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tips, technology, tools and techniques related to vehicle driveline components

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soi6
Tim east

(49 posts)

Registered:
06/24/2018 06:40PM

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: soi6
Date: January 27, 2021 03:39PM

ok thanks for that, I was talking to an retired AP lockeed development engineer about this, he sugggested that I should bore out the solid forgings say 1/2", but not right through to the ends, i like the sound of that.


Jim Stabe
Jim Stabe
San Diego, Ca
(787 posts)

Registered:
02/28/2009 10:01AM

Main British Car:
1966 MGB Roadster 350 LT1 Chevy

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: Jim Stabe
Date: January 27, 2021 11:25PM

Art - You aren't going to "tap out" a .004 press fit if you mess up the clocking.


soi6
Tim east

(49 posts)

Registered:
06/24/2018 06:40PM

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: soi6
Date: January 28, 2021 07:51AM

One end could be that tight given you only need to ajust one end if you get it wrong.


Jim Stabe
Jim Stabe
San Diego, Ca
(787 posts)

Registered:
02/28/2009 10:01AM

Main British Car:
1966 MGB Roadster 350 LT1 Chevy

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: Jim Stabe
Date: January 28, 2021 11:13AM

If you are doing the .004" press fit for strength then leaving the other end loose defeats the purpose. It's that "weakest link" thing. The strength comes from the weld.


soi6
Tim east

(49 posts)

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06/24/2018 06:40PM

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: soi6
Date: January 29, 2021 08:23AM

Sure, but I would rather have two weak links than four.


roverman
Art Gertz
Winchester, CA.
(3089 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: roverman
Date: February 03, 2021 04:43PM

.004" press is all relative. Thin tubing in that diameter has "stretch". Just did one for my 1 T. diesel truck. Heavier wall and .003-.004" press. Likely I could have drove around the block, un-welded. I'm NOT suggesting. I suspect IF you got index off by 1/16", not likely to feel it. More important, it is straight. Art.


soi6
Tim east

(49 posts)

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06/24/2018 06:40PM

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: soi6
Date: February 06, 2021 12:08PM

Im trying to add a pic.......question I need to change my stud PCD, I would like to keep the same wheel studs all round, do you think 4 stud's will cope on a mgbgt with 400 bhp?



soi6
Tim east

(49 posts)

Registered:
06/24/2018 06:40PM

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: soi6
Date: February 06, 2021 12:14PM

jag shafts.jpg


MGBV8
Carl Floyd
Kingsport, TN
(4034 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: MGBV8
Date: February 08, 2021 10:17AM

"do you think 4 stud's will cope on a mgbgt with 400 bhp?"

Yes, I do.

There are many, many heavy hitter Hondas & Miatas still running 4 lug wheels and doing it at the dragstrip & on road courses.


soi6
Tim east

(49 posts)

Registered:
06/24/2018 06:40PM

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: soi6
Date: February 14, 2021 08:07PM

Ive drilled the hubs to MGB PCD 4 stud, as Id rather have the same all round. Ill be mounting the axle in the car soon.Thanks for all the help!


Jameson4170
Jame Son

(3 posts)

Registered:
02/22/2021 05:35AM

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: Jameson4170
Date: February 22, 2021 05:42AM

On the off chance that you need to utilize TIG you presumably ought to do a hefty preheat and utilize a great deal of filler bar. Yet, with that much warmth in a little zone steps should be taken to dodge warpage, for example, by rotating sides. The weighty preheat will likewise help significantly paying little mind to the technique you use.


Jameson4170
Jame Son

(3 posts)

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02/22/2021 05:35AM

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: Jameson4170
Date: February 22, 2021 05:51AM

It relies upon what material the "cast" drive shaft closes are made of. Cast iron or cast steel. I particularly question they are solid metal so I will answer dependent on them being projected steel.

The welding relies upon the synthetic piece of the projecting, as it has a critical obligation you can anticipate that it should contain raised chrome and manganese levels for strength, yet with this would come expanded degrees of carbon and potential for hardness.

To beat higher carbon content I would recommend a high preheat of the projecting (400c in addition to) before welding and keep up this warmth during welding in the event that you can. At that point envelop by high temp protection straight in the wake of welding (exhaust wrap on the off chance that you have it) to control the cooling rate.

I would actually utilize a 1% nickel wire to give additional strength yet additionally to add some extra alloying component to the cast/weld pool zone.

A decent marker to check for expanded carbon and hardness is to perceive how a tack weld acts. Do a respectable tack weld on the material (when cold) that weakens both parent materials (cast and CDS) and afterward attempt and move it or adjust it until it breaks. At that point check the area of the crack ( mid weld/on the cast as we approve of the CDS) in the event that it breaks simple and shows a dim fine grain you have high carbon. On the off chance that flexes and yeilds and shows a roughish grain, it may not be high carbon as it showed pliable crack properties.

Whatever you have, pre and post warmth is vital.

Expectation this makes a difference.


Jim Stabe
Jim Stabe
San Diego, Ca
(787 posts)

Registered:
02/28/2009 10:01AM

Main British Car:
1966 MGB Roadster 350 LT1 Chevy

authors avatar
Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: Jim Stabe
Date: February 22, 2021 10:56AM

The Jag shafts are forged.


soi6
Tim east

(49 posts)

Registered:
06/24/2018 06:40PM

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: soi6
Date: February 27, 2021 06:45PM

Jim Blackwood, Im monting the axle to the car,I see this showing the relationship between the diff & the body, what ride hight is the car when the diff is mounted using the cross bar to the spring hangers? thanks
mg axle.jpg


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6003 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: BlownMGB-V8
Date: February 28, 2021 12:36PM

Depends on how you build it Tim, it can be basically whatever you want. What you need to watch closely is the clearance between the uprights and the MG frame members. That will determine minimum possible ride height as well as suspension travel. Inner fender/tire clearance runs a close second.

Jim



soi6
Tim east

(49 posts)

Registered:
06/24/2018 06:40PM

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: soi6
Date: March 01, 2021 08:36AM

Im going to add box section above the frame sections then remove as required to get me the full clearance I need, what ride height did that give you? thanks


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6003 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: BlownMGB-V8
Date: March 01, 2021 12:03PM

Depends on tire size and suspension travel on the compression side, which depends on spring rate and coil-over mounting angle. Don't get your upper mount too close to the bodywork. Also depends on what part comes closest to the body. For reference, use the diameter of your stock axle height of the bump stop, and of the bump stop pad on the axle. Shouldn't be too hard to do better than that.

Jim


soi6
Tim east

(49 posts)

Registered:
06/24/2018 06:40PM

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: soi6
Date: March 03, 2021 03:36PM

Yeah ok, now Im working out ride hights its rather high at the front, I have 15" wjheels & a chrome bumper front clip, I'll have to modify the the stub axle's to get the front down, at the moment its just too high.


soi6
Tim east

(49 posts)

Registered:
06/24/2018 06:40PM

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Re: TIG Rods For Welding Jag Drive Shafts?
Posted by: soi6
Date: March 06, 2021 09:00PM

Ive cut a little from the top of the alloy hub & along with some of the steel frame it now has loads of clearance, the box section is in fact two sections, so the lower section only removed does the job.
jag hub.jpg
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