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Topic: stripped leg theads |
Hook Moore
From:
South Charleston,West Virginia
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Posted 29 Jun 2005 10:14 am |
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I have a friend with Sho-Bud Professional D-10. The threads are stripped out of the endplate for the left rear leg. Anyone have any fixes or ideas? If not, maybe an idea where he could find another endplate?(keyhead end)
Hook
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www.HookMoore.com
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Mark Herrick
From:
Bakersfield, CA
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Posted 29 Jun 2005 10:28 am
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You could look into a Heli Coil type thread repair kit. An automotive machine shop might be able to help you get the right size and with the installation.
Thread Repair Kits
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[This message was edited by Mark Herrick on 29 June 2005 at 11:29 AM.] |
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chas smith R.I.P.
From:
Encino, CA, USA
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Posted 29 Jun 2005 11:00 am
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| To corroborate what Mark said, the best solution is a heli-coil. First off, you might try "chasing" it with a roll tap, if there's anything left. |
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Jerry Roller
From:
Van Buren, Arkansas USA
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Posted 29 Jun 2005 11:12 am
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Another possible solution is to have a longer lug made for the leg so the threads will go deeper into unworn threads. I am interested in knowing more about how helicoils are installed.
Jerry |
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richard burton
From:
Britain
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Posted 29 Jun 2005 11:26 am
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What size thread is it?
If it's 1/2" UNC it could be tapped out to 9/16" UNC and a new threaded end plug made for the leg (if you have access to a machine shop).
R B |
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Bob Carlucci
From:
Candor, New York, USA
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Posted 29 Jun 2005 12:39 pm
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| Hook..Chas is correct. I would try running a tap through it first.. If there is not enough meat, any local auto parts store can set you up with a heli coil... You buy the entire kit.. It comes with detailed instructions.. I have done it several times in my auto mechanic day gig.. Piece of cake.. Check the male threads on the leg too... They may need to be cleaned up with a thread file..bob |
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Mark Herrick
From:
Bakersfield, CA
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Mike Bowles
From:
Princeton, West Virginia, USA
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Posted 29 Jun 2005 1:33 pm
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| heli coils work great ive used them on lots of mining machinery they are easy to install probably any auto parts store can help I think an instruction sheet comes with them if the threads are already stripped a tap probably wont help good luck |
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Rick Garrett
From:
Tyler, Texas
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Posted 29 Jun 2005 2:45 pm
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Take the leg of the guitar with you and tell the auto parts man you need a heli coil that exact size. Go home and run the heli coil down in the end plate (comes with a tool to do this) and then screw the leg in and you're done. Piece of cake.
Rick |
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Donny Hinson
From:
Glen Burnie, Md. U.S.A.
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Posted 29 Jun 2005 3:17 pm
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| Uhh, Rick...aren't you forgetting the helicoil tap? To get back to the original size, you have to re-tap the hole larger so the helicoil will fit and the I.D. of the helicoil will match the size of the leg. |
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Larry Strawn
From:
Golden Valley, Arizona, R.I.P.
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Posted 29 Jun 2005 6:08 pm
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Hook,,
It's an optional thing with a Heli-coil, some folks like to use a few drops of Loc-tite to keep the Heli-coil insert from backing out when bolt,,[leg] is being unscrewed.
They don't allways back out, but there is a possiblity.
Larry
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Emmons S/D-10, 3/4, Sessions 400 Ltd. Home Grown E/F Rack
"ROCKIN COUNTRY"
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chas smith R.I.P.
From:
Encino, CA, USA
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Posted 29 Jun 2005 7:08 pm
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For the 1/2-13 heli-coil, the hole is drilled out to 17/32 and the special heli-coil tap is used. There is an insert tool that engages a tab on the end of the insert and threads the coil into the hole. The coil is a stainless steel spring and while it's being threaded in, the pressure is "off". When it's in, the tool breaks off the tab and the spring pressure holds it in place.
When you buy the kit, there will be a bunch of coils and so you want to use at least one, to practice with, on somebody else's guitar. Then after you've got it down, you might as well do all of yours. |
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Hook Moore
From:
South Charleston,West Virginia
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Posted 30 Jun 2005 4:26 am
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Thanks everyone. I was not sure about finding a helicoil with the same thread as the guitar leg. My friends guitar is in excellent original condition other than this leg thread problem and I know he appreciates your info and help.
Hook
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www.HookMoore.com
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Eric West
From:
Portland, Oregon, USA, R.I.P.
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Posted 30 Jun 2005 4:49 am
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Hook. I have the set with some extra coils. I'd sell and ship it for cheap, and/or advise him.
There's a trick to putting them in and making them "behave" right afterward.
Have him email me or I'll post a little more this eve. Long day ahead.
EJL |
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Hook Moore
From:
South Charleston,West Virginia
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Posted 30 Jun 2005 5:29 am
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Thanks very much Eric! I`ll let him know.
Hook
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www.HookMoore.com
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Bobbe Seymour
From:
Hendersonville TN USA, R.I.P.
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Posted 30 Jun 2005 6:41 am
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| Or I could sell him a new end plate, which I have several of in stock. This is the only way to be sure to have a perfect angle on the legs afterward. |
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Hook Moore
From:
South Charleston,West Virginia
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Posted 30 Jun 2005 2:45 pm
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Thanks Bobbe, he has read the forum and will decide which way he wants to go..thanks everyone.
Hook
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www.HookMoore.com
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Eric West
From:
Portland, Oregon, USA, R.I.P.
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Posted 30 Jun 2005 7:22 pm
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Didn't get an email but I'll post the process I went through.
Chances are the threads wore imperfectly, so use the best "eyeball" you can when using the 7/32 drill. One shot, be careful and don't walk it around. Just In and Out.
Tapping is similar. Aluminum is a little tricky, but thread cutting oil and a careful hand will get you there.
Now. After threading you clean it with lighter fluid to get the oil out, blow it out and repeat with an air nozzle to get the loctite to seat on clean metal.
Dribble a small amount of green sleeve retainer Loctite™ down the new clean threads.
Screw the insert in flush with the end so there's no protrusion, break off the tang. If you use the green, DON'T stop til it's all the way in.
Then, before the Loctite dries completely put some type of antistick lube sparingly on the leg threads and work it in, screwing it in a turn, walking it around so that it loosens up the fit. If you don't it can easily be too tight. Walk it in and out a few times so it isn't too tight, take the leg out and let it dry.
You can use Red Loctite, as it's more forgiving, but the Green is like brazing. For that reason DON'T leave the leg screwed in while it dries.
Being a rear leg, it doesn't matter if it is a hair off where it was before. Mine wasn't, but like I said they don't have to wear concentrically.
I just bumped the ad I put up for it in "Accesories" after I used it. I used one out of the four included coils.
Can't see any need for it in the future.
EJL |
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Hook Moore
From:
South Charleston,West Virginia
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Posted 1 Jul 2005 4:48 am
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Thanks Eric, He called lastnight to say he found a helicoil kit and ask me to thank all for the helpful advice.
Hook
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www.HookMoore.com
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