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Old 04-01-2014, 12:56 AM   #1
AirmanSkee
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Default Left Hand Drill and Tap Drag Link

We are about 3/4 of the way finished with the SAS on my truck, and after getting the pitman arm on today and mocking up the drag link, it proves to be too long. I am going to have to cut it down, and re drill/tap the knuckle end of the draglink once the axle is in and link marked for where it needs to be.

Does anyone have some left hand thread taps that could help out once I get that sized up tomorrow?

I believe AK_Ford (Chris) had mentioned having a set? Maybe I'm wrong. PMs wont let me send out right now.

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Old 04-01-2014, 08:13 AM   #2
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Default Re: Left Hand Drill and Tap Drag Link

I have a 3/4 LH tap, and I had a 7/8 at one point. I'll have to dig around for it though, it's been a few years since I used it.
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Old 04-01-2014, 08:16 AM   #3
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Default Re: Left Hand Drill and Tap Drag Link

You'll need to do it in a lathe, trying to tap something like that by hand is really tough. My little one at home won't do it, but I have access to a few that can handle something that big through the headstock.
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Old 04-01-2014, 08:27 AM   #4
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Default Re: Left Hand Drill and Tap Drag Link

That would be my best bet. I don't have the resources to tap it myself, but I do have a guy at my shop who said another option is to cut and section it, and weld it back keeping the original threads. Would work, but be unsightly and not sure if the tension on that bar would be good for a sectioned draglink. The link is going to need 6-8" cut out of it and then tapped.
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Old 04-01-2014, 10:17 AM   #5
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Default Re: Left Hand Drill and Tap Drag Link

What length do you need? I have one at home I can measure when I get home you may not Have to cut anything
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Old 04-01-2014, 11:05 AM   #6
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Default Re: Left Hand Drill and Tap Drag Link

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Originally Posted by AirmanSkee View Post
That would be my best bet. I don't have the resources to tap it myself, but I do have a guy at my shop who said another option is to cut and section it, and weld it back keeping the original threads. Would work, but be unsightly and not sure if the tension on that bar would be good for a sectioned draglink. The link is going to need 6-8" cut out of it and then tapped.
Someone with a lathe that can thread should be able to do it, tap not needed. Bore to size needed and cut threads.

Or

Cut the middle out. V the ends well and put a slug. Plug weld the slug to the tube. Won't be unsightly, if you clean it up with a grinder.
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Old 04-01-2014, 11:11 AM   #7
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Default Re: Left Hand Drill and Tap Drag Link

Not sure on the exact length. Going out tonight to finish the brackets and roll the axle under and tape it out. I like the idea of just cutting and section into he one I have, unless I can find someone who could do the lathe.
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Old 04-01-2014, 12:57 PM   #8
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Default Re: Left Hand Drill and Tap Drag Link

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Originally Posted by nate View Post
Someone with a lathe that can thread should be able to do it, tap not needed. Bore to size needed and cut threads.

Or

Cut the middle out. V the ends well and put a slug. Plug weld the slug to the tube. Won't be unsightly, if you clean it up with a grinder.
Cutting LH threads on an id isn't fun, you have to start from the inside and work out.

Why does the LH thread end need to be shortened vs the rh side? Does the draglink have a bend in it or something?
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Old 04-01-2014, 02:22 PM   #9
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Default Re: Left Hand Drill and Tap Drag Link

why not cut the drag link and sleeve it with some DOM ? pics?
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Old 04-01-2014, 03:15 PM   #10
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Default Re: Left Hand Drill and Tap Drag Link

Yes it is dog legged at the pitman arm side. I am currently here at Gus' working on getting the axle under so I can measure for the link. Will be here all night til 10 or so.

And yes that was one option was to cut and leave the threads, section out the part I need to shorten, and weld and resleeve the threads back onto the end. I'm guessing about 6-8" need cut out.



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Old 04-01-2014, 03:18 PM   #11
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Default Re: Left Hand Drill and Tap Drag Link

And it is 1.25" OD.
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Old 04-01-2014, 03:30 PM   #12
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Default Re: Left Hand Drill and Tap Drag Link

Are you down on the root of the thread? 7/8 should be 0.875.
If I can dig up my tap I have no problem threading it for you. I'm not very comfortable cutting threads that small on the huge lathe that can handle that od.
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Old 04-01-2014, 03:39 PM   #13
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Default Re: Left Hand Drill and Tap Drag Link

If I bring it out to the edge of the thread, not in the thread, it measures like .829-.832 so I'm guessing 7/8.

I Would PREFER to leave it one piece and retap it for the LH end, but I'm not completely agains cutting and sleeving it if that's what it takes.
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Old 04-01-2014, 03:57 PM   #14
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Default Re: Left Hand Drill and Tap Drag Link

How about a weld in threaded insert?
I believe I have one that I won't need for awhile, you could use mine now and just order me a new one.
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Old 04-05-2014, 02:04 PM   #15
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Default Re: Left Hand Drill and Tap Drag Link

Yup. Here is how long it is. Axle is under and on it's own weight. Pitman is straight and link connected to it with the pass wheel straight too.





Going to look for the tap to see if someone can put the threads back in the DOM after it's cut to length.
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Old 04-05-2014, 02:20 PM   #16
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Default Re: Left Hand Drill and Tap Drag Link

Joe, is it a 7/8" insert? That might work. I could have it welded in after it's cut down. I would still need to drill out the DOM to fit the link in though.
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Old 04-05-2014, 09:15 PM   #17
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Default Re: Left Hand Drill and Tap Drag Link

Yeah 7/8" insert
What is the ID of the DOM?
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Old 04-05-2014, 09:19 PM   #18
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Default Re: Left Hand Drill and Tap Drag Link

Well just talked to Chris (AK_Ford) and we are picking up a tap and he is going to chop and tap it for me. Just gotta wait til it comes in. So in the mean time I am wrestling with the shotty exhaust. Trying to put the new headers on, and one of the bolts at the manifold flange is stripped.
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Old 04-05-2014, 09:37 PM   #19
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Default Re: Left Hand Drill and Tap Drag Link

Well just talked to Chris (AK_Ford) and we are picking up a tap and he is going to chop and tap it for me. Just gotta wait til it comes in. So in the mean time I am wrestling with the shotty exhaust. Trying to put the new headers on, and one of the bolts at the manifold flange is stripped.
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Old 04-05-2014, 09:41 PM   #20
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Default Re: Left Hand Drill and Tap Drag Link

For the stripped bolt hole in the manifold, if it is not too bad it can be HeliCoiled. If it is too far gone, drill and tap it for a thread two or three sizes larger, get a bolt that size, screw it into the hole until it bottoms and cut it off flush, drill and tap to the original size, you're done! Good luck!
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Old 04-06-2014, 08:53 AM   #21
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Default Re: Left Hand Drill and Tap Drag Link

It's in the flange between the manifold and YPipe. So I don't need to retap it. Just wanting to save the flange and YPipe to put back onto the shorty headers u am putting on as a temporary fix til I get enough stuff to completely redo the exhaust.
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