Author Topic: cylinder notch peening  (Read 820 times)

Offline nativeshootist

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cylinder notch peening
« on: May 29, 2022, 11:18:25 PM »
 does anyone know how to fix a cylinder notch thats peening around the edge of the notch and the slope before it?

Offline Coffinmaker

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Re: cylinder notch peening
« Reply #1 on: May 31, 2022, 02:08:14 PM »

 :)  Nativeshootist  ;)


Yes I do.  And Maybe not.  It depends on "how bad."  First, however, you have to fix the cause(s).  Fit the bolt.  Then validate the timing.  Then reduce the cost side of the Trigger/Bolt Spring.  Or source up a lighter after-market spring.

you will need a padded vice and nice sharp heavy duty Utility Knife.  Clamp the cylinder in a padded vice and use the Utility Knife to carefully cut away the burr.  As that little bit of blade starts to dull - REVERSE IT or THROW IT AWAY.  Do NOT try to work with a dull blade.  If the peening is really bad, buy a new cylinder.  Then FIT THE BOLT, TIMING, Reduced Spring.

Play Safe Out There

PS:  When you slip, the whole neighborhood is going to learn new words.  Don't ask how I know this FACT  :'(

Offline Pettifogger

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Re: cylinder notch peening
« Reply #2 on: May 31, 2022, 06:11:57 PM »
Photos of how bad the problem is?

Offline nativeshootist

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Re: cylinder notch peening
« Reply #3 on: May 31, 2022, 07:53:44 PM »
Here's a photo of the peeping.
https://imgur.com/a/LD1lgCv

Offline Pettifogger

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Re: cylinder notch peening
« Reply #4 on: June 01, 2022, 12:29:49 AM »
That looks like the cylinder is salvagable.  I do it similar to Coffinmaker but use a hardened steel deburring tool.  Piettas tend to have bolt heads that are slightly to wide so as previously noted you need to fix the bolt fit and timing so the notch does not start peening again.


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Re: cylinder notch peening
« Reply #5 on: Today at 05:11:19 AM »

Offline Coffinmaker

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Re: cylinder notch peening
« Reply #5 on: June 01, 2022, 08:34:00 AM »

 :) NativeShootist  ;)

Agree with Pettifogger.  Your Cylinder does appear to be quite salvageable.  It also appears the Bolt has NEVER fit the slots.  After de-burring the cylinder, before you put it back into service, please refer to Pettifoggers most excellent tutorial for fitting the bolt.  Currently, the bolt head is NOT entering the cylinder slot but is just sitting on the top of the slot.  FIT THE BOLT!!

 :)  Pettifogger   ;)

Where'd you get that nifty de-burring tool??  Weak minds are curious, even if retired  ::)

Offline Pettifogger

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Re: cylinder notch peening
« Reply #6 on: June 01, 2022, 12:07:02 PM »
:) NativeShootist  ;)

Agree with Pettifogger.  Your Cylinder does appear to be quite salvageable.  It also appears the Bolt has NEVER fit the slots.  After de-burring the cylinder, before you put it back into service, please refer to Pettifoggers most excellent tutorial for fitting the bolt.  Currently, the bolt head is NOT entering the cylinder slot but is just sitting on the top of the slot.  FIT THE BOLT!!

 :)  Pettifogger   ;)

Where'd you get that nifty de-burring tool??  Weak minds are curious, even if retired  ::)

Any tool supply outlet.  Here is one from MSC.

https://www.mscdirect.com/product/details/05752647

Offline nativeshootist

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Re: cylinder notch peening
« Reply #7 on: June 01, 2022, 03:22:09 PM »
I forgot to mention i was following Pettifogger's articles and the revolver is an Uberti, i will go and buy the deburring tool though

Offline Coffinmaker

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Re: cylinder notch peening
« Reply #8 on: June 01, 2022, 04:22:12 PM »

 :) Ok  ;)

The procedure for fitting the Bolt is same same whether Pietta or Uberti.

The Procedure for fixing the peen'd slots is likewise, same same.

Your Cylinders Leads also show significant scuffing which indicates a too heavy Trigger/Bolt spring.  Look into a lighter Trigger/Bolt spring.

Play Safe Out There

Offline nativeshootist

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Re: cylinder notch peening
« Reply #9 on: June 01, 2022, 06:49:30 PM »
thanks you both, you're a lot of help.

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Re: cylinder notch peening
« Reply #10 on: Today at 05:11:19 AM »

Offline RRio

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Re: cylinder notch peening
« Reply #10 on: July 24, 2022, 11:25:54 AM »
:)  Nativeshootist  ;)


  First, however, you have to fix the cause(s).  Fit the bolt.  Then validate the timing.  Then reduce the cost side of the Trigger/Bolt Spring.  Or source up a lighter after-market spring.


100% correct. Also, put a mirror finish on the top of the bolt (by polishing it) to make it slicker than frog snot.
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