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| Need vacuum clamp advise. http://www-.luthiersforum.com/forum/viewtopic.php?f=10102&t=2351 |
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| Author: | Dave Rector [ Sat Jul 02, 2005 6:15 am ] |
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Hey guys, can anyone tell me what thickness of latex sheet you are using in you vacuum jigs? I'm talking about things like the jig used to glue down a bridge, or the large frames used for vacuum clamping your top and back braces. Is 1/64" material too thin, is 1/8" material too thick? |
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| Author: | crazymanmichael [ Sat Jul 02, 2005 6:19 am ] |
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i use 1/16". |
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| Author: | Sylvan [ Sat Jul 02, 2005 7:34 am ] |
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More importantly is to use silcone rubber. The glue will not stick to the silicone. This is not a problem for a while but, over time, regular rubber will react to the glue. I have been using my silicone rubber vacuum press since 1992. Never had to replace the rubber. This was not my idea but Richard Schneider's - one of the best guitarmakers I have had the privilege to know. |
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| Author: | Steve Spodaryk [ Sat Jul 02, 2005 2:47 pm ] |
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I think the LMI rubber is 1/16". I'm not sure the thickness is critical, because we improvised a uke bridge clamping fixture with a latex glove. Not the most demanding application, but it worked great. Caveat - I ordered some silicon rubber sheeting from McMaster-Carr in the .020" thickness and it was too porous - my vacuum pump could pull air right through it. Might have been a faulty piece - the .040" and .060" worked just fine. |
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| Author: | Don Williams [ Sat Jul 02, 2005 11:04 pm ] |
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Good advice given. I use regular rubber sheet, but will be replacing it with silcone rubber. Glue does stick to the regular rubber, so not the best option, and it will eventually dry out on you. |
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| Author: | Dave Rector [ Sat Jul 02, 2005 11:13 pm ] |
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Thanks for the tips guys! I just found a source that had the latex for about $15 for a 36x36 sheet and thought I might try that out. Last time I looked, the silicon from McMaster was a little pricey. I can't even remember how much it was but it seemed like it was too high to waste on experimental jigs and such. Can you tell I'm on a budget? We are dealing with a contractor trying to get a new house and shop built. That means I have to watch the pennies for a while. |
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| Author: | Brock Poling [ Sun Jul 03, 2005 11:14 am ] |
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I think you can use virtually anything. If it craps out, just replace it. Take a look at some of those vinyl table cloths, I bet they would work too. |
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| Author: | Don Williams [ Sun Jul 03, 2005 12:20 pm ] |
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Even thick plastic sheets will work...you just need to be able to creat an air-tight seal, and have the material not allow the vacuum to pull air through it. |
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| Author: | Dave Rector [ Sun Jul 03, 2005 10:43 pm ] |
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Thanks for the advice guys. Maybe I'll go ahead and get a 36x36 square of the cheap stuff and give it a whirl. |
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| Author: | crazymanmichael [ Mon Jul 04, 2005 1:29 am ] |
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you can get 1/16 silicon sheet on ebay for about $17 for a 36"x36". it is bright red though. |
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| Author: | Dave Rector [ Mon Jul 04, 2005 4:57 am ] |
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Thanks CMM! I'll check that out. |
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| Author: | crazymanmichael [ Mon Jul 04, 2005 6:12 am ] |
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sorry dave... just not thinking! have a look here: http://cgi.ebay.com/ws/eBayISAPI.dll ?ViewItem&item=7528179801&rd=1&sspagename=STRK%3AMEWA%3AIT&r d=1 |
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