Top 3 Ways To Weld Caps on Tubing (Fab T&T)

today we're going to go over the top three ways on how to put a cap on your application project welcome back guys and thanks for chiming in if you enjoy this fabrication tip please hit that like button so we're going to go over the three top ways on how to put a cap on your fabrication project to start off with the three primary reasons why you would want to cap your project number one is strength when you cap something if it's going to be in a high impact area it is going to box that tube in whether it's a round tube or a square tube number two is aesthetics maybe you have a corner joint where you're not able to do a miter cut and you have an open end and you want to finish that off and making it look nice and clean or it's just an into but you want to cap it off and round it off number three reasons you'd want to cap your tube off is longevity of your part cap and your tube off is going to seal it from the elements from getting moisture and just crud in there and rotten it out from the inside so let's get started with our three different ways number one is our outside cap now the most common mistake when making your top cap is going to be once you get it all cut out and get it set on there it's all nice and lined up you just go to run a bead over it executing it in that way is going to cause you a problem in two of the main reasons one in the strength and one in the aesthetic once you get this all welded up you're gonna have these nice little beads sitting on the outside of your plate the problem with this is most people are going to want to do some grinding and some finish work and as soon as you grind that weld off you've just taken away all the strength that you applied to begin with so I'm going to give an example here of some impactor fatigue and after a few smacks with a hammer you can see a crack starting to occur on the edge there okay now for the proper way to execute our top or outside cap Bevell or chamfer all four sides at about a 45 degree angle leaving a slight landing at the top of the tube repeat the same process on your cap assemble both the cap and your tube with the bevels facing towards each other this will create a nice valley for your weld to land to allowing you to surface grind without removing the weld in its entirety but leaving you with a clean strong finished outside cap the second way is an inside cap so this guy it's gonna be super useful if maybe you have that corner joint here and you weren't able to do a mitre cut and you want to put a cap in there but you don't want it sticking on the outside so you want it something that's flat so you get a nice clean finish so you're gonna cut yourself an inside cap now this can be tricky because you're gonna put this guy in here and you got to try to hold it in there and you drop it while attacking it a quick little trip trick you can do for that is take your ticker on and tack you take her out to it [Music] or a piece of something whatever with whatever type of weld you might be using and then you can use this to hold that guy in place well you go and get a tack on now the same mistake can be made with this in knotch chamfering or beveling the edge of both the plate and the inside of the tube granted the inside of the tube is going to be much more difficult to do in this case because you can't necessarily get your flapper disc or your grinder in there so it's going to be even more important to get that plate beveled out want to look something like that okay now that we've got our top cap and our inside cap we got our third and final way I'm not exactly sure what to call this but I'm going to call it our top fill it cap now this is my preferred way to cap things in most scenarios how you're going to go about this is you're going to cut your cap so that it fits not inside and not to the outside but on the top without falling in and then you get that fill it which you can see right there and that fill it's going to follow all the way around and there we are and as you can see this is with no cleanup we just have a nice clean kind of rounded edge I kind of prefer this I like just the kind of raw look where you can see the welds sometimes but you can also take and just round all these corners over real well and these are going to round over faster - because you're halfway there you got that nice rounded profile these methods are not confined solely to square tubing you can use the same principles on any sort of round tubing as well so thanks for tuning in guys hopefully this was helpful make sure that if you use your top cap or your in side cap method you bevel your cap so you get a nice good penetration weld especially if you're going to be granting that weld off and finishing it so subscribe so you don't miss next week's fabrication tip and tutorial and go build some yes [Music]

Channel: AM Custom fab

Views: 52,143

Keywords: welding, fab t&t, tig welding, welding tips, welding tricks, how to weld, fabrication tricks, square tube, mig welding, welding caps

Id: tF-SX_E_6Ws

Length: 6min 21sec (381 seconds)

Published: Fri Apr 10 2020