[TheForge] Fw: Machine screw size?

[David E. Smucker]

Any other marking or name on anything?  Place of manufacture?  Any guess on 
age?

If it was British made (as many older planes were) and it is pre-metric then 
it is most likely a Whitworth thread.  They are 55 degrees vs. the USA and 
metric threads that are 60 degrees.  You will not find these anywhere easy 
in the states except maybe somewhere on the web.  Older British cars also 
used the Whitworth thread form, as did older British guns.

Hell, if your not trying to "restore" it then just tap it out -- of course 
you will destroy its value to collectors -- old planes go for a bunch among 
tool collectors.

Then again it may be metric.  Bike stores will have smaller metric bolts.

Dave

--------------------------------------------------
From: "CGRAF" <adveniam at att.net>
Sent: Tuesday, June 23, 2009 2:47 PM
To: "Blacksmithing List Sponsored by ABANA" <theforge at mailman.qth.net>
Subject: Re: [TheForge] Machine screw size?

>
> You might want to join and ask this question on
> the oldtools list.
> http://ruckus.law.cornell.edu/mailman/listinfo/oldtools
>
>
> Mike Graf
>
> Jeff & Leslie wrote:
>> Today in a trash pile I found a little 1" wide blade, plane.  I found 
>> three
>> pieces, the body, the blade, and the "wedge" that slips over the blade 
>> and
>> tensions it when a screw is tightened thru this piece against the blade.
>> I'm trying to find the screw and nothing I have fits.  A 10 - 32 starts
>> easily and then after 1/8" it won't go anymore.  I don't have a metric 
>> that
>> small so maybe that's it.  Anyone familiar with this situation and have a
>> guess as to what size it is.  I could run a 10 - 32 tap thru it, or go to
>> lowes and see if anything fits.  Thanks,
>>
>> Jeff in WTF is it this hot Tallahassee
>>
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