Re: [TCML] Cutting Garolite disk

[Joe Mastroianni <joe@xxxxxxxxxxxxxx>]

Thx to all.  

I've ordered the Jasper router jig.  I've got the garolite squares, plus some other pieces.  Actually have 2 sync motors now, both 1800 RPM.  

Generally speaking I've not been extremely lucky with my router (a DeWalt plunge router).   It's the only tool I own that I don't get along with, and I own lots of tools as I've had to nearly rebuild my house over the last 3 years.   I don't know if it's the router or the bits or me.  Probably some combination of both.

If this doesn't work I'm going to twist the wife's arm to let me get a bigger lathe.  Probably a Grizzly.   My little trusty Sherline has been by my side all these years and never let me down, but it's too small for the coiling projects I have.

I'm not sure why the wife is objecting to the lathe, actually.  We spent part of our honeymoon at TechShop in Menlo Park.  We spent our night-after-wedding-night in a 3-hour class being trained on a south bend - class  lathe they have there.  I would have thought she would have jumped at the chance to have our own... She seems to be okay with the coil(s) I'm building.  But once I put in a couple new pieces and the spark output grew to about 3', she started to go a little squirrelly on me.

Joe

On Jun 21, 2010, at 5:26 PM, jimlux wrote:

> Joe Mastroianni wrote:
>> Ok,
>> So I'm making a srsg and I am convinced of the primacy of garolite as the material to use for the disk holding the spinning electrodes. But as far as I can tell my sources of garolite will all provide square or rectangular chunks (eg - mcmaster-carr)
>> What's the best technique to cut a precise circle out of these square pieces?
>> I don't have a band saw...
> 
> Hire someone to cut it for you<grin>
> 
> The key is to make a fixture: Something to hold a pivot (drill a hole in the center and put a bolt/something in to serve as a pivot) and something to hold your cutting device. You can clamp a sabersaw type thing, or use an angle grinder, holding it against a rest, or even use a hack saw.
> 
> Eventually, though what you'll wind up with is a mostly round disk that you can clamp into something that spins it that is firmly bolted down. You can then use a rasp or surform or microplane that is held against a rest or block.
> 
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