AR Sponsor
Posted: 4/21/2011 5:08:22 PM EDT
|
Building my first AR and have everything except some smalls parts. I'm trying to install a YHM 5C2 and I improvised a wood/rubber barrel block but the barrel turns in it when I try to put some torque on the 5C2. I don't have an actual vice, just some bar clamps. I can't torque it much past hand tight like I have it blocked. I need to turn it another 270 degrees or so.
Any suggestions on, or pictures of, a better homemade vise block setup or do I need to buy a vice and or a shim? |
| The molded plastic reciever blocks arent that expensive. You may think you are only buying it for this project, but it will have many uses. Any time I work on my rifles, uppers or lowers, I put them in the blocks. I am referring to the upper clamshell style and the magwell lower block. Securely holds the reciever in place so you have two hands free. Buy once, cry once. |
| Agreed, don't use a reciever block of any style to put a lot of twisting force on the barrel/reciever while installing a muzzle devive. Use barrel blocks. Even a set made from a 2x4 and rubber lined should work (assuming you can get access to a vice to use). Don't take such a great chance on tourqing,rwisting, or breaking the reciever....<><....:) |
|
yep, I bought a set of aluminum barrel blocks for that type of work.
Also if you need to torque it another 270 degrees beyond hand tight, that's way too much torque if you're using a non crush type washer. It sounds like you need a peel washer. Basically a stack of really thin washers held together by what I don't know. I couldn't get mine apart without "cracking" the stack in a vise. I basically flattened the circle a bit. I have rifles with crush washers and haven't ever removed or installed them so take my words with that in mind. |
| to split off the thin sections of a peel washer try using a razor blade (be careful) or hang the peel washer on a piece of wire, a coathanger works well, and heat it slightly by "fanning" it with a propane torch, a Bic lighter may even work. The individual sections will come part....<><....:) |
|
Not trying to start a war here, but in defense of the clamshell blocks, I have put an amazing amount of force on an upper with this system, and never hurt a thing.
In fact, I ended up crushing/ruining a YHM barrel nut for a four rail. The outer ring completely failed. It had been rocksett or locktite in place, and no heat or anything would work. 
|
|
Quoted:
Building my first AR and have everything except some smalls parts. I'm trying to install a YHM 5C2 and I improvised a wood/rubber barrel block but the barrel turns in it when I try to put some torque on the 5C2. I don't have an actual vice, just some bar clamps. I can't torque it much past hand tight like I have it blocked. I need to turn it another 270 degrees or so. Any suggestions on, or pictures of, a better homemade vice block setup or do I need to buy a vice and or a shim? I agree with what has been said regarding "do not use an upper receiver block". I started trying to do work with a dumb little machine vice and aluminum barrel blocks. I could not apply enough force with the tiny vice to hold the barrel in the aluminum blocks (I used an inner-tube as a liner). I finally coughed up the money for a 6" machine vice. I also read here that one guy likes to use leather to line his barrel block instead of leather. I've used on old piece of leather chamois soaked in CLP as a liner, and it seemed to help get a good grip on the barrel. |
|
Quoted:
Quoted:
Building my first AR and have everything except some smalls parts. I'm trying to install a YHM 5C2 and I improvised a wood/rubber barrel block but the barrel turns in it when I try to put some torque on the 5C2. I don't have an actual vice, just some bar clamps. I can't torque it much past hand tight like I have it blocked. I need to turn it another 270 degrees or so. Any suggestions on, or pictures of, a better homemade vice block setup or do I need to buy a vice and or a shim? I agree with what has been said regarding "do not use an upper receiver block". I started trying to do work with a dumb little machine vice and aluminum barrel blocks. I could not apply enough force with the tiny vice to hold the barrel in the aluminum blocks (I used an inner-tube as a liner). I finally coughed up the money for a 6" machine vice. I also read here that one guy likes to use leather to line his barrel block instead of leather. I've used on old piece of leather chamois soaked in CLP as a liner, and it seemed to help get a good grip on the barrel. yer post makes little sense |
AR Sponsor