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RE: [TCML] Re: A new guy with a primary threaded through holes



OK but my question was about Lexan (TM) generic name is polycarbonate. I have no trouble gluing acrylic. Joe was working with Lexan.
Rich 

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of jhowson4@xxxxxxxxxxx
Sent: Tuesday, May 18, 2010 12:20 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Re: A new guy with a primary threaded through holes

For bonding acrylic WELDON is the stuff you want. it not so much a glue but more literally a chemical weld. essentially it is dissolved acrylic in a suspension, when you apply it to the acrylic surfaces the suspension evaporates and the dissolved acrylic molecularly bonds to the already present plastic. 
http://www.ellsworth.com/display/productdetail.html?productid=804 

Thanks, 
John "Jay" Howson IV 

----- Original Message ----- 
From: "Richard Schmuke" <rdj@xxxxxxxxxxxx> 
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx> 
Sent: Tuesday, May 18, 2010 11:57:11 AM GMT -05:00 US/Canada Eastern 
Subject: RE: [TCML] Re: A new guy with a primary threaded through holes 

I have a question about the Lexan , I have some 6mm thick that I use in my 
projects , I find I have to drill and tap it for machine screws to get it to 
hold. What brand and type of adhesive did you use? I tried one that was 
supposed to be for polycarbonate but it did not work on Lexan near as well 
as gluing acrylic to acrylic. My coil supports would craze at the joint and 
break. One of my projects is a power supply, you can see it at, 
http://www.flickr.com/photos/kd0zz/ 
Rich / KDØZZ 

-----Original Message----- 
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf 
Of Joe Mastroianni 
Sent: Tuesday, May 18, 2010 8:54 AM 
To: tesla@xxxxxxxxxx 
Subject: [TCML] Re: A new guy with a primary threaded through holes 


One thing I found is that toward the end I was really "manhandling" the 
coil. I grabbed each side of the outer coil at 10 and 2 o'clock, sort of 
like the steering wheel of a car, and I would attempt to turn the thing. It 
took quite a bit of force even to get a millimeter or two. Once I had some 
"slack" introduced to the outer turn the innermost turn would sort of "break 
free" and I could twist it a couple millimeters. 

I repeated this for some large number of hours. Let's say that yesterday I 
started at about 8 AM and net a 90 minute lunch break and lots of coffee 
break time, I didn't finish until roughly 5PM, all of which suggests I am 
probably a man with too much time on his hands. It's a kind of zen koan 
sort of process. Sort of like mowing a golf course with a 22" Sears push 
mower. 

The amount of force I applied consistently and the length of time I had to 
do it is a testament to the strength of the binding power of the acrylic 
cement. Seriously, when it binds it's as if the 2 plastic pieces just 
become one piece. I experienced no give, no cracking, no movement 
whatsoever between the stanchions and the lexan base disc. I am what might 
be called in some circles, a reasonably "large" guy with a rational amount 
of arm strength for my size. I figured if I broke the thing I was no worse 
off. 

It didn't break. Maybe I need to start bench pressing with heavier weights. 

Now that I know how long it takes to do this and the effort involved I am 
not sure I would go through the trouble again, even though the results are 
pretty durned nice. But as you pointed out, it's entirely doable. You just 
need to not have anything else important in your life going on. 

Oh well. Onward to fabricating my MMC and Terry Filter! 


>I managed to wind 50 feet in, then splice another piece to complete nearly 
20 turns of 1/4". I'm sure I could have gone into pages of technique, if 
asked. As you discovered, there only a handful >of us who have succeeded, so 
no one's really interested in technique. At first the whole thing rotates, 
but pretty soon, you become master of scootching. I used Lexan and my glue 
failed >partway into the wind. I unwound the forms a fraction of a turn then 
screwed it into the base._______________________________________________ 
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