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Cam lock couplings question

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Cam lock couplings question

Unread postAuthor: ronnieoverby » Mon Jun 09, 2008 2:37 pm

I have seen a couple of pictures of launchers that use those camlock couplings for breech loading barrels.

I don't understand how they couplings are attached to the barrel and to the chamber.

Does the barrel pass through one and the other is just threaded to a fitting on the chamber?

And if the barrel does just pass through, how is it fastened to the barrel?

Thanks
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Unread postAuthor: Maniac » Mon Jun 09, 2008 3:00 pm

Check the wiki next time it okay though here is how it works.http://www.spudfiles.com/forums/viewtopic.php?t=311
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Unread postAuthor: ronnieoverby » Mon Jun 09, 2008 3:05 pm

I have read that before. His photos on top look different than the ones on the bottom. And I don't think it tells how the one is fastened to the barrel.

"This barrel is my breech loading rifled barrel from the SGTC. Notice how the excess fittings have been eliminated for a smooth look. " - HOW DID YOU DO IT BOOGIE MAN??
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Unread postAuthor: Maniac » Mon Jun 09, 2008 3:10 pm

All you do is use threaded fittings to connect them nothing too special. all he did to get that female connector to slide down the barrel was sand off the threads and and epoxy it farther down the barrel i think.
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Unread postAuthor: ronnieoverby » Mon Jun 09, 2008 3:15 pm

Oh ok, cool. Thanks!
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Unread postAuthor: starman » Mon Jun 09, 2008 3:16 pm

Take a look at how I implement cam locks. Ignore the blue tape burst disk on there. The levers on the side of female receiver flip up, you insert the male adapter and push the levers back down locking it in place. Notice the round "groove" around the edge of the male adapter...the levers have a cam in the inside that slides into that groove and locks it in place.

Image

The potato barrel there was made by grinding down the inside of the male adapter some to allow the 1/5" barrel to slide all the way through it. I ground a potato slug knife on the end and voila', a breech load potato barrel. [I didn't invent this BTW, several examples of this on the net]

In my opinion, this is the most versatile way overall to connect barrels. Even offers a simple way to implement a basic burst disk.
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Last edited by starman on Mon Jun 09, 2008 3:49 pm, edited 1 time in total.
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Unread postAuthor: ronnieoverby » Mon Jun 09, 2008 3:22 pm

What kind of fitting is at the end of your chamber?
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Unread postAuthor: starman » Mon Jun 09, 2008 3:48 pm

ronnieoverby wrote:What kind of fitting is at the end of your chamber?


The chamber has a 3" threaded opening, then a 3" to 2" threaded reducer bushing. The female cam lock receiver then has a 2" male thread that screws in to the reducer. The picture shows this pretty clearly.

There are other potential combinations for this. Perhaps you should run down to your local Tractor Supply or Northern Tool and check these parts out for yourself. They are really very simple to use and implement.
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Unread postAuthor: ronnieoverby » Thu Jun 26, 2008 1:10 pm

what size camlock couplings should I get for a 2 inch barrel to slide through?

what about a 1.5 " barrel?
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Unread postAuthor: starman » Thu Jun 26, 2008 1:59 pm

ronnieoverby wrote:what size camlock couplings should I get for a 2 inch barrel to slide through?

what about a 1.5 " barrel?


A 1.5" barrel will slide nicely through a 2" male cam lock coupling, but will require some dremel or drum sanding the inside. If you want a slide-through 2" barrel, your only option is to go to a 3" cam lock and reduce it down on the backside of the male cam lock.

You can make a very nice slide-through 2.5" barrel with a 3" cam lock
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