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Thanks for all the messages and feed back from everyone.

Forgot about height. Updated the drawing: http://thenerdfarm.com/zenpw/Barrel-Clamp.gif

I was thinking aluminum would be acceptable.
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I am building a rail gun (see links below for more complicated examples than I'm building) and need someone to build three barrel clamps for me.

I have all the measurements except the size of...

That sounds like a fun time, was that in F-Class? I have a friend who keeps trying to get me to shoot with him in F-Class but I'm really having a fun time with the smaller stuff this summer. Maybe...

Whoa. Whoa. Whoa.

That picture is not me or my rifle. It's an example of what I'd like to do.

I wish I could build something like that.

For this experiment, yes, I'm married to this rifle and this barrel. If I was doing this for 'real' I'd probably go with 6mm BR in a Pierce action.

Good info and thanks, everyone! I should have been more clear.

The rifle is a Ruger 10/22 (.22lr) with a heavy 18" bull (.920 muzzle to breech) barrel so recoil is very minimal. I have a drill...

I'm building a rail gun kinda, sorta, similar to the one below. The barrel is .920 in diameter. My question is how big should I make the whole in the clamp? .921?

Thanks for any guidance!
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I normally build these myself but my brake isn't large enough for these.

I need two (2) trays made that will hold batteries for an electric motorcycle.

They probably shouldn't be any thinner...

Thanks for all the great feedback. I really want to build this thing for the experience. But after reading all you're posts I've come to the conclusion that you guys are right. I should just buy one....

Thanks for the feedback, Ron. I'm busy doing day job stuff (to pay for the trailer) so I haven't read your suggestions indepth yet but will soon.

Quick question: Is my truck wheels/tires idea...

I'd like to hear from the experts about my motorcycle trailer design I've been playing with. I need a small trailer to tow my race bike to the track and after poking around the net and talking to...

For a head of cabbage I'm very old. For a mountain I'm very young. For a man, I'm just right.

I crack me up.

Yeah, I squeezed the trigger early on that one.

That may have been true in the '70's but not so much in 2007. You're average EV now hits 70mph with no problem and can do 30 or so miles before needing a recharge. So speed isn't an issue and...

Yes it does move the pollution somewhere else. It moves it to a central point where we can keep better control of it. One coal fired powerplant or 10,000 cars. I'll go with the powerplant.

If...

Apparently so. ;)

Really? That rocks. When I get done with my current project I'll have to check those out. Thanks for the update!

Thanks Bruce! That's very cool!

Blender's not a CAD program really. It's a 3D modeling and animation program for doing characters, spaceships and that sort of thing. If you try doing CAD in Blender you'll just get a headache. ...