Hub Cap threads

Discuss all things Model T related.
Forum rules
If you need help logging in, or have question about how something works, use the Support forum located here Support Forum
Complete set of Forum Rules Forum Rules
User avatar

Topic author
TonyB
Posts: 449
Joined: Fri Jan 04, 2019 11:15 am
First Name: Tony
Last Name: Bowker
Location: Ramona, CA
MTFCA Number: 32
MTFCA Life Member: YES
Board Member Since: 2005

Hub Cap threads

Post by TonyB » Fri Oct 25, 2019 8:31 pm

I’m still working the 1909, today I managed to get all four wheels mounted. They still don’t have rubber and are still unpainted but now I know most things fit.
Notice “most”. The rear hubs are too large for the hub caps. I tried later hub caps and they don’t fit and the 09 hub caps fit the later wheels I had been using. So the problem is the specially made rear hubs. These are custom made hubs that look like the 1909 hub for a straight axle but have the internal taper.
The threads on all my regular T hubs and caps appear to be 24 tpi.
I measured outside diameter of the regular T hub at 2.114” plus or minus 0.001”, measured on several old hubs.
The hubs on these custom hubs are 2.139” external diameter.
Can anyone confirm the dimensions of the regular T hub?
Tony Bowker
Ramona, California
1909 Touring, 1914 Touring, 1915 Speedster, 1924 Coupe.

User avatar

CudaMan
Posts: 849
Joined: Fri Jan 04, 2019 4:17 pm
First Name: Mark
Last Name: Strange
Location: Hillsboro, MO
MTFCA Number: 30944
MTFCI Number: 23667
Board Member Since: 2013

Re: Hub Cap threads

Post by CudaMan » Sat Oct 26, 2019 9:06 am

I just measured a rear hub on my 1924 and it measures 2.139" diameter and 24 threads per inch. :)

Here are a couple of earlier threads on hubs that may prove helpful:

http://www.mtfca.com/discus/messages/80 ... 1239905425

http://www.mtfca.com/discus/messages/50 ... 1444951839
Mark Strange
Hillsboro, MO
1924 Cut-off Touring (now a pickup)

User avatar

Topic author
TonyB
Posts: 449
Joined: Fri Jan 04, 2019 11:15 am
First Name: Tony
Last Name: Bowker
Location: Ramona, CA
MTFCA Number: 32
MTFCA Life Member: YES
Board Member Since: 2005

Re: Hub Cap threads

Post by TonyB » Sun Oct 27, 2019 12:31 am

Today was the first day of the San Diego Speedster Endurance Run and I measured the hubs on several Model Ts. They were all between 2.108” to 2.115” so now I know what I need to machine the custom hubs. 😊
Tony Bowker
Ramona, California
1909 Touring, 1914 Touring, 1915 Speedster, 1924 Coupe.


Leaford Burnett
Posts: 11
Joined: Wed Jan 22, 2020 8:25 pm
First Name: Leaford
Last Name: Burnett
Location: Ceresco NE
MTFCA Number: 408
MTFCA Life Member: YES

Re: Hub Cap threads

Post by Leaford Burnett » Sun May 10, 2020 2:10 pm

I'm workimg on a 1923 roadster and i have 3 hubs with outside diameter on threads measure 2.108 to 2.115 but the left front hub measures 2.127 to 2.139 So what did you do to machine your oversize hub threads, have them recut on lathe? this looks difficult as theres not much metal on inside of bearing race and the thread chase die I bought won't fit over, but threads needs to fit hub cap to hold in grease any advise greatly appreciated


Allan
Posts: 1474
Joined: Sun Jan 06, 2019 7:21 pm
First Name: Allan
Last Name: Bennett
Location: Gawler, Australia

Re: Hub Cap threads

Post by Allan » Sun May 10, 2020 11:02 pm

This may be the occasion where the special Stevens tool for chasing the hubcap threads would come in handy. This tool can be started on the threads to clean them up. It does not rely on having good threads of the correct size to start onto the hub. The tools are scarce, but if one can be borrowed, with its owner/operator if needs be, it may be the easiest way around the problem.

