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Old 10-02-2010, 07:52 AM
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How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw?  
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Default How do you "fit" a yoke retention screw?

I have purchased a new yoke retention screw for a model 27-2 and it was listed as a fitted part. I fully understand the function of the screw and its design.

What I would like to know is, do you remove material from the diameter where the screw is necked down at the tip ...or... do you remove material from the length or a combination of both?

The screw as it is now, slightly causes drag on the yoke when opening the cylinder.

Thanks for your reply's. Bob
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Old 10-02-2010, 08:25 AM
4MUL8R 4MUL8R is offline
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How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw?  
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I would think that removing material from a diameter could not be reliably and properly accomplished without a lathe. In addition, a screw is not normally used to position things along its axis, as it requires clearance to move axially. So, although I am NOT speaking as a gunsmith, I can only think that this screw length has to be adjusted. This page may help K-22 Yoke Slop, options? - Pistolsmith
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Old 10-02-2010, 08:42 AM
ronnie gore ronnie gore is offline
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How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw?  
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i have fitted several just remove material from the end, but go slowly and deburr.
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Old 10-02-2010, 09:31 AM
scooter123 scooter123 is offline
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They procedure is actually pretty simple, what you want to achieve is a tip that looks a bit like the tip of a drill with a small flat on the end about 1/32 inch in diameter. What is different is that the angle on the point is 90 degrees instead of 135 degrees, so the side angle is 45 degrees. You also want to hit the exact point where there is no drag while not allowing any fore and aft movement of the crane when it's closed and the screw is fully tightened.

Warning. Be very careful when tightening the screw, fully tightening this screw when it's not properly fitted can damage the stud on the crane. While tightening the screw test the crane for drag and stop tightening it if you feel the drag increasing. You've have it fitted when the screw gets tight just at the point where you feel just a hint of drag.

Tools. My preferred tool for doing this is a small diamond Knife Sharpener in a course grit to start and fine grit to finish. You can sometimes find these at a good hardware store. If you can't find them at your local hardware store, try the following 2 links.

Production Tool Supply

Production Tool Supply

One other tool that can make this task a lot easier is a collet type pin vise large enough to clamp on the head of the screw for holding the screw. These can sometimes be found at a hobby shop for model airplanes and the like.

Production Tool Supply

PS, the above items are quite useful to have in anyones tool kit. The Diamond laps last forever and do a great job on sharpening knives and that pin vise is also useful for holding very small taps or any small round part you need to hold firmly.

Last edited by scooter123; 10-02-2010 at 09:35 AM.
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Old 10-02-2010, 10:01 AM
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How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw?  
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The 'side' of this screw, i.e., where the screw is necked down at the tip, is what the flange on the crane (yoke) contacts to keep from moving forward. If the clearance between the screw and flange is too much, the crane can move forward, reducing barrel/cylinder gap. If the clearance is too little, the crane will scuff against the screw and the cylinder will be hard to open. So, yes, it's a fitted part and the fit is somewhat important.
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Old 10-02-2010, 11:27 AM
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How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw?  
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Ok, thanks guys. That is exactly the information that I needed.

Scooter, thank you for your very detailed reply. I pretty much figured that was the procedure but its nice to have it confirmed. Bob
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Old 10-02-2010, 03:03 PM
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Bullseye Smith Bullseye Smith is offline
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How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw? How do you "fit" a yoke retention screw?  
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Pull the yoke out and look at it. If it has a ring where the tip touches - file the end of the screw a little. If it is rubbing on the side or slope of the screw file just a little on the shinny spot on the screw.
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