|This mike reads to 0.000,05" i.e. 50
millionth's of an inch. Most 0-1" mikes only read to
0.001 or a thousandth of an inch, but then there's not
much point in getting one if your calipers can make the
In the photo at left the mike is showing 0.05950" where the right most digit is either 0 or 5.
The problem with calipers is than when measuring things that are thin you can't get much accuracy.
Also in the photo above is a set of 50 gauge pins from 0.011 to 0.060" in 0.001" steps all on the minus side of nominal. Hopefully they will fill another weakness of the Vernier Calipers and that's measuring the inside diameter of small holes. The problem with the calipers is that the flat on the tips are a little under 0.020" so when measuring a small hole they report the I.D. a little smaller than it really is. Using pins should me much more accurate for small holes.
The third item in the photo is a mike stand. I got three different models to see which one I liked the best. The one shown is the heaviest at 3 lb 20 oz and has about as small a foot print of any of the others. For measuring small items that can be brought to the mike the stand sure is great. Of course the mike can easily be removed to measure things not easily brought to the stand.
Let me know about the cable needed for remote readout.
9 March 2008- replaced the LR44 battery in the mike. Also known as AG13. 1.55 Volts 11.5 mm diameter 5.65mm hi. Positive toward cap.
M-1 .061 to .250 Plus
This pin gauge set is a continuation of the smaller set. The box is 11" x 7½" x 2½" compared to the 4" x 3" x 2" for the smaller set.
The mike is holding a pin reading 0.08010 which is inserted into the solder cup of a 5590BA Battery Adapter socket. This is the diameter that determines what wire size will fit. Without this pin gauge set it could not be measured accurately. I tried using two pins from the smaller set and the answer was an ID that was too small.
* measure the ID of a solder cut
* measure the ID of shrink tube
* measure the hole where the high current output screw fits on the EL1132 Electronic Load. Note the Screw Chek'R will not accept the screw in 10-32 but it's very loose in 12-32. The OD says it's a #10. The mating hole accepts a pin that's the size of a 10-32 tap drill. So the screw is a 10-32 but a little on the big side.
The mike has blue plastic plates on both sides where your thumb and finger are going to hold it. That's to keep body heat from expanding the metal. So another advantage of the stand is you are not heating the mike at all.
There's probably some application where this stand might work better than the one above. This would be my second choice. All these stands to not hold the mike in a rigid manner, but instead allow it to tip about an axis. This one weights 2 lb 5 oz and is a little larger.
This stand would be handy for fitting into a tool chest or where small size is important. It folds flat when not in use. When the knob is tightened it not only clamps the mike but also snugs the rotation about the axle. Has a couple of coil springs to open the jaws.
These are hardened steel blocks with outside dimensions of
exactly 1 by 2 by 3 inches. These came as a set of
two. There are also 246 blocks that are twice as
big. The mike is reading 1.00000".
On the 2x3" face there are 5 tapped holes , the center and from center the 4 diagonals, like 5 on a pair of dice. The other 10 holes are 0.36" through.
|The five tapped holes are 3/8-16 and in
most the threads are continuous all the way through.
There are some web pages that mention a problem with the
threads in these holes, but mine are fine. It's not
clear to me how you can use the tapped holes to join two
blocks. Note the major diameter of a 3/8-16 bolt is
about 0.37" and so will not go through a 0.36" dia
hole. The thing to have would be some pieces of
round stock about 1/2" long and a little under 0.36"
diameter with a hole drilled and tapped at the center of
the length at 90 decreed to the center line for ¼-20
thread. This would allow using ¼-20 bolts and
washeers to make a 90 degree combined 123 fixture that was
Note on the left side of the micrometer frame just below the mike barbell there is a blue plastic cap. When the cap is removed there are 4 contacts on a printed circuit board for some external readout.
If you know what cable and connector work here let me know.
When trying to figure out a way to measure the flywheel from a Toy Engine using a pair of 123 blocks sure made it easy. The digital calipers are making a deepth measurement from the top of the boss to the back plane of the flywheel. Other measurements can be made to the plane of the 3 bumps in a similar fashion.
