Slip Fit
A Cartilaginous Lesson in Barrel Bushing Fitting
Admittedly, it wasn’t the best idea, but it was an idea and I didn’t have any others. I was standing alone in the back room of Novak’s .45 shop fitting a 1911 with a Kart National Match barrel and bushing, the latter of which was seized fast into the slide. For those who are unfamiliar, there’s not a lot of purchase area on the lip of a barrel bushing, as it is about as thick as the silver dollars your granddad used to give you, with none of the serrated edging. It’s thin, slick and rounded, and that’s all.
Fitting a bushing to a 1911 involves fitting it to the barrel by turning down the barrel, opening up the bore of the bushing or some combination thereof and fitting the outside of the bushing to the slide by turning it in a lathe and then lapping it in. The delightfully messy lapping process consists of pasting an abrasive slurry with the thickness of mildly aged peanut butter onto a part, installing that part and then making it do whatever it does until those fine, sharp granules in the lapping compound fit the part to whatever it’s rubbing against. Lapping compound comes in grits, just like sandpaper, and also like sandpaper, it breaks down, which means taking things apart and adding more compound. It also means those parts may be stuck together when it’s time to do that, and this is the intersection at which I had arrived.
Wisdom and Muscle
A wise man will install a scrap barrel in the bushing while he fits it to the slide so it can be used as, pardon the pun, a slide hammer to drive the bushing back out the front when it inevitably gets stuck. You will note I used the phrase “a wise man will,” instead of “I did.” Having omitted this critical stage, I was back looking at that thin, slick, round lip of bushing where it stuck out the end of the slide. I carefully oriented the slide muzzle down and gently squeezed the sides of the lip in the vise. Once I had tightened the vise as tight as I felt I should, I pulled upward on the slide, which, as I had expected, was instantly released … as the vise jaws lost their grip on the bushing, which remained loftily ensconced in its new home.
Well, more force works sometimes, so I clamped it in again. Stop it with that definition of insanity; I knew what I was doing. Sensibly clamping the bushing more tightly in the vise, it immediately popped back out of the vise when I pulled on it. After several more laps of clamp-and-free, I decided to get serious and cranked the vise handle down as hard as I could, making certain it would not slip out this time. I took a robust, balanced stance, and gripped the slide firmly with both hands. I should mention at this point I had been lifting weights for about 15 years and had disproportionately strong biceps and the confidence that went with them. I manned up on it with all the strength I had.
Anatomy and Physics
I feel we should talk about anatomy before we move onward and upward. A clever enough fellow can picture the skeletal structure: body slightly bent forward, forearms parallel with the floor, mightily squeezing on the slide, upper arms vertical, joining the forearms at roughly a 90-degree angle. Basic biomechanics indicates that were the forearms to be jerked upward suddenly, they would pivot, turning the 90-degree angle acute as they rotate upward until something impedes their progress. Yes, it’s basic anatomy, and you probably see it coming.
I, on the other hand, was completely surprised when the bushing slipped the surly bonds of the vise, and I promptly slammed the butt of the slide directly into my face. My nose, to be more precise. It’s hard to describe the mix of shock and pain as I staggered backward away from the vise, slide clutched in my hand, having nearly knocked myself out. It was dinner that night before someone noticed the bruising and dried blood on my face. “You look terrible,” he said. “What happened to you?”
I did finally learn how to get the bushing out: You just drive it out from the rear with a long punch. In effect, I suppose my method involved a punch as well, also the steel kind. If my nose had a slight list to one side before, I have never noticed it, so I guess I have it as souvenir. And, of course, the gun. It averaged 1.75″ at 25 yards when I finished it.
For more info: Brownells.com, EGWGuns.com