Top Saddle Support Arms

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tom_strickling
Posts: 388
Joined: Tue Jan 08, 2019 10:31 am
First Name: Tom
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* REQUIRED* Type and Year of Model Ts owned: 11 Torpedo, 18 Touring, 21 TT Huckster, 24 snowmpbile Staude and Shaw tractor conversions, Model T powered sickel bar mower
Location: New Philadelphia Ohio

Top Saddle Support Arms

Post by tom_strickling » Sun Mar 19, 2023 9:41 pm

I finally found top sockets for my 24 roadster. My new crisis is that I ordered top saddle support arms https://www.modeltford.com/item/3858B.aspx

The reproduced arms have an 11/16 fine thread. They would not screw in and when I looked into it, the area where mine screw into are either 1/2 or 5/8 coarse. (I dont remember which)

ANYWAY. Does anyone have information on the thread differences. Are the coarse thread arms available??
Thanks.
“The trouble with retirement is that you never get a day off.” – Abe Lemons.

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Humblej
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Re: Top Saddle Support Arms

Post by Humblej » Mon Mar 20, 2023 8:03 am

Tom, I am in the same boat.

ADDED 4/4 23:
[Correction, although a 5/8 bolt will screw into the hole it will slip when tightening, so the hole is larger than 5/8.]

Looking at period and factory photos it appears the top saddles and arms were not installed at the factory and a rubber plug was covering the hole in the body. If the arms and saddles were supplied as a loose part or in a bundle with the tool kit, is anyone's guess, I have not found any documentation either way. One factory photo shows the 15th million T getting its arms and saddles installed at the end of the line.
Last edited by Humblej on Tue Apr 04, 2023 5:05 pm, edited 1 time in total.


Topic author
tom_strickling
Posts: 388
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First Name: Tom
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* REQUIRED* Type and Year of Model Ts owned: 11 Torpedo, 18 Touring, 21 TT Huckster, 24 snowmpbile Staude and Shaw tractor conversions, Model T powered sickel bar mower
Location: New Philadelphia Ohio

Re: Top Saddle Support Arms

Post by tom_strickling » Mon Mar 20, 2023 8:09 am

Thanks again Jeff.

I am going to see if the 11?16 could be turned into 5/8 by my machinist. I am sure he will think of something. I will let you know.
“The trouble with retirement is that you never get a day off.” – Abe Lemons.

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Mark Gregush
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Re: Top Saddle Support Arms

Post by Mark Gregush » Tue Mar 21, 2023 3:57 am

Posted new information after doing some checking.
Last edited by Mark Gregush on Tue Mar 21, 2023 2:49 pm, edited 1 time in total.
I know the voices aren't real but damn they have some good ideas! :shock:

1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup


Topic author
tom_strickling
Posts: 388
Joined: Tue Jan 08, 2019 10:31 am
First Name: Tom
Last Name: Strickling
* REQUIRED* Type and Year of Model Ts owned: 11 Torpedo, 18 Touring, 21 TT Huckster, 24 snowmpbile Staude and Shaw tractor conversions, Model T powered sickel bar mower
Location: New Philadelphia Ohio

Re: Top Saddle Support Arms

Post by tom_strickling » Tue Mar 21, 2023 8:43 am

The description in their catalog says 11/16.

I just assumed they would work I guess
“The trouble with retirement is that you never get a day off.” – Abe Lemons.

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Mark Gregush
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Re: Top Saddle Support Arms

Post by Mark Gregush » Tue Mar 21, 2023 2:48 pm

All 4 that I have, 2 fender supports and 2 for my roadster top rest, are 16 TPI. Mine measure about between .665 and .675 on the outside of the thread.
There is a good possibility that the ones you have are correct and there are issues with the holes you are trying to screw into. Don't know, can't see what you are working with.
Added more information in my post down below. There is an 11/16 X 16 TPI tap made.
Last edited by Mark Gregush on Wed Mar 22, 2023 12:07 pm, edited 1 time in total.
I know the voices aren't real but damn they have some good ideas! :shock:

1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup


Scott_Conger
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Re: Top Saddle Support Arms

Post by Scott_Conger » Tue Mar 21, 2023 3:31 pm

tap drill for 3/4" thread: .656 (coarse), 21/32 (fine)

FWIW, while not common, 11/16 diameter can be found in 11,12, 16, 20, 24, 28, 32 TPI (just in American sizes...a couple more in British sizes)

11/16 might not be found in standard tap/die sets, but that only means the set is incomplete due to low use of that size
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Mark Gregush
Posts: 4956
Joined: Sat Jan 05, 2019 1:57 pm
First Name: Mark
Last Name: Gregush
* REQUIRED* Type and Year of Model Ts owned: 1925 cutdown PU, 1920 Dodge touring, 1948 F2 Ford flat head 6 pickup 3 speed
Location: Portland Or
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Board Member Since: 1999

Re: Top Saddle Support Arms

Post by Mark Gregush » Tue Mar 21, 2023 4:29 pm

I just looked on line and found one on MacMaster Carr:
https://www.mcmaster.com/taps/thread-size~11-16-16/
Yes, there are lots of other sizes, not all are listed on most tap/die/drill charts.
I know the voices aren't real but damn they have some good ideas! :shock:

1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup

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