OT - M&W micrometer adjusting spanner?
Harry Bloomfield
I have an old Moore & Wright micrometer, which needs a little
adjustment to get the zero accurate and maybe strip down for a clean,
unfortunately it came without the little spanner. It is a little over
2" long, with a C at one end, an open ender at the other and I
understand it is standard spanner for all models. I wonder if anyone
might have one surplus to their needs?
--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk
Dave
> Long shot I know, but...
>
> I have an old Moore & Wright micrometer, which needs a little adjustment
> to get the zero accurate and maybe strip down for a clean, unfortunately
> it came without the little spanner. It is a little over 2" long, with a
> C at one end, an open ender at the other and I understand it is standard
> spanner for all models. I wonder if anyone might have one surplus to
> their needs?
You don't need it for a strip down and clean, but can't you make
something that will let you adjust it? It's only a pin on an arc.
Dave
Harry Bloomfield
I have already tried to make one - it just wasn't strong enough to
budge it.
Dave
Yes, they are quite stiff to move.
I only have the one for my 0.0001 model, or I would have lent you it.
Dave
andrew
I've had mine for 40 years and the supplied spanners never did undo the two
lock rings, so I've always allowed for the offset.
AJH
Andy Dingley
wrote:
> I have an old Moore & Wright micrometer, which needs a little
> adjustment to get the zero accurate
Drill bit, used radially. You can get a good fit in the hole and
provided it's not stuck, there's enough leverage to adjust. Just
remember to hold it radially and don't knacker the hole edges.
Dave
What you wrote prompted to get mine out, micrometer, that is :-)
It doesn't have two lock rings, just an adjuster to take out the
backlash in the screw thread and the ability to rotate the fixed barrel
that has the 1/10000 vernier scale on it. As I wrote earlier, they are
very stiff to move.
Harry, do you have a kitchen strap wrench? That might be worth looking
at, they are very cheap.
Dave
Frank Erskine
wrote:
>What you wrote prompted to get mine out, micrometer, that is :-)
>
>It doesn't have two lock rings, just an adjuster to take out the
>backlash in the screw thread and the ability to rotate the fixed barrel
>that has the 1/10000 vernier scale on it.
I think you probably mean 1/1000...
:-)
--
Frank Erskine
John
"Frank Erskine" <frank....@btinternet.com> wrote in message
news:a6fbm59grpronl30p...@4ax.com...
A M&W Micrometer can (optionally) have an additional vernier scale around
the sleeve to enable you to estimate 10,000 of an inch.
John
"John" <Who90...@ntlworld.com> wrote in message
news:ymk9n.219463$FH.1...@newsfe03.ams2...
This link should take you to an illustration that shows the optional vernier
scale. For 0.0001"
http://www.moore-and-wright.com/images/cms/File/Downloads/M_and_W_Poster.pdf.
Nowadays people seem to have too much reliance on digital instruments -
forgetting that the method of measuring still needs to be sound.
John
>>
>
> This link should take you to an illustration that shows the optional
> vernier scale. For 0.0001"
> http://www.moore-and-wright.com/images/cms/File/Downloads/M_and_W_Poster.pdf.
>
> Nowadays people seem to have too much reliance on digital instruments -
> forgetting that the method of measuring still needs to be sound.
>
Alternative view of the vernier giving 0.0001 reading ability.
http://pgiinc.com/howtoreoumi.html
andrew
> It doesn't have two lock rings, just an adjuster to take out the
> backlash in the screw thread and the ability to rotate the fixed barrel
> that has the 1/10000 vernier scale on it. As I wrote earlier, they are
> very stiff to move.
I was talking at cross purposes then, mine is a 0-1" and 1"-2" with two
separate anvils to change the range. The anvils each have two lockrings
with notches for a C spanner.
AJH
Harry Bloomfield
I was going to 'make' one (just a bit of cord and a nail) to try
turning the barrel, but I do also need to strip it down to give it a
good clean and lub.. The only thing which is out, is the course
calibration along the barrel - the zero mark is about 7 thou out. The
fine calibration is spot on. I rather suspected that turning the barrel
would set up both the course and fine calibration marks.
Dave
No, it is capable of measuring down to one ten thousand of an inch.
Dave
Harry Bloomfield
> Long shot I know, but...
>
> I have an old Moore & Wright micrometer, which needs a little adjustment to
> get the zero accurate and maybe strip down for a clean, unfortunately it came
> without the little spanner. It is a little over 2" long, with a C at one end,
> an open ender at the other and I understand it is standard spanner for all
> models. I wonder if anyone might have one surplus to their needs?
An hour ago I managed to track one down - Mitchell Fox, Leeds ￜ2.29
each if anyone else might need one.
John
"Harry Bloomfield" <harry...@NOSPAM.tiscali.co.uk> wrote in message
news:mn.0bee7da2e0...@NOSPAM.tiscali.co.uk...
> Harry Bloomfield expressed precisely :
>> Long shot I know, but...
>>
>> I have an old Moore & Wright micrometer, which needs a little adjustment
>> to get the zero accurate and maybe strip down for a clean, unfortunately
>> it came without the little spanner. It is a little over 2" long, with a C
>> at one end, an open ender at the other and I understand it is standard
>> spanner for all models. I wonder if anyone might have one surplus to
>> their needs?
>
>
> --
> Regards,
> Harry (M1BYT) (L)
> http://www.ukradioamateur.co.uk
>
>
Good luck. Make this adjustment after you have adjusted the nut that
tightens the thread.