a sliding arm.
The sanding block
We now need a sanding block. It can be made out of chipboard, e.g. a 38 mm chipboard or massive wood. Glue sand paper onto the large side of the block. Apply glue to the block and clamp it for about 30 minutes, using an extension (you can also use spray-on-glue or adhesive sand paper).
You may choose a coarse block for the rough grinding and a fine sand paper for the finish grinding. When exchanging the block during work, you should mark the position of the block in order to not change the diameter, e.g. two blocks with exactly the same dimensions and bolt holes.
The width of the block should be chosen so you can turn it once the sanding paper is no longer sharp enough. This way you can make use of the entire sheet of sanding paper.
The stop bar
Finally a stop bar is needed, also made out of chipboard or massive wood. It has to be thinner than the base plate. E.g. a plate of 16 mm if the base plate is made out of 19 mm chipboard.
The base plate has to be connected to the base with a smooth dowel or cylindrical pin. Then fix the sanding block.
Now adjust the necessary diameter with the stop bar. Measure the distance from the centre of the bolt to the sanding block. This distance has to comply with the radius of the necessary circle. The stop bar will be screwed on the left angle of the base plate.
Sanding the table top
The table top will be applied to the bolt and turned until the base plate rests against the stop bar.
The bolt can be made out of a dowel or a cylindrical pin, this will ensure even more accuracy. Just drill a stud hole into centre of the table top. In our online shop you will find suitable drills, e.g. wood twist drills made out of carbon steel.
Plug the dowel into the stud hole and cut it flush with a flush-cutting saw. Then you can veneer, paint or varnish the plate.
If you wish to grind a plate which has already been veneered you may use the hole of the dowel as accent. A piece of solid wood used as an inlay is a real eye-catcher. We also do offer exquisite kind of woods.