Allan from down under.

User avatar

Steve Jelf
Posts: 2775
Joined: Fri Jan 04, 2019 9:37 pm
First Name: Steve
Last Name: Jelf
Location: Parkerfield, Kansas
MTFCA Number: 16175
MTFCI Number: 14758
Board Member Since: 2007
Contact:

Re: Hub Cap threads

Post by Steve Jelf » Mon May 11, 2020 12:24 am

The Stevens 181 thread tool is rare and expensive, but it can be copied. Awhile back Andre in Belgium posted photos of his very nice home made version. I intend to make one someday when I get a round tuit. :)
The inevitable often happens.
1915 Runabout
1923 Touring


Leaford Burnett
Posts: 11
Joined: Wed Jan 22, 2020 8:25 pm
First Name: Leaford
Last Name: Burnett
Location: Ceresco NE
MTFCA Number: 408
MTFCA Life Member: YES

Re: Hub Cap threads

Post by Leaford Burnett » Mon May 11, 2020 8:44 am

I,m intrigued by this "Stevens Tool" you say it was posted to MTFCA,s disussion page? I will search for it, thanks for the responce, in the mean time I have found a solution by sawing 3 short cuts, 120 degrees apart and about 3/8 inch deep around the parimeter of hub cap this allowed the cap to expand enough to thread on to hub, hold the grease in/dirt out and isn't very noticable, not to mention cheap as new reprodution hub caps cost about $17.00 plus postage
Thanks again Stay home/Stay healthy

User avatar

Steve Jelf
Posts: 2775
Joined: Fri Jan 04, 2019 9:37 pm
First Name: Steve
Last Name: Jelf
Location: Parkerfield, Kansas
MTFCA Number: 16175
MTFCI Number: 14758
Board Member Since: 2007
Contact:

Re: Hub Cap threads

Post by Steve Jelf » Mon May 11, 2020 10:31 am

I misremembered. It was Toon who made the tool, not Andre. Photo is here, and pictues of the Stevens 181.
https://www.mtfca.com/phpBB3/viewtopic.php?f=2&t=4649


Here's another picture of the 181:
IMG_2541 copy.JPG
The inevitable often happens.
1915 Runabout
1923 Touring


Dan Hatch
Posts: 1120
Joined: Tue Jan 08, 2019 7:31 pm
First Name: Dan
Last Name: Hatch
Location: Alabama
MTFCA Number: 49974

Re: Hub Cap threads

Post by Dan Hatch » Mon May 11, 2020 2:09 pm

Jack Putnam was making them. Do not think he made any more. Dan

User avatar

George Mills
Posts: 179
Joined: Sun Jan 06, 2019 12:32 pm
First Name: George
Last Name: Mills
Location: Cherry Hill NJ/Anona Largo FL
MTFCA Number: 29497
MTFCI Number: 10032
Board Member Since: 1999

Re: Hub Cap threads

Post by George Mills » Tue May 12, 2020 3:31 pm

I had new reproductive caps that were real tight. I ordered one of the modern thread restorers but before it came I did try something.

Thread would start...but not go...using the hubcap wrench I’d go half turn on, quarter turn off, repeat until hubcap fully seats. Didn’t crack, still on the car...that tool eventually arrived...haha...I’ve managed to loan it out a dozen times or so now...it has thread blade inserts for just about every TPI known.

User avatar

Will_Vanderburg
Posts: 279
Joined: Sun Jan 06, 2019 3:59 pm
First Name: William
Last Name: Vanderburg
Location: Jackson, NJ
MTFCA Number: 28382

Re: Hub Cap threads

Post by Will_Vanderburg » Wed May 13, 2020 3:58 pm

And to think I either heard or read that repair shops used to slap hub caps back on with a mallet
William L Vanderburg

1925 Touring
1922 Center Door Sedan

Post Reply Previous topicNext topic