I can see you really do want two blocks.
|The dial gauge is used to make relative
measurements. The plunger is spring loaded so the
stand needs to be setup so that the plunger is below all
the heights that are going to be measured when it's
bottomed. By lifting the plunger from the top,
moving the part underneath and lowering the plunger down
on the part, one height can be compared to
another. The stand shown is a magnetic type with a
switch to lock it down or allow it to be moved.
This would be handy on a machine tool. There are
also stands that are just heavy for use on granite flat
|For example to see how much slop there is between a clock pivot shaft and it's bearing. In this case there's no need to zero the dial, just watch how much it moves as up or down force is applied to the shaft.|
The common household tape measure. 16 and 25 foot are common lengths.
It's hard to see in the photo, but the width of the tape is embossed just below the bottom of the belt clip, on this one it's 3 1/4". The thumb switch locks the tape. The end hook can move relative to the tape by the thickness of the metal it's made of. This way the tape measures correctly when it's either butted or hooked.
This 50 foot tape is similar to the 25' tape except for a tape this long a hand crank is needed to get it back inside instead of the spring used for shorter tapes.
|This measuring wheel has
a circumference of 1 foot. The left three Veeder type count
wheels read feet 000 to 999. The right wheel is
calibrated 0 to 11 inches.
The handle collapses to 14" and extends to 32". Good for hard surfaces. The bicycle wheel type is better for dirt. There really is no upper limit on the distance since the wheels just roll over 999 to 000 feet.
|Bushnell Yardage Pro 400
Distance Measuring optics. Your eye looks through
the single rear eyepiece and out through the small
center lens. Superimposed on the view the mode of
operation and a circle target along with the 3 digit
range in yards to the target are displayed.
The two large lens in front are probably silicon (black color), one for the IR transmitter and the other for the receiver.
5623335 Laser range finder with target quality display, 356/5.01 ; 356/139.08; 356/141.1
Used to measure the diameter of wire or the thickness of sheet metal.
Fig 1 Thickness in Gage
Fig 2 Note the distance between the flats corresponds to the label.
|An easy way to measure the TPI is with a thread gauge. By holding the gauge to the thread with a light background you can be certain of the pitch. Sometimes at first glance a thread appears to match, but when you rock the gauge the section that matches moves back and forth that indicates the thread is slightly different for the gauge pitch. Instead of the gauge you can also use a screw. So it's very handy to have a small collection of screws and nuts in the more common sizes handy for use a measurement tools.|
|This is a metic thread
pitch gauge with 28 leafs.
|Another way to measure the pitch is to use a flat bed scanner. When the imaging format is Bit Map (.bmp) the image contains scale information. That's not the case for Tagged Image Format (.tif) or Joint Picture Group (.jpg) files like used in a camera where scale has no meaning. The pitch of the 4-40 brass screw shown in the photo can easily be measured by using the ruler tool in a photo processing software package like Photoshop. The screw is from a Veeder Counter.|
Got these for optical alignment of a laser. The idea is by clamping the V Block to a table top and rotating the laser while watching the spot on a wall some distance away you can confirm that the laser beam is on the mechanical axis of a cylinder.
Enco SKU: 994-06493019
Consists of 2ea 1-5/8 x 1-3/4" V-blocks and 2 each clamps
PS They are on a paper towel for the photo rather than get grease on the light table.
|Looking at a digital scales (note capacity
and resolution differences vs. price):
AWS HX-502 Precision Digital Bench Scale Table Top 500g x 0.01g Bowl AC Adapter - $69
Large with counting bin & no data modes
Tree HRB-103 Milligram Lab Balance High Precision Scale 100g x 0.001g - $230
Medium size with glass box, 12V adapter & RS-232, b ut no cal weight
AWS ZEO-50 Milligram Powder Measure Reloading Scale 50g x 0.001g AC Adapter - $70
Small with small plastic cover, 50g cal weight & no data output
The 16 ounce postal scale