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Old 05-25-2006, 08:31 AM   #1
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Default Heat Shield... crap!

Well i made my heat shield the other day and it looks like crap. the plastic i bought dind't want to cut, just shatter. i was able to work with it enough to get it on the car, so its functional... but i need to rebuild one...

anyone have any sugestions on what material to use?
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Old 05-25-2006, 08:48 AM   #2
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What kind of plastic did you use and what do you have available to cut it?

I know that a number here have used regular lexan (plexiglass) from Home Depot or Lowes.
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Old 05-25-2006, 09:00 AM   #3
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well I went to Home Depot but i bought the cheaper stuff. so its probibly low grade.

I work at a plastics R&D place, so we have a lot of tools for working with plastics. i used a band saw with a carbide grit (medium) blade and a wet saw (or tile saw) with a medium grit carbide blade. even when drilling holes in it to bolt everything together it cracked like crazy...

so the Lexan is the way to go then...
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Old 05-25-2006, 09:17 AM   #4
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I used acrylic (thin) and it tried to crack o me. But I only used acrylic so I could laser engrave it easier.
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Old 05-25-2006, 09:26 AM   #5
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I have found a Rotozip helps with the Lexan, Plexi, whatever stuff.

Also heating an area you are about to drill may help.....drill in reverse will take longer ...typically doesn't crack though.
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Old 05-25-2006, 10:54 AM   #6
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Quote:
Originally Posted by BillBoost37
I have found a Rotozip helps with the Lexan, Plexi, whatever stuff.

is that what you are talking about?
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Old 05-25-2006, 10:58 AM   #7
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Gosh ...I use standard bits...

probably the wood/whatever one.
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Old 05-25-2006, 11:01 AM   #8
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ya, ignor the fancy bit thing but thats the tool then, ok. gonna try and do this second one right!
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Old 05-25-2006, 11:09 AM   #9
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I have the older corded version...be careful of battery tools... might not be all it can be
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Old 05-25-2006, 12:37 PM   #10
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i have a good dremel tool, i wonder if i can get a good bit for it that will do something similar.
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