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After purchasing 'grab bag' parts and such over the last year I have come up with a few beaten up gas cylinders. Beaten literally. Who the heck hammers the crap out of these things I do not know but my query is, can they be saved? Threads chased, maybe have some sanded or ground to square off the rounded edges? Tidy up the front sight dovetail? I can't see throwing them away. I know Columbus Machine does great work on op rods but is there someone who works magic on the gas cylinders?
I've neatened up a few with the Harbor Freight 1" belt sander. That tool is handy. Tony Giacobbe refinishes them like new although I'm using one that was finished with header paint and baked. 6 years and still perfect.
we must think alike, I am using Rustolum Flat Black grille paint..used for the barbq pits? Works fine...If its too rough it goes into the bead blaster for smoothing...first..Quote:
Originally Posted by Punch The Clown
I have had Tony G. refinish several for me. They are top notch. Otherwise, I Like AlumnaHyde II for things like that, they have a light and dark parkerizing color, but I'm sure engine paint work's just fine too.
I would just make sure the bore is in spec, if so just clean it up as best you can with a dremel, or sander, and put it on a shooter.
Justin
BBQ paint never held up for me.
Have ordered the correct tap for cleaning up some fubared threads. My neighbour has a sanding gizmo that I will use to take off the hammered edges and then I will give them a good media blasting. Then to decide on what finish (s) to use.
Me either.Quote:
Originally Posted by Orlando
FWIW, I just Googled for the correct Garand gass cylinder tap and found this......http://www.nicolausassociates.com/PD...ingThreads.pdfQuote:
Originally Posted by ZBeast
and this.....
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Quote Originally Posted by purple View Post
A question for the machinists on thread compatibility. I have a 9/16-32NS tap which I use to clean up the threads on gas cyls. The Kuhnhausen Shop Manual indicates that gas cyl threads are 9/16-32 NS3B mod, major dia .5625; minor dia .532+.003. Thread sizes on the lock screws are shown to be 9/16-32 NS, major dia .5625 min; minor dia .5287+ .0034.
As I read it I should be OK to use my 9/16 -32NS tap to clean up the threads on several lock screws which either won't fit or which bind part way thru installation. Can someone confirm this pls.
Yes. The gas cylinder thread minor diameter is slightly larger that the lock screw minor diameter. Otherwise if they both were the same, it would be a metal-to-metal fit on the minor diameter. I use a 9/16-32 NS HS3 tap which is .0025 oversize overall. You won't know the difference cleaning buggered and dirty threads.
It'll work. Thread standards changed ever so slightly about 60 years ago.
I bought a tap on E-Bay to save a few buggered up cylinders. Worked fine