A collection of posts often on colt E- and I-frame revolvers: pythons, model 357s, officer model specials, etc. Topics not limited to: action jobs, fixing Bubba-gone-wrong gunsmith mistakes, and revolver porn. And sometimes I'll wander off the reservation and type random nouns and verbs that have nothing to do with our sole purpose, because who the hell can really pay attention that long?

Sunday, June 28, 2009

micrometer party!

I'm getting old enough that I get more and more credit for what other people I work with do. In this case, I won a prize that came with a check.

We drank some of it, but now I'm going through buying as many different high quality (yet inexpensive w/ high rated sellers) micrometers as I can.

Currently on bid: helios, brown&sharpe, starrett, tesa. Already have mitutoyo. I can't seem to find a cheap etalon (go figure).

Anything in particular I missed?



Friday, June 26, 2009

lathe is up and running!




The electricity guy came out today. Lathe now works!

Not super accurate, I'm getting .001 variance at two ends of a 4" cut. I think it's b/c it's not level (yet) and the chucks are not very high quality. Hopefully.

Good solid clean lathe otherwise. The only issue is that the belt is starting to tear a bit.

We shall see how well it cuts bushings...


Thursday, June 25, 2009

Trip report: Frank Glenn gunsmithing lessons


I flew back Saturday after going to work with Frank Glenn on colts, mostly to learn how to eliminate endshake. In general, it's what you don't know that you don't know that causes the most harm, so having someone that knows what they are doing can be priceless.

  1. If you don't know an area it's very easy to do something stupid that seems fine. An example from when I picked up a file for the first time a while back: filing by sawing back and forth! Never occurred to me that it was wrong, and it's so stupid most gunsmithing books wouldn't even think to say "don't to that!"
  2. It's easy to have assumptions you don't think to check that will make things very hard. An example from this trip: I thought a gun had an endshake problem b/c the cylinder would contact the barrel, when in fact the factory had simply filed the barrel unevenly, leaving the right end too high. Didn't occur to me that a fairly pristine gun from the 50s would have a factory issue. Trust nothing (or "check everything") otherwise you'll get really confused.
  3. There's one real book on colt DAs and it's missing a bunch of stuff, unfortunately. (Dfaris stop writing fiction and do an update!)

In any case, the regime was simple: I flew out 4 colts with alleged endshake problems, my dad drove down two that weren't working, and I spent three days getting through them with Frank. I also learned how to curve the sear on a trigger using a torch so that you can eliminate stacking.

What we have to work with




Here's my initial four (dads' are not pictured). A really nice handling old style 357 trooper, a bull barreled python, a snub python, and a 1957 python that someone jacked up the front sight on and sold the checked grips:



All were selected to have endshake issues: excessive play or, worse, direct contact of the cylinder and barrel face.


Wednesday, June 24, 2009

emco unimat 3, compact 5 cmc, and south bend links.

I got all three machines, so this is a placeholder for useful links.

Unimat 3:

compact 5:
Quality chucks:

Monday, June 22, 2009

useful dfariswheel post on ultrasonic cleaners

From http://www.coltforum.com/forums/showthread.php?t=7329.

Further info at: http://www.coltforum.com/forums/showthread.php?t=20601


Here's a post I did on another forum concerning ultrasonics for guns:
The good points:
They really clean.
They usually clean FAST. Drop a dirty part in, and the dirt actually BOILS off in a cloud.
They DEEP clean, getting crud you normally don't even see. Ultrasonics get into cracks and holes that normally you can't get to with other methods.
They're especially good on harder fouling. (Ultrasonics work better on hard dirt).
You don't have to disassemble things. Ultrasonics are used by watchmakers to avoid having to disassemble some small components.

They work with a variety of solutions. Water with detergent works on many types of dirt, so you don't HAVE to use a volatile solvent.
The solution is heated up by the ultrasonic action. Warm solution cleans even better. Many tanks have a built-in heater also.
You can put an inch of water in the bottom and use small glass or plastic cups to hold solvent and small parts.
The ultrasonic waves are transmitted by the water in the bottom through the beakers or jars.

You can use the tank for MANY cleaning jobs, Paint brushes, dirty watch bands, electric razor heads, you're wife's jewelery, car parts, ANYTHING that you can fit into the tanks will clean up surgically clean.

The bad:
KEEP YOUR FINGERS OUT OF THE TANK. Ultrasonics and bones don't mix.
This isn't something that happens instantly, it's over time.

Expense. The larger tanks are COSTLY. However, if you want to clean a stripped pistol or small parts, one of the smaller $150.00 range tanks will work fine.
You CAN put a portion of a frame or slide in the tank at a time.
After cleaning it, turn it over and clean the other half.

Any solvent that will attack plastic or gun finishes, will attack it FASTER in ultrasonics.
Most sight dots or markings are nothing more than paint. These may be removed by the cleaner.
Some solvents like Simply Green attack aluminum, and other soap-type cleaners can attack finishes.
They will attack faster and more aggressively in the cleaner.

You've got to be careful to apply a THOROUGH coat of anti-rust lube after cleaning. Ultrasonics remove ALL grease and lube, leaving the part absolutely bare, including in tiny holes and crevices that ordinarily cleaning never touches.

They don't work as well on soft gummy grease as harder dirt. You can speed things up by pulling parts out and scrubbing with a brush.

They're electronic and heat the solvent. You have to be careful with flammables.

Ultrasonics do nothing for bore fouling. You still have to use bore solvent, brushs, and patches to clean the barrel.
It "may" help loosen leading, but a Lewis Lead Remover is faster and better.

