Rountuits keep arriving, from whence I know not.

Got out my MF #67 router plane for a good clean up.  There's a bit of 
oxidation and some crud.  I can deal with both, but I ran into something 
that I need help with.

There is an upright threaded rod which has depth adjustment thumbscrew 
an a thumbscrew that holds the holding bracket that fixes the blade in 
place.  I would like to remove this threaded rod to assure full cleaning 
and rust removal on all parts of the thread.  I don't have a thread 
gauge at hand; so I can't determine the number of threads per inch.  My 
search fu remains weak.  I have not found a web page that provides that 
information. My plan is to put 2 nuts of the proper threading on the 
post, lock them together and remove the post.

1)  Is my approach OK or is there a better way to do this?

2)  Does anyone know the thread pitch for the MF #67, or a URL where I 
can find that datum?

Thanks in advance.

Bob Hutchins
Temple, TX

Bob wrote:
> 
> I don't have a thread gauge at hand; so I can't determine the number of
threads per inch.

This sounds like you have a clear need for another tool, namely the thread gage.
Clearly, this is a moment that a galoot should relish!

Consider that if it is in fact an oddball thread then finding matching nuts may
be challenging!!!

I’d try-fit nuts of the standard coarse and fine threads for that diameter.  If
you find a fit, that is your de facto thread gage!

Proceed carefully!  That rod may be “staked” into the base with a deliberately-
distorted thread so that it is a jam-fit.  Forcing this to unscrew may leave it
as a too-loose fit.

Use penetrating oil a few days before you apply torque to that rod.  (I prefer
Kroil from www.kanolabs.com)

It might be best to simply not remove that rod.  If all the corrosion & crud are
removed from the exposed part of the rod, then removing the rod from the casting
might be a case of “don’t fix it if it ain’t busted.”

YMMV!
John Ruth

Bob,

1) Sounds like a workable solution to me

2) I don't have a No. 67 (open throat MF router plane) but do have a No. 77
(closed throat MF router plane).  I just used a thread gauge on it and confirmed
with a die on the post that mine is 1/4-28.  I guess MF standardized on common
threads more than Stanley at least for router planes.

Ed O'

-----Original Message-----
From: OldTools [mailto:oldtools-bounces@s...] On Behalf Of RH

Rountuits keep arriving, from whence I know not.

Got out my MF #67 router plane for a good clean up.  There's a bit of oxidation
and some crud.  I can deal with both, but I ran into something that I need help
with.

There is an upright threaded rod which has depth adjustment thumbscrew an a
thumbscrew that holds the holding bracket that fixes the blade in place.  I
would like to remove this threaded rod to assure full cleaning and rust removal
on all parts of the thread.  I don't have a thread gauge at hand; so I can't
determine the number of threads per inch.  My search fu remains weak.  I have
not found a web page that provides that information. My plan is to put 2 nuts of
the proper threading on the post, lock them together and remove the post.

1)  Is my approach OK or is there a better way to do this?

2)  Does anyone know the thread pitch for the MF #67, or a URL where I can find
that datum?

Thanks in advance.

Bob Hutchins
Temple, TX