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Track Rod End Screw Thread

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Track Rod End Screw Thread
Chris KC Offline
GO 6285
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Location: Darkest Bedfordshire
#1
06-10-2022, 10:23 PM
I believe the track rod end adjustment thread is 3/4" x 20 tpi - would I be correct in guessing it's Whitworth thread form rather than BSC? Anyone know please?
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Charles P Offline
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#2
07-10-2022, 10:45 AM
(06-10-2022, 10:23 PM)Chris KC Wrote: I believe the track rod end adjustment thread is 3/4" x 20 tpi - would I be correct in guessing it's Whitworth thread form rather than BSC? Anyone know please?

Pretty certain it's whitworth. 
I have a die if you want to borrow one

Charles
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blackshed Offline
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Location: Uckfield
Car type: 1930 Ulster
#3
07-10-2022, 04:25 PM
3/4" 20tpi  is a Cycle Tread as far as I know
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Chris KC Offline
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#4
07-10-2022, 06:07 PM (This post was last modified: 07-10-2022, 06:08 PM by Chris KC.)
(07-10-2022, 04:25 PM)blackshed Wrote: 3/4" 20tpi  is a Cycle Tread as far as I know

Tracy Tools' website offers 3/4" x 20 in both BSC and Whitworth thread forms. 
The two are different though (BSC is a 60 degree tooth angle vs 55 for Whitworth).
(07-10-2022, 10:45 AM)Charles P Wrote:
(06-10-2022, 10:23 PM)Chris KC Wrote: I believe the track rod end adjustment thread is 3/4" x 20 tpi - would I be correct in guessing it's Whitworth thread form rather than BSC? Anyone know please?

Pretty certain it's whitworth. 
I have a die if you want to borrow one

Charles

Thanks Charles - I've sent you a p.m.
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Chris KC Offline
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Joined: Aug 2017 Posts: 3,388 Threads: 105
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Location: Darkest Bedfordshire
#5
13-10-2022, 11:56 AM
Just for closure, Charles very kindly lent me his whitform thread die and the new thread is indistinguishable from old by eye.
The job is now done, back on the car and functioning.

Charles, I have p.m.'d you - don't forget to send me your return address!!
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