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Post by zalexander on May 25, 2015 15:22:00 GMT -5
Maybe this should be a sticky at the top of the building tips page. It is a huge resource for anybody doing a bedding job.
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Post by Richard on May 25, 2015 20:14:57 GMT -5
Bill.............excellent job!............BTW, did you have a secrete camera embedded in my shop? Richard
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Post by deertroy1 on May 25, 2015 20:31:59 GMT -5
What can I say. Very good post!
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Post by schunter on May 26, 2015 10:53:19 GMT -5
Thanks Bill. You go to great detail in your work and it shows in the finished product.
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Post by Dave W on May 26, 2015 14:01:21 GMT -5
If it does not go to the Tips section, bookmark the thread and it is always at your disposal.
Nice post Bill!!
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Post by cuda on May 27, 2015 7:30:24 GMT -5
Nicely done! Would the JB Weld work the same way?
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Deleted Member
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Post by Deleted on May 27, 2015 7:53:56 GMT -5
Yes it should
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Post by rossman40 on May 27, 2015 10:38:16 GMT -5
JB weld is a bit thinner then Marine-Tex or Devcon putty. It has a 25 minute work time but the actual "set" time (where it doesn't move or flow) is like 4 hours. You can mix it, put it in place and think you got it at the 1 hour mark but come back at the 2 hour mark and find it has ran or flowed out of where you wanted it. It will also show air bubbles easier. Just takes a different technique working with it. I still use it to bed scope mounts because I think it sticks to metal better.
With Marine-Tex you want to use the gray, it is a bit tougher.
I'm with Bill, it's tough to beat the Devcon aluminum putty. I'm using the steel putty right now but will switch back to the aluminum. I would like to use the titanium with it's even higher compressive strength but your looking at 35% more cost at least.
When you heat up the Marine-Tex or Devcon use a hair dryer or heat gun on low. You want it around 120°, you get over 150° and it instantaneously sets up. Also with the Devcon if you read the tech sheet, to get maximum hardness, you want to bake it after setting up for 2 hours. They say 200° for 4 hours. I set up a little oven and go for 150-180°. If you go over 200° with a wood/laminate stock your forcing that little amount of water out of the stock and then it will suck it back in maybe unevenly (warp).
One thing with the Devcon products, they are mil-spec. If you look at the tech sheet they not only give you the physical properties but also the ATSM test that was used to come up with that number. It's easy to come up with a number like Adhesive Tensile Shear strength but unless you know which of the couple of dozen or so test methods they used the number they are spouting could be 300% of what they would come up with using another method.
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Post by 7mmfreak on Jun 1, 2015 21:49:22 GMT -5
Also with the Devcon if you read the tech sheet, to get maximum hardness, you want to bake it after setting up for 2 hours. They say 200° for 4 hours. I set up a little oven and go for 150-180°. I do most of my bedding this time of year if I can help it for a couple of reasons. One is the "baking" you mention. The other is, I place fiberglass stocks in the baker for about a week prior to bedding to ensure all the resin is completely set up. I just use a car trunk, cab, or attic though. It gets plenty warm for that down here for that. I also do my bullet coating this time of year in bulk in a hot garage for the same reason.
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