I'm pretty sure the grease fitting has a pipe thread. It's most likely a
1/8" pipe thread. This is a taper thread with 27 tpi, (not 28) and has a
pitch diameter at the smallest end of the taper of .363 ins. I can see how
it could be easily confused with a 3/8' UNF thread. 1/8" pipe taps can be
obtained at any hardware store. The 1/8" is NOT a typo - the 1/8" refers
to the nominal size of the pipe, not the thread diameter.
----- Original Message -----
From: "suhring" <suhring@lancnews.infi.net>
To: "triumph mailing list" <triumphs@autox.team.net>
Cc: "John Krause (home)" <jktr250@aol.com>
Sent: Tuesday, October 24, 2000 9:22 PM
Subject: Grease Nipple Lower Wishbone
>
> Has anyone retapped the threads for the grease nipple that goes
> on the lower wishbone for a TR3? My threading has gone bad and I can't
> fit a new grease nipple on the arm. As far as my measurements go, it
> is a 3/8"-28 NF. It's the 28 thread pitch that I can't find.
>
> Does anyone know a source for these odd tap sizes or have a spare
> Right/Front wishbone?
>
> TIA
>
> Scott Suhring
> Elizabethtown, PA
> '70 TR6
> '59 TR3
|