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  #1  
Old 6th September 2009, 06:22 PM
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aerosam aerosam is offline
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Default What threads are the maxi balljoints?

I bought my maxi balljoints as part of a package from somebody on the anti Chris Gibbs forum and unfortunately I only received 1 nut. Now I have the car as a rolling chassis the bottom wishbone just falls out with no nut to hold it on.

So what is the thread, and does anyone possibly have a spare nut?

Thanks!

Sam
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Old 8th September 2009, 01:03 PM
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surely somebody must know?
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Old 8th September 2009, 01:27 PM
Beardy_John Beardy_John is offline
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I got mine from ebay, and they came with nuts. I'll measure them up tonight, unless someone beats me to it
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Old 8th September 2009, 02:46 PM
londonsean69 londonsean69 is offline
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Quote:
Originally Posted by aerosam View Post
I bought my maxi balljoints as part of a package from somebody on the anti Chris Gibbs forum and unfortunately I only received 1 nut. Now I have the car as a rolling chassis the bottom wishbone just falls out with no nut to hold it on.

So what is the thread, and does anyone possibly have a spare nut?

Thanks!

Sam
Surely you have a caliper or steel rule and a thread guage. Most Tap & Die kits come with a thread guage. Having said that, mine is metric only.

Or just very gently try a few nuts on it to see if one fits.

I have a sneaky suspicion it might be imperial

Sean
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Old 8th September 2009, 05:28 PM
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I believe they are 7/16" UNF

Had a quick look but have every possible Nyloc nut other than that one
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Old 8th September 2009, 06:45 PM
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from memory i think they are to corse to be 7/16 but i could be wrong.
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  #7  
Old 8th September 2009, 08:23 PM
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Question Maxi ball joint thread

Right this is the best I can do

I have two different brands of ball joint, One is made by Veco & the other is made by QH.

Both have the same thread.

I have just put my digital caliper on them. In metric the diameter of the treaded part is 11.9mm

Now here is the problem

Both the 20 TPI & 1.25 thread gauges fit the thread.

My Osborne cutting tool guide lists the following Two possible sizes.

M12 X 1.25 is a standard metric fine thread

7/16" X 20 TPI this is listed as a UNF thread size

Looking at my metric conversion chart, it is noted that the mertic range for 7/16" is 11.112 - 11.5mm

So given the outside diameter of the thread, it is probable that the thread is M12 X 1.25 ( Metric fine )

But I would not still rule out the 7/16" UNF in view of the possibility that this component could pre-date the metric era.

Please remember, This information taken from my tool guide & intended as a guide only



With a little luck, some of the more able engineers on the forum will have an exact answer.
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Old 8th September 2009, 09:04 PM
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thanks guys.

An M12 nut will grip the first thread only then not screw down any further.

I can see me having to go and buy another balljoint just for the nut
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Old 8th September 2009, 09:24 PM
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A standard M12 metric nut will not fit

If it is a 12mm thread it will be a M12 X 1.25 thread pitch.

Probably your best option would be to vist your local steel stockist or engineering fixing stockist ( Take the joint with you ).
Either should be able to give you an exact answer.

Both 7/16" UNF & M12 X 1.25 are available on ebay
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  #10  
Old 8th September 2009, 11:44 PM
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just take it down the local fixings shop and get them to find a nut that fits it.

my local chap managed to get me m18 1.5 fine nyloc nuts. took him 2days to find them but those babys are like hens teeth

Last edited by AshG : 8th September 2009 at 11:48 PM.
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