Uberti 1860 short arbor fix

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Thanks Smokerr and Captainkirk!!!
Anyway, here we go !!
Here's the spacer with the witness mark -
20241209_120600.jpg

Here's the spacer in place with the frame and barrel lug not meeting.-
20241210_154003.jpg

Dressing the spacer gets the barrel lug and frame to meet -
20241210_160312.jpg

Now all you have to do is dress the spacer to get your endshake.
Same with the Leech and Rigdon-
20241211_165533.jpg
 
Last edited:
The Pietta ( Dance and Bros) in this case has an arbor that is too long so -
20241211_184943.jpg

So, I'll dress the arbor to get my "endshake" and all will be good.

The thinness of the forcing cone on the Dance would dictate absolutely NO conversion cylinder for these revolvers!!!
20241211_190300.jpg


Stay warm !!!
20241211_191103.jpg

Best shop heater ever!!!!

Mike
 
Cozy! We have an 80s Earth Stove, used to heat the house with it before the ruptured disk put an end to wood cutting.

Great info on the Forcing Cone, not an issue for me but others would need to be aware. Phew.

Love the pictures
 
Total odd 1860 here had to file down the arbor end on a pietta so the gap was not like 1/64. But that was with a Kirst cylinder.
 
45D said:
Thanks Smokerr and Captainkirk!!!
Anyway, here we go !!
Here's the spacer with the witness mark -
View attachment 367921
Here's the spacer in place with the frame and barrel lug not meeting.-
View attachment 367922
Dressing the spacer gets the barrel lug and frame to meet -
View attachment 367923
Now all you have to do is dress the spacer to get your endshake.
Same with the Leech and Rigdon-
View attachment 367925
Click to expand...
Mike thanks for showing. I can't wait to impress my buds with my knowledge. hahaha. But lol I will be coming back with questions. lol 😆 🤣 😂
 
Ok, so the '60 Army (U) has the spacer "installed" and the endshake is .0035" . I'll take material off if the arbor to "land" in the .0025"- .003" spec.
20241212_114614.jpg

Same with the L&R -
20241212_114721.jpg

The top or 12 o'clock section of the forcing cone will need to be dressed to end up with a "square" setup.

The Dance ended up at .003" endshake but I'll take the slightest off the arbor so it can "shoot" into its spec of "just shy" of .003" -
20241212_114829.jpg


Now, all 3 of these revolvers will be the same revolver they were set up to be every time they are assembled.

Mike
 
45D said:
Ok, so the '60 Army (U) has the spacer "installed" and the endshake is .0035" . I'll take material off if the arbor to "land" in the .0025"- .003" spec.
View attachment 368074
Same with the L&R -
View attachment 368075
The top or 12 o'clock section of the forcing cone will need to be dressed to end up with a "square" setup.

The Dance ended up at .003" endshake but I'll take the slightest off the arbor so it can "shoot" into its spec of "just shy" of .003" -
View attachment 368076

Now, all 3 of these revolvers will be the same revolver they were set up to be every time they are assembled.

Mike
Click to expand...
dang. I understand it. seeing is believing. MIKE thanks for showing this
 
45D said:
Ok, so the '60 Army (U) has the spacer "installed" and the endshake is .0035" . I'll take material off if the arbor to "land" in the .0025"- .003" spec.
View attachment 368074
Same with the L&R -
View attachment 368075
The top or 12 o'clock section of the forcing cone will need to be dressed to end up with a "square" setup.

The Dance ended up at .003" endshake but I'll take the slightest off the arbor so it can "shoot" into its spec of "just shy" of .003" -
View attachment 368076

Now, all 3 of these revolvers will be the same revolver they were set up to be every time they are
Click to expand...
 
Last edited:
Understand that these pictures were taken with no hand spring installed. These were to show the endshake and barrel lug / frame joint.
Normally, the hand spring is pushing the cylinder forward so to see /measure the endshake, one must pull the cyl to the rear.

Mike
 
Note the slight gap on the bottom of the lug in the center picture that indicates the fit out of plumb.
You don't want to adjust the barrel/cylinder gap by dressing the barrel breech at the forcing cone. You level the gap by adjusting the arbor end fit. wedge depth and lower lug height other wise you leave the coaxial misalignment between the chamber and barrel bore that causes the uneven gap to begin with.
Filing the barrel breech also shortens the top of the cone angle into the bore and creates an ovate instead of a round at the breech opening.
 
Last edited:
buttap said:
Total odd 1860 here had to file down the arbor end on a pietta so the gap was not like 1/64. But that was with a Kirst cylinder.
Click to expand...
Was the Kirst cylinder for a Pietta?
The Pietta cylinders are slightly longer than those for an Uberti. I always use Pietta cylinders in Uberti revolvers so you can use standard length ammo (of course you have to reduce the forcing cone slightly for fitting).

Mike
 
Yes kirst on a pietta but bit of file its just can get a sheet of paper in the gap with it smacked to heck with a plastic end gunsmith hammer. 50 years of dealing with them things and I lean new stuff at the time too but the kirst .45 conversion is a new deal for me.
 

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