Anyone have part numbers for SS tubing and the other tubing that fits over it? Do I use an arbor press to join?
I use SS tubing that is .180 ID x 1/4 OD, seamless I find that the tolerances vary so you might get a tight barrel.. or not. I also use 1/4 ID x 5/16 OD SS Tubing for the barrel collar. We found that soldering it with silver solder/ silver flux worked very well. If done right (I didn't do it of course) they look like they were made in a factory... very smooth with almost no evidence of the solder. I have used them since Nats 2013 without a problem. ** Note - I call to make sure its all in the same warehouse otherwise they charge shipping for each part of the order that comes from a different warehouse. McMaster Barrel - McMaster-Carr Collar - McMaster-Carr Have a nice day!!
Interesting. Normally JB Weld or CA glue or any other type of adhesive has failed. Is this glue or putty? I wonder if it would work in filling the gap on my bronze bushings that is very small... yet allow me to remove it later? I read the tech sheet and it didn't list the type of materials it would work with. Are you sure it would work with Stainless Steel?
This is an anaerobic retaining compound, which is different from CA and also thread lockers. I'm not surprised that CA fails for this application. I suspect that JB weld fails because you can't get enough into the small gap. The 680, and most of Loctite's newer products, work with inactive metals like SS and aluminum. From the data sheet: "LOCTITE® 680™ is designed for the bonding of cylindrical fitting parts, particularly where low viscosity is required. The product cures when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage from shock and vibration. LOCTITE® 680™ provides robust curing performance. It not only works on active metals (e.g. mild steel) but also on passive substrates such as stainless steel and plated surfaces. The product offers high temperature performance and oil tolerance. It tolerates minor surface contaminations from various oils, such as cutting, lubrication, anti-corrosion and protection fluids." It should also be good for normal bronze. However, many bushings are oil impregnated and I don't know if that would cause it to fail. It does have some oil tolerance. To separate parts you just heat it to 250 degrees C, which generally requires a torch.
I know we all like to tinker and build things, it's part of the hobby, but dont forget to support our local manufactures like BC and Strike as well..... I know BC sells them, not sure about Strike. Will save a lot of time if in a hurry.
I ordered and received 4 guns from Strike. Mixup with the order and did not get SS barrels, so I am making my own. BC does not sell Foster breech guns.
Did you let Stephen know of the mixup? Also, my apologies on behalf of Strike for that. Let us know what we can do to make it right.
I've been using Loctite green for a lot of stuff. It wicks into tight fitting joints very well. Will have to give the 680 a try.
So in the build thread of the cannons, o-ring is listed as: Smallparts.com o ring ORB008 Still the best option?
Smallparts got bought by amazon a few years ago and went downhill. I think they are splitting the remainder off as part of a sub-amazon company. Anyway they changed all they item numbers so finding parts, especially springs, is a pain. For O rings I haven't had any issues with the ones you get in the plumbing section of home depot. I want to say #36 but that's probably wrong so check the dimensions.
This stuff is stupid strong... for those that can't sleep at night, it can help to rough up the ID and OD of the mating parts a little bit. I have never had it fail if applied properly to clean parts, even in an industrial setting. I have used it to retain bearings in bores that were intended to be a press fit but were accidentally cut oversize. When it came time to press the bearings back out, the press fit ones came out as expected, but the ones held in with the retaining compound took about 3 times as much pressure on the press to break them loose. That exercise really built my confidence in the product!
I also bought 7649 primer, just for the piece of mind McMaster-Carr 7649 1.75-oz. Bottle Green 7614A16 19.06
If it doesn't stick well then its perfect I just need it to fill a gap. Thanks for this great information! I already ordered some to try out but based on the reading.. it will work with no problem. Thanks again!
#36 O-Ring at the hardware store but they don't use that system at McMater Carr I will have to go measure what I have and find the part number. Its been a while.
-008 is correct: 0.176" ID and 0.070" thickness Or your hardware store will probably show it as 5/16" OD, 3/16" ID, 1/16" thick.
