Rafe’s 1911 Build – Days 2-4
So I’m finally getting a chance to get back to Rafe again and the building of his 1911. Let’s all remember that he is in college and also works, so there are a lot of ‘gaps’ in our time together and thus, his progress. Collectively, he’s spent about 9 hours fitting the slide to the frame. He trued the slide on the first day and has been working the frame rails for the past couple of meetings. We’ll call it days 2 – 4.
Days 2-4: The Slide and the Frame; Continued
Rafe did a really good job at truing his slide, so moving on to the frame to see how it would fit would be our next part of the ’slide and frame’ process. I feel it necessary to mention a thing or two about the mil-spec slides, like the one’s you can get from Sarco. They’re inexpensive and they’ll do the job – HOWEVER, they’re not oversized. That means you WILL have to work the frame rails and swage or peen them – unless you have the wherewithal to weld the bottoms of the slide. Yes, that can be done – but it’s A LOT of work. You’re almost better off spending the few extra bucks on a Caspian slide – but if you’re on an actual $$$ budget; elbow grease is cheaper than parts, I guess.
As I’ve mentioned before, there are numerous ways to fit the frame rails. Some are preferred by some smiths, some are preferred by others – but some are the only ’smart’ option. In a perfect world, with perfect parts, all you would have to do is stone the frame rails to the proper dimensions. In that world the slide would slip on with no play – done right, I haven’t even needed oil. That kind of fit is so beautiful it makes baby Jesus cry, hehe.
On our world, that’s not the case. Some would say that truing the slide caused our problems with perfect fit and caused the need to swage/peen…to wit, I would ask; would you fit a dimensionally atrocious slide to a true frame? If your answer is ‘yes’…then I don’t want you working on my guns, hehe. Seriously, some mil-specs aren’t bad and aggressive truing isn’t necessary – but as I said, that was not the case here. The biggest part of this whole ordeal is to teach Rafe how to get it done – so having a ‘worst case scenario’ situation is actually good for him.
I know I’m chasing bunnies a lot – but I realized not everyone may know what swaging or peening the rails means, or what the process is for. Real quick; the end goal is a tight slide to frame fit, right? In cases where the dimensions of the slide and the frame differ to a degree where there’s unwanted play, the rails of the frame have to be ‘moved’ to get tighter against the slide rails. This is done by ’swaging’ or ‘peening’ or both. Swaging is basically ‘dropping’ the rails, pushing them straight down, moving the metal…think of a set of stairs. Swaged rails will have a step down because the rail has been ‘lowered’ or ‘dropped’ to close the gap. Peening is basically ‘bending’ the rails. There’s no step but, rather, a bend – in many cases, it’s clearly noticed. Swaging is preferred because it lends itself to keeping the sides of the frame rails true, while peening effectively reduces the amount of surface contact between the sides of the rails and the slide because it creates an angle to the sides of the rails. That’s the real quick version – I’ll get more in depth at a later time.
Rafe started with swaging. First, of course, he had to figure out how far to go and which slide fitting bars to use. This is done a few different ways, primarily by measurement or feel. I chose to teach him both. Oh yea – you NEED slide fitting bars or you’ll screw the pooch royally. The slide fitting bars are pieces of ground tool-steel that you insert into the frame when swaging or peening. They are there to take the place of the slide and be representative of the amount of play which must be removed. Anyway…using a caliper, he took dimensions of his slide and frame and noted them via a little doodle he made in his notebook. I think, based on that, we were going to have to start with a .114″ bar to get us within .002″ fit. Then I had him install the slide, run it back to the ‘theoretical’ point of lockup, and give it a jiggle. Then, remove the slide and go through all the bars until he found one that felt like it had the same amount of play – that’s the ‘feel’ part. Yep – the .114″ bar seemed like a good place to start.
He installed the .114″ bars on the holder and set it in the frame and readied the swaging punch. Note: Dad’s – TEACH YOUR BOYS THE SIMPLE USE OF HAND TOOLS for pete’s sake!!! Single Mom’s – MAKE YOUR BOYS TAKE SHOP!!! What’s this world coming to? Poor Rafe had to get ridiculed for about an hour because he swung the hammer like a girL. My bad if you’re a girl who knows what you’re doing…BTW, if you are, and you’re single, drop me a line, LOL. Aaaanyway…Swaging or peening is not done ‘gently’, unless you want to be there for 10 years. You should always be ‘careful’ – but you’re trying to move metal. That’s not going to be accomplished with diplomacy and feel-good words, hehe. Use the freakin hammer.
So after I got all that out of my system with Rafe he went to town. Swaging will generally take longer than peening (which is why a lot of guys go right to peening) because you’re trying to move more surface area. Needless to say – as I mentioned above – 6 of the 9 collective hours were taken up by swaging…coupled with my ridicule of his technique, of course. When he turns 21 I’ll have to buy him a beer to make up for it, LOL. Kudos to him though, he takes it like a man and presses on. He swaged a bit and then tried the fit.
Remember – after each swaging or peening process, you’ll have to return the width of the rails back to the correct dimensions. Since it’s not all that much in this go-round, Rafe was able to stone them back. After cleaning, he’d attempt to fit again. If there was play, he’d keep going – back through the process again. Now, I think I mentioned way-back-when, that when/if he comes to a point where he’s going to screw up – I let him do it and don’t stop him (baring something that would ruin the weapon, of course). I’m an instructor, after all, and sometimes people learn better by failure. A few times he’d not stone enough or fail to break the sharp edges and WHAM! – the thing would gall almost instantly. That’s when the metal kind of ‘rolls’ up on itself and creates a kind of ’skid mark’ – it’s pretty bad juju, but not irreparable. When that happened, Rafe would have to almost start over completely – find the gall, stone, re measure everything and get back to it.
On the 4th day, the fit of the slide and frame was pretty good and REAL close. So, I opted to have Rafe peen, instead of swage, the last .0005″ or so. It’s not ‘normal’ to do that – rather, it’s not a ‘usual’ step in the process. You generally do one or the other. However, I made the call because of how close we were to a good fit. In fact, most would have probably left it where it was, it was match-fit – but I’m not most. There was a slight bit of vertical movement which could be felt but not tested with a feeler gauge — that’s pretty damn small, LOL. So that’s where we’re at – he’s using the fitting bars and peening the last little bit out. He only does a few taps, then fits, a few taps then fits – toss on some lapping compound, fit it, clean it, fit it again. I think he’s getting tired of this part, hehe – but he’ll be happy when the thing marks under 1 1/2″ at 50 yards.

Rafe uses an
After he took his measurements, he needed to ‘true’ the rails to a uniform depth. This can be done in a few ways, but it depends on the amount of metal that needs to be removed. It would make very little sense to load the slide up in the mill to take of .001″ of material…it’s just a waste of time. Stones might not take enough and a file might take too much – you have to find a happy medium. Luckily, Rafe’s slide measured out where he could afford using a file and finishing up with carbide paper and stones to clean it up. It was a perfect time to teach Rafe how to draw file…muahahaha. Of course, I’m nice (*cough*) so I let him practice on a piece of steel before I let him go to town on his slide.
Once he was confident and understood the filing method, he put his slide in the vise and started cutting. He cut and measured, cut and measured until he got to within a tiny breadth of his goal. Then he went to a stone to clean up his filing and paper marks…yes, I know the gauge is still in the slide
Of course, not all projects run completely smooth…Rafe decided that he was going to lose one of the tiny screws for the rail gauge…so I made him look for it. He never did find it, so he owes me one screw…I’m still waiting for it