That's stretching things a bit on safety. You might consider making a simple router table with a piece of ply, with an opening in it. I suggest making it with two pieces of ply, 12mm on top, 18mm below. For furniture, I suggest one meter long by about 75cm wide.. Cut both to the exact same size. Buy the flattest ply you can find. You can take a straight edge with you to check. Small errors will cancel each other pretty much when you put the table together.
Order a router mounting plate and cut a hole in the thin sheet just a hair larger than the plate. It is possible to cut that opening with a router with a spiral bit--more on that later.. Lay the thin ply on top of the thick and mark a second opening about 10-12mm smaller than the top. This will give you lip to set the plate on. Here's a plate from Kreg tools, USA. Perhaps another Aussie member can suggest a better source for you.
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Once you get the openings right, you can glue the two layers together. Spread the glue very evenly on both surfaces. Use screws or clamps to hold them in alignment as the glue sets.
You can run screws up through the lip so you can level the plate with the top of the table. or use Kreg levelers if available. Here's how the screws work.
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If you use a screw, move the arrow in the illustration slightly to the right, coming up through the lip. This drawing shows MDF, but Ply work well and is cheap.
You can use a really straight piece of 2x lumber as a fence. Cut an opening to recess the bit. Given a choice, I'd make a fence with 1x hardwood that is very flat, and attach a second piece to form an L shape. Then cut about a 2 inch opening in each piece for the bit to go in. Wax the whole thing with pure paste wax with no silicon additives, and polish it like mad. This will make your workpiece slide nicely.
One last thing, buy some painter's tape and tape both sides of anything you're going to cut with that circular saw. That will reduce the chipping and splintering quite a bit. Cut through the back side so the up cut of the blade will leave a fairly clean cut.
It's really a pretty easy project, and it will all but eliminate risk with a large bit, and dramatically increase the precision of your cuts.
And welcome to the Forum.
Order a router mounting plate and cut a hole in the thin sheet just a hair larger than the plate. It is possible to cut that opening with a router with a spiral bit--more on that later.. Lay the thin ply on top of the thick and mark a second opening about 10-12mm smaller than the top. This will give you lip to set the plate on. Here's a plate from Kreg tools, USA. Perhaps another Aussie member can suggest a better source for you.
Once you get the openings right, you can glue the two layers together. Spread the glue very evenly on both surfaces. Use screws or clamps to hold them in alignment as the glue sets.
You can run screws up through the lip so you can level the plate with the top of the table. or use Kreg levelers if available. Here's how the screws work.
If you use a screw, move the arrow in the illustration slightly to the right, coming up through the lip. This drawing shows MDF, but Ply work well and is cheap.
You can use a really straight piece of 2x lumber as a fence. Cut an opening to recess the bit. Given a choice, I'd make a fence with 1x hardwood that is very flat, and attach a second piece to form an L shape. Then cut about a 2 inch opening in each piece for the bit to go in. Wax the whole thing with pure paste wax with no silicon additives, and polish it like mad. This will make your workpiece slide nicely.
One last thing, buy some painter's tape and tape both sides of anything you're going to cut with that circular saw. That will reduce the chipping and splintering quite a bit. Cut through the back side so the up cut of the blade will leave a fairly clean cut.
It's really a pretty easy project, and it will all but eliminate risk with a large bit, and dramatically increase the precision of your cuts.
And welcome to the Forum.
. Been using extensively on my campervanbuild.
