Thanks for all the help, and also the emails from others that knock my
stupidity. I know about destroying this instrument, I was very careful not
to do that. I still like to know how I make any part of it move though. I
think it is the part that is missing on the top, the screw and the fat
washer, as noticed on one of the pictures. Thanks BTW for the address to get
to the explanation of some of my questions. I think I will call or email a
place that sells these things. Happy Holidays to all of you........Peter
"Gary Owens" wrote in message
...
OK, lets see, new they run about 3K, used on EBay about 300, and you want
to take it apart. good luck.
EBay
Mitutoyo 515 312 12" height master gage tool tools
US $308.88
http://www.mitutoyo.co.jp/eng/produc...ijunki_01.html
gary
"DoN. Nichols" wrote in message
...
On 2007-12-24, PeterM wrote:
I have this tool that I like to sell, but I can't figure out how the
darn
square blocks move. It has that turn dial with handle for it, but I can
turn
and turn and turn, nothing happens. This instrument looks great, and
nothing
is broken or anything visible. The only thing it has missing is the top
screw that holds down the dial cap or whatever they call it. I found a
screw
with the same thread, and tightened it just a little, but still nothing
moves when I turn it. Any help is appreciated. I can't find any help on
line
anywhere......BTW I'm selling or trading it for 175.- just in case
someone
is interested. I'm in the Sacramento area
Is this one of the devices with a stack of gauge blocks 0.500"
high alternating in and out with a *big* micrometer head at the top?
(Perhaps you could post an image of it to the dropbox (see
http://www.metalworking.com and read the 'how to use the dropbox"
instructions -- then once you have the image posted there, you post here
the name of the image (and the URL of the dropbox for those who forget)
and let us look at it.
If it is what I think it is -- the whole stack of gauge blocks
moves up and down around a large diameter shaft under control of a large
micrometer -- something like a 4" diameter thimble, and calibrated
*directly* in units of 0.0001" (or equivalent resolution in metric
units, with metric gauge blocks instead of the 0.500" imperial ones.
Anyway -- what you have suggested later sounds like a very quick
way to destroy a precision instrument.
The micrometer thimble (what I think you are calling "the dial
cap" normally fits to the threaded spindle via a taper and has to be
held down firmly to that taper by a threaded knob so it rotates the
shaft when the thimble is rotated.
So -- *please* find out more about it before taking a hammer to
it. You may need a penetrating oil to free up gummed lubricant on the
sliding bearings on the column. Also -- the gauge blocks may have
rusted surfaces, in which case they probably have little accuracy left,
and the major value of what you have is the big micrometer head.
Note that a replacement stack of the gauge blocks can cost well
over $1000.00.
Good Luck,
DoN.
--
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---