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Standard Twin Pyramid Lugs

standard twin pyramid lugs

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#1 1940Twin OFFLINE  

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Posted December 16, 2017 - 07:41 PM

I'm currently looking into having some Standard Twin steel wheel pyramid lugs reproduced. The lugs on my one twin are completely worn down into the hollow center section and I'd like to have some authentic lugs to replace then with when I restore it. I've got a contact at a foundry and we're going to start designing the casting tooling. The tooling will be modeled in 3D CAD, then the intent is to use 3D print technology to create the core boxes and mold pattern.

The issue that I'm facing is that the wear on the lugs on both of the steel wheeled Twins that I own is such that it may be difficult to accurately reverse engineer the lugs to their original dimensions. I would like to inquire if anyone has a Twin where the pyramid lugs have minimal wear and would be willing to let me borrow one or two to get some accurate measurements. Any assistance would be greatly appreciated. Thanks.

Edited by 1940Twin, December 16, 2017 - 08:31 PM.

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#2 Rustysteele OFFLINE  

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Posted December 17, 2017 - 08:19 PM

I think I have a can of these lugs somewhere, as I remember they aren`t very worn. I`ll look tomorrow and see if I can find them and send you one. It would be great to have a source for these lugs!


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#3 1940Twin OFFLINE  

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Posted December 17, 2017 - 11:56 PM

I think I have a can of these lugs somewhere, as I remember they aren`t very worn. I`ll look tomorrow and see if I can find them and send you one. It would be great to have a source for these lugs!


That would be great! I was planning on having at least two sets produced (84 lugs total). If there is interest from others I can certainly plan to have more produced.

#4 Bob White12 OFFLINE  

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Posted December 18, 2017 - 12:15 PM

those casting might be pretty useful if you make em. are you going to make them cast iron or cast aluminum? 


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#5 1940Twin OFFLINE  

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Posted December 18, 2017 - 02:07 PM

The lugs would be produced from cast iron. Without going through a complete (and costly) metallurgical analysis, this is what we suspect the the original lugs were cast from.

Edited by 1940Twin, December 18, 2017 - 02:08 PM.


#6 Rustysteele OFFLINE  

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Posted December 22, 2017 - 07:51 AM

I finally found the can of lugs I have. I picked this one out as the least worn, it looks like it might even be NOS. If this one will work for you, let me know and PM me your address, I`ll ship it out to you so you can use it as a pattern. I`ll pay the shipping out to you and you can pay the shipping back. I would be interested in a set of these lugs too, depending on the price.DSCN5881.JPG DSCN5882.JPG


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#7 1940Twin OFFLINE  

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Posted December 22, 2017 - 03:40 PM

I finally found the can of lugs I have. I picked this one out as the least worn, it looks like it might even be NOS. If this one will work for you, let me know and PM me your address, I`ll ship it out to you so you can use it as a pattern. I`ll pay the shipping out to you and you can pay the shipping back. I would be interested in a set of these lugs too, depending on the price.attachicon.gifDSCN5881.JPGattachicon.gifDSCN5882.JPG

PM sent. Thanks.

Attached is a picture of one of the lugs from my 1938 Twin. There's much more wear to it than the one that you have. One interesting difference is your lug does not seem to have the prominent miss-match line on the lower inside face where the halves of the core came together. Most of the Twin lugs that I have seen have this mis-match feature in this area. I'm not sure it is NOS simply because of the amount of wear in the tip in comparison to what is shown in some of the Standard Twin literature (actual pictures, not the drawings). As noted in my PM however the walls and inner pocket of the lug you have look to be in good condition and will help with reverse engineering the design.

I've also attached a picture of a tractor that I found for sale earlier this year with lugs that look like they don't have much wear all. Unfortunately the seller was not interested in selling any of the lugs separately from the rest of the tractor. I'm going to look at calculating the theoretical "like new" height of the lugs by using the base width and outside surface angle and see if it comes to a logical number, such as 2.5" or 3", etc. The width of the lug tips in the picture look to be 0.25" or so, so I will factor this in as well.

Attached Thumbnails

  • IMAG5799.jpg
  • received_409095652772132.jpeg

Edited by 1940Twin, December 22, 2017 - 03:57 PM.

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#8 Rustysteele OFFLINE  

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Posted December 23, 2017 - 02:50 PM

I do have a never used extension rim from a Standard twin, at least it looks like it was never used. I`ll dig it out tomorrow, if the lugs look better, I`ll send you one of those instead. I doubt that these lugs had a sharp top to them, it would wear down too quickly in the field, I could see maybe a little more than the one I posted.



#9 Gtractor ONLINE  

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Posted December 23, 2017 - 03:18 PM

My extension rim lugs are much newer/longer/sharper than the regular wheel lugs.

Not a very good pic but its crammed in a shed and I had to climb on other tractors to get to it. 

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  • twin lug.jpg

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#10 Cat385B ONLINE  

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Posted December 23, 2017 - 03:50 PM

crammed in a shed and I had to climb on other tractors to get to it. 

 

Can we get a pic of that?

 


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#11 Rustysteele OFFLINE  

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Posted December 23, 2017 - 05:04 PM

Gtractor, what tractor is that on? That is more slender than the usual ones.



#12 Gtractor ONLINE  

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Posted December 23, 2017 - 05:29 PM

1936 Standard Twin

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  • standard twin.jpg


#13 Gtractor ONLINE  

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Posted December 23, 2017 - 05:37 PM

Can we get a pic of that?

Here you go Cat.  The flash didn't go off.  Sorry! 

 

black.jpg


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#14 DougT OFFLINE  

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Posted December 23, 2017 - 06:30 PM

I would have to do some checking but I think they offered different lugs in the catalog.


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#15 Gtractor ONLINE  

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Posted December 24, 2017 - 02:11 PM

Gtractor, what tractor is that on? That is more slender than the usual ones.

They are just like the lugs shown on the tractor in post 7.  The extension rims haven't been on my tractor all its life as the lugs are much less worn than the lugs on the main wheels - although the lugs are otherwise the same. 

 

?????


Edited by Gtractor, December 25, 2017 - 08:31 PM.

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