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Help fixing turret cap threads

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/20/2015 at 22:48
sucker76 View Drop Down
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Hello, I bought a used Leatherwood CMR4 scope and there is a problem with the windage cap threads (I knew of the issue when I bought it).  The threads that hold the turret cap on are stripped and the cap falls off after a few shots.  I have tried a few things that aren't permanent with no luck.  I can't seem to find any guidance on this anywhere.  The threads in question are on the scope body and not the cap.  Is there a fix short of sending the scope to Leatherwood?  To be clear this is NOT the actual windage turret but the cap that covers it from being turned.
Thanks in advance.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/21/2015 at 08:41
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Chief Sackscratch

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If you just going to set the windage and leave the scope on  a while without needing to make adjustments I'd dap a few small drops of liquid gasket maker on the spot the threads are missing and push the cap on.  Should hold it on for use but still be able to be pulled off in the event  you needed to adjust.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/21/2015 at 09:23
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+1 on Graham's suggestion. That could actually form threads that would work for awhile. Or you could try Teflon tape you can find in the plumbing section a Lowe's. A couple wraps around the turret threads and then thread the cap on. This would be easy to remove and redo as much as needed. If you want to make it a moderate project. You can order some quality release agent and coat the cap. Then run a small bead of JB weld around the turret threads and just as it is starting to tighten up thread the cap on. I'd be sure it was sighted in first. Because if you don't get a release on the JB weld you just solved the problem "Permanently".
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/21/2015 at 14:10
sucker76 View Drop Down
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THANKS
I have tried the teflon tape and it was a no go. I'll try the gasket maker this weekend. Thanks for the JB weld but...I'd rather the cap fall off than can't fall off. My skills may not be up for this.
Super suggestions, appreciated.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/21/2015 at 16:31
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bowsNbugs

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Perhaps something a bit thicker than teflon tape... electrician's tape maybe?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/21/2015 at 19:31
sucker76 View Drop Down
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I'll try the electrician's tape tomorrow since I have some handy.  The problem is I'm only dealing with about 4-6 very fine threads and the height is about ~1/16" tall. 
Thanks
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/22/2015 at 06:07
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show me your sheep!!

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There is thicker teflon tape used for gas fittings that you can get too.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/22/2015 at 06:17
sucker76 View Drop Down
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Thanks for the input. I'll look for it.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/22/2015 at 09:52
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Chief Sackscratch

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If you try the gasketmaker use a small dot of it in like 4-6 places, not much, you dont' want to make it ooze out on the turrent inside, just enough to have a little stickiness.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/22/2015 at 11:19
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show me your sheep!!

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so your saying use boogers of gasketmaker... Hippie
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/22/2015 at 12:15
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You could always chase the threads with a thread die. I don't know what size threads are on that scope, but I would imagine it's a metric thread in the neighborhood of an M16 - M20 thread diameter. Any chance you have or have access to some thread pitch gauges? If so, lay the thread pitch gage in the thread grooves to measure your pitch, then measure the outside diameter of the thread with a pair of calipers. Or drop by a machine shop and they should be able to tell you what size thread it is. Then either call around to machine shops to see if they have that size thread die or order a thread die. They can generally be had for $15 - $20 or so, which is kinda expensive for single use, but that should fix it unless the threads in your cap are also stripped.

If you can measure the outside diameter of your threads, I can tell you the most probable thread size you have, but you will need to verify the thread pitch to be certain.
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