Bolt rotation pin question |
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John Nada
International Auto Mag Joined: 23 Sep 2014 Location: France Status: Offline Points: 222 |
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Posted: 08 Jul 2015 at 12:40am |
Hi,
I ordered a new bolt rotation pin for my Pasadena Auto Mag. I received one with some twisted groove on it. I was told by the seller they're all the same. Could you confirm this? Thanks. |
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omie01
Callahan's Auto Mag Joined: 05 Feb 2012 Location: Minnesota Status: Offline Points: 604 |
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I have seen this on at least one of my guns.
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TRX302
Callahan's Auto Mag Joined: 02 Dec 2011 Location: Arkansas Status: Offline Points: 680 |
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The machinist didn't back off the cutting tool when winding it back off the workpiece.
It's not just a sign of poor workmanship, it's a good way to damage the cutting edge of the tool. |
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Rumore
Callahan's Auto Mag Joined: 14 Nov 2008 Location: Inola, OK Status: Offline Points: 474 |
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I can't imagine a machinist would run the tool down the part after the LAST CUT.
My guess is the operator didn't plan on that being the last pass and intended to make another cut, but when he mic'd it, the diameter was already at or near nominal, so that was it. But....either way, it's pretty sloppy work. Tony |
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BEEMER1
Callahan's Auto Mag Joined: 06 Jan 2010 Location: iowa Status: Offline Points: 1307 |
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Maybe it's an oil groove.
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AutoMagyar
Callahan's Auto Mag Joined: 20 Jul 2012 Location: The Big Smoke Status: Offline Points: 313 |
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At least that part there looks like it should be semi-easy to reproduce by reverse engineering it, if you really had to, depending on the material spec. Not like some of the other orignal parts that are castings. This rotation pin has a pretty simple geometry to it. Good that you were able to get a real spare part though, and that score mark doesn't look like it should make much of a difference function-wise, as long as the main OD of the pin is good.
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"Are you gonna pull those pistols or whistle Dixie?"
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AMTFAN44
International Auto Mag Joined: 14 Dec 2011 Location: Kalifornia Status: Offline Points: 134 |
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I'd stone, what appears to be a tiny dent, on the bottom corner of the pin, before I'd install that in one of my guns. But, I suffer from OCD.
I concur on the "Oil-Groove", nothing to worry about there. Just lazy machining. |
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"Maybe we could build a fire, sing a couple of songs, huh? Why don't we try that?"
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John Nada
International Auto Mag Joined: 23 Sep 2014 Location: France Status: Offline Points: 222 |
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Except Omie01, nobody saw a pin like this one?
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sirsaka
Callahan's Auto Mag Joined: 06 Jan 2009 Location: Portland, OR Status: Offline Points: 810 |
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Sad but true.
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Our greatest glory is not in never falling, but in rising every time we fall.
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omie01
Callahan's Auto Mag Joined: 05 Feb 2012 Location: Minnesota Status: Offline Points: 604 |
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I would just polish it with some 1000 grit sandpaper and keep it well lubed, should work fine.
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