Action Jam Uberti 1851 Colt

[44 Dave]

The hand passage needs to be smooth (there is a file made especially for that) and the arbor should not deflect the hand. These are all part of tuning these Italian clones for smooth fast action and long life.
Some people even use a Ruger type hand spring, not to mention names Mike.

 

[Tommygunn]

A bit of an update:

We've been discussing Uberti Colt repros and the lack of the relief flat on the arbor that seems a new feature?

Well, I went and disassembled a couple of older Pietta Colts. They have the relief flat.

Then I checked three of my newer Pietta Colts......
THEY ALSO DID NOT HAVE THE RELIEF CUTS -- JUST LIKE THE NEWER UBERTIS!
One thing I also checked, on two of three Piettas, no lock ups or mechanical problems resulted when the gun was cocked disassembled.
On one, the bolt would not come up until manually pressed but then it worked. All three guns worked well assembled, but then I always knew that anyway.

It seems to me these Italian companies must have done this as I theorized earlier, as a time/cost saving measure.
Or .... coincidence? Evil trilateral conspiracy? Naaaw, that's too far. Too Alex Jonesy.
But ....sorta interesting, I guess.

 

[denster]

A bit of an update:

We've been discussing Uberti Colt repros and the lack of the relief flat on the arbor that seems a new feature?

Well, I went and disassembled a couple of older Pietta Colts. They have the relief flat.

Then I checked three of my newer Pietta Colts......
THEY ALSO DID NOT HAVE THE RELIEF CUTS -- JUST LIKE THE NEWER UBERTIS!
One thing I also checked, on two of three Piettas, no lock ups or mechanical problems resulted when the gun was cocked disassembled.
On one, the bolt would not come up until manually pressed but then it worked. All three guns worked well assembled, but then I always knew that anyway.

It seems to me these Italian companies must have done this as I theorized earlier, as a time/cost saving measure.
Or .... coincidence? Evil trilateral conspiracy? Naaaw, that's too far. Too Alex Jonesy.
But ....sorta interesting, I guess.

The newer Piettas , if you look closely, have a reduced diameter area where the arbor enters the frame to allow for hand clearance. Serves the same purpose.

 

[44 Dave]

The newer Piettas , if you look closely, have a reduced diameter area where the arbor enters the frame to allow for hand clearance. Serves the same purpose.

Don't know when I will get my hands on a "new" Pietta. I understand the savings of not having to machine each arbor with a separate operation .

 

[denster]

Don't know when I will get my hands on a "new" Pietta. I understand the savings of not having to machine each arbor with a separate operation .

The change likely has to do with when Pietta changed over to cnc machining. The short section of reduced diameter serves the same purpose as the previous clearance flat.

 

[Tommygunn]

The newer Piettas , if you look closely, have a reduced diameter area where the arbor enters the frame to allow for hand clearance. Serves the same purpose.

I'll check again. I didn't think to look for that feature.... looking for a "relief flat" I suppose. You see what you want to see, expect is there, but don't see a possible alteration to compensate that a manufacturer might have added.
Thanks for the info!

EDIT: TODAY, A FEW HOURS LATER:

I went and examined both my new Uberti and Pietta Colts, the ones without that relief flat. Sure enough, Denster was correct, the Piettas cut a relief rebate around the arbor as compensation for the missing flat.
Guess what? My Ubertis have the same rebate! But, they don't mill it as deep, and that may be what is causing interference on some of their Colt repros. Just F. Y. I.