Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
If by clearance, you mean "sag" in the middle, I'd say that much at a minimum. You don't want to go crazy but the stuff simply doesn't wrap around a screen frame like neoprene does, and you want to make sure you have intimate contact in the area of your film. My AmerGraph 150 has almost that much sag.
Quote from: T Shirt1 on July 22, 2011, 11:41:52 AMI need to find a vacuum blanket for our Armergraph Advantage 150. Amergraph can have them made but it's a four week lead time. I've searched this site and the old one but didn't find anything current. Thanks.steveA suggestion for the future. I've got the same unit, and from the get-go I place some 4" squares of dense foam, about 3/8" thick, on all 4 corners of my frames before lowering the blanket. A couple of layers of mousepad foam would be good, too. I use roller frames with the square bar and that thing has sharp corners that'll probably wear out a blanket in no time. As much as blankets cost, and the fact that I position my frames in the exact same spot on the glass everytime, was why I'm trying to save my blanket if possible. I'm also a cheap bastard.I did something similar when I had a big ol' 60"x80" (+/-) vacuum frame. I put a dense foam, maybe 2"x2", all the way around the inside of the frame. When the vacuum come on, the blanket didn't come straight down along the tubular frame, but kind of angled down towards the glass. That saved me a LOT of money from having to replace the blanket.
I need to find a vacuum blanket for our Armergraph Advantage 150. Amergraph can have them made but it's a four week lead time. I've searched this site and the old one but didn't find anything current. Thanks.steve
This is what I got 5 yrs ago and ordered enough for 2 covers, still on the firsr one. Holds up good and really goes down snug to the screen. Good Luckwww.foamorder.comItem: Neoprene sheet, 51" x 83", Black, 4 mm, with Black nylon backingQty.: 1Price Ea.: $97.20Extended: $97.20
Quote from: sportsshoppe on July 22, 2011, 04:01:40 PM This is what I got 5 yrs ago and ordered enough for 2 covers, still on the firsr one. Holds up good and really goes down snug to the screen. Good Luckwww.foamorder.comItem: Neoprene sheet, 51" x 83", Black, 4 mm, with Black nylon backingQty.: 1Price Ea.: $97.20Extended: $97.20I took a look at that site and I noticed two things, buying eleven sheets or more of the nylon backed stuff cuts the price down considerably and that the plain sheets are really cheap compared to the backed neoprene. Even though plain sheets shouldn't last as long, wouldn't it be better to have a more flexible blanket?
I bought the same blanket as Bluemoon off ebay, got tried of taping holes in my old one, hes right about 60 some odd bucks, but I installed mine with the rubber side toward the glass, fab side up and it work fine. They shipped in a few days