I replied long ago when this first came up. If you have a radial arm saw
it's simple. Clamp the workpiece in place under the blade, lock the
carriage in the proper location, start the saw, lower the blade to the
desired depth, unlock the carriage swivel, and rotate the carriage slowly
to form the bowl. This method is limited to the radius of the available
blades. You could also get fancy and, once the bowl is formed, lock the
carriage swivel and move the blade along the arm to make an oval, locking
and spinning the carriage again when you get the oval as long as you want.
On February 10, 2019 4:02:04 PM Randall via Shop-talk
<shop-talk@autox.team.net> wrote:
> Hmm, looks like the list server is stuttering again. I got Phil's reply,
> but not the original post.
>
> Anyway, if you had some way to guide the piece, I might try doing the table
> saw trick. But it would have to be a very shallow cut, repeated several
> times to get 1/2" depth. A good carbide wood blade will cut sideways, but
> only to the depth of the carbide inserts.
>
> Probably also not that hard to rig a wood lathe with the swing you need.
> Maybe mount a cheap bench grinder so one end hangs off the edge of the bench
> (giving you somewhere around 7' of swing) and drive the other end. Main
> difficulty with that is setting up the belt (or gear) train to turn it
> slowly enough. I've got a DC motor from an old treadmill that would
> probably do the job, combined with a decent (load sensing) electronic speed
> control.
>
> -- Randall
> 56 TR3 TS13571L once and future daily driver
> 71 Stag LE1473 - awaiting engine rebuild
> 71-2-3 Stag - awaiting gearbox rebuild
>
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