Advice:
If possible buy a basket that holds parts off the bottom or make up wire hangers. Ultrasonics work better when the parts are suspended in the solution instead of laying on the bottom of the tank.

A tank cover is nice to hold down fumes.

NEVER run the unit when the tank is dry even for a few seconds, it'll burn out.

Be careful what cleaning solution you use. You can pull the item out and find finish or plastic parts GONE.

Be careful with Tritium sights, and sights with any kind of inserts or dots. Many can be damaged or removed in the tank.

The small tanks sold in discount stores for cleaning false teeth and jewelery really don't work too well, and most of them aren't even real ultrasonic units.

3,500+ lbs of revolver accessories!



A bunch of repairs need a lathe and mill. Fortunately I was finally able to score two at pretty good prices. They were dropped off last week.


The mill is a Wells Index 700 that seems to be around 3,000(!) lbs.

The lathe is a very old but very clean southbend engine lathe with a lot of tooling.

I was hoping to get a used hardinge or equivalent, but the SB was $1000 and close to my house. The guy that had it restored old cars and had an immaculate tool room. I want to buy everything from him :)

The mill was only slightly more, also close to my house. It *seems* I can use it manually. I hope so. If not, it seems I can sell it for more than I paid so at least there is always that escape route. (Same is true for the lathe.) It's dirty as hell, but the scrapings on the ways are still mostly there. The major downside is that there is no tooling, but I'm *hoping* I can fix this easily. The wells index people still service their machines , so at least it's not obsolete. (Update: it's also up in the air if I can make the quill hold the Z position w/o the servo on. Argh.)

The main barrier for both is that I don't have a 220 outlet in my garage yet, nor a phase converter. Hopefully the former will get sorted early next week.







Sunday, June 21, 2009

Back from a hiatus

Just got back from a trip to AZ to work with Frank Glenn on colts. It's pretty helpful to have someon experienced go through stuff & check for mistakes. I bought out 4 colts and my dad bought down 2 and we just went through fixing each (mostly eliminating endshake). I also learned how to curve the sear on a trigger using a torch so that you can eliminate stacking.

Frank is really helpful and very polite. The main hint that indicates he's concerned about your (lack of) technique is that the frequency of him offering a specialized tool to do what you're attempting will go down dramatically. Also, the time he holds the gun in question goes up substantially.

I'll post a longer run through later. Two big lessons: (1) the factory sometimes screws up and (2) cranking a colt down to 0 endshake will invariably expose preexisting problems.

The first case came up because a barrel cylinder gap of 0 turned out not to be from an overly worn cylinder collar but b/c whoever fit the barrel at the factory couldn't file that day, so left the right side higher than the left. Once it was refaced, things were just fine.

For the second: I used to be a hardcore "there must be 0 endshake!" type. However, that enthusiasm got tempered a lot. Generally you fix endshake by shoving the cylinder towards the rear of the frame (either using a bushing or lengthening the cylinder collar). 0 endshake requires pushing the cylinder pretty hard. It also means the cylinder must travel straight through any resistance rather having the play that lets it move around it. The end result: 0 play always exposes some preexisting source of binding. With play, the colt can often work around any such thing. Without, it will require forcing right through it. Often I could fix endshake in some amount of time (say X) but tracking down binding and eliminating would take 2X.

Monday, June 15, 2009

What he said


The sad reality is that the legal conception of evidence is absolutely worthless from an intellectual standpoint. The mere fact that it is possible to exclude evidence from courtrooms, even though it is known by all parties to be factually valid, demonstrates beyond doubt that a law degree is completely without value in any field that deals with objective fact.

And other generally enthusiastic statements at: http://www.uwgb.edu/dutchs/pscindx.htm

Sunday, June 14, 2009

A data on boy/girl pay disparity

Canadian girl doctors work 30 hr/week vs boy doc of 35 hr/week which, unsurprisingly, can show up as a pay difference: http://offsettingbehaviour.blogspot.com/2009/05/gender-gaps.html#comments

If hours worked vary by gender, then we expect average salary differences across genders. If we don't have observations on hours worked, average differences then show up in the coefficient on gender in a wage regression.

the godzilla frame wrench



I spent friday night making the mother of all frame wrenches(*) from a ginormous chunk of aluminum. There's really no need for it to be this size other than the aluminum was such a nice piece I didn't want to remove any of it.

It took four hours rather than the needed 30 minutes, but was fun nonetheless. It's not quite done since I am still debating whether to make it take inserts or cut it so it only fits colt I/E frames (which is all it will ever get used for).

Those of you who reload might be amused by the repurposing of the stock dillon handle. I have three of these things that have been sitting in my closet. Finally there is a use!


(*) Frame wrench = wrench used to hold and rotate the frame in order to remove the barrel.

The python is a 6" used for scale. I put a photo of the frame wrench in the shop manual so you can see what a well adjusted adult would have made.








1980s communist germany underground fashion.



A photo essay of the results of struggling with (unfortunately topical) problem of how to make something interesting out of State Supplied articles:
http://www.spiegel.de/international/germany/0,1518,628632,00.html

UK seemingly recovering better than US, without wasting huge amounts of money.

No less a robo-partisan than Krugman admits that the UK's use of inflation and negligible "stimulus spending" seems to have the odd result of having it recover when no one else is: http://blogsandwikis.bentley.edu/themoneyillusion/?p=1530

It's always amusing that the same people apoplectically, rabidly, and screechingly against flat taxes seem to shrug off inflation when, in fact, they are basically the same thing. In fact I always look at inflation as being even more of a flat tax than an official "flat tax" could ever be, since it taxes everyone holding the currency, not just those that fall under the reach of the tax code.

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