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Old 07-10-2018, 10:33 PM
fortyshooter fortyshooter is offline
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Model 69  ball lock ?? Model 69  ball lock ?? Model 69  ball lock ?? Model 69  ball lock ?? Model 69  ball lock ??  
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Default Model 69 ball lock ??

Just how much is this adding to the crane lock up given the low tension on the ball spring and the apparent misalignment of the V groove??? This is a picture of my 69.


Last edited by fortyshooter; 07-10-2018 at 10:51 PM.
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Old 07-10-2018, 10:54 PM
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Lou_the_welder Lou_the_welder is offline
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That is normal. There are threads relating to this topic.

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Old 07-10-2018, 11:09 PM
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Kernel Crittenden Kernel Crittenden is offline
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It would be misaligned if it were centered in the groove.
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Old 07-10-2018, 11:28 PM
fortyshooter fortyshooter is offline
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Appears to be a machining or blueprint flaw that they let slip through. Being a retired Toolmaker and knowing a few things about ball locks....the ball supposed to be centered in the groove to give 100% lock up.
I guess 50% is better than nothing nowdays.
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Old 07-10-2018, 11:37 PM
PsTaN PsTaN is offline
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Mine looks the same.
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Old 07-11-2018, 04:02 AM
kaaskop49 kaaskop49 is offline
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When the Model 69 first appeared (was it 4 years ago?) this very matter, the ball lock not centering in the notch, was heavily debated on this forum. A search will turn up literally TONS of pages on the ball lock.

Kaaskop49
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Old 07-11-2018, 05:38 AM
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One instance posted on the forum where the ball didn't touch the notch at all, that's a defect. IIRC, this design started with the X-frame revolvers so it's not a blueprint error nor machining error.
The short barrel version has a different design - moved the detent so customers can't see it. Out of sight, out of mind.
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Old 07-11-2018, 06:43 AM
scooter123 scooter123 is online now
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Quote:
Originally Posted by fortyshooter View Post
Appears to be a machining or blueprint flaw that they let slip through. Being a retired Toolmaker and knowing a few things about ball locks....the ball supposed to be centered in the groove to give 100% lock up.
I guess 50% is better than nothing nowdays.
As a working Engineer I have to disagree with your statement, something rather typical between Toolmakers and Engineers. This is an application where the ball should NOT be centered in the notch, it should be providing a Pre-Load Force acting to keep the cylinder firmly pressed into the engagement.

Note, as has always been true the Engineer always gets what he desires and the Toolmaker reserves the right to say I Told You So for a year or two after that Engineer falls flat on his face. I will also note that I've learned a great deal from Toolmakers over the years and make it a habit to listen to their suggestions but this is a case where a Pre-Load design is superior.
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Old 07-11-2018, 07:21 AM
Dave Lively Dave Lively is offline
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The link below points to a picture I took of mine for a previous thread. As others have stated this is by design and the way it is supposed to be. I don't have a 2.75 inch model but have read they "fixed" the perceived problem by covering the ball up so nobody can see it.

BTW, I do clean my guns. If anyone disagrees let me take a picture of your gun with a 1:1 macro lens and we will see just how clean they really are.

SW 69 = failure
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Old 07-11-2018, 09:30 AM
Paul105 Paul105 is offline
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Here's the new lock up on the 2.75" M69

Crane/



Frame




I'll pick up my new (backup) 2.75" M69 today. Don't have a stocking dealer, so always order from Davidson's (replace/repair guarantee) when possible. Pay a bit more for the peace of mind.

Report will follow.

Paul
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Old 07-11-2018, 09:43 AM
fortyshooter fortyshooter is offline
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Quote:
Originally Posted by scooter123 View Post
As a working Engineer I have to disagree with your statement, something rather typical between Toolmakers and Engineers. This is an application where the ball should NOT be centered in the notch, it should be providing a Pre-Load Force acting to keep the cylinder firmly pressed into the engagement.

Note, as has always been true the Engineer always gets what he desires and the Toolmaker reserves the right to say I Told You So for a year or two after that Engineer falls flat on his face. I will also note that I've learned a great deal from Toolmakers over the years and make it a habit to listen to their suggestions but this is a case where a Pre-Load design is superior.
Well I don't know if you own a Model 69 but the light pressure under that ball isn't going to provide much locking assistance given that it's only contact point is on the ramp leading out like a roller lifter with light spring pressure.
Why would you have a notch cut in there if it wasn't for a locking purpose?
If I were to disable the rear cylinder locking pin, that cylinder would fly right open with a good shake.
Maybe they should call it a light friction lock.

Anyway appreciate your Engineering comments and thanks for the links on the ball lock issue.

BTW...during my working days in the Tooling Dept. of a large office furniture corporation we would get stamping/forming multi station dies shipped in from a contract builder.
My job was to make them FUNCTION correctly to produce the intended part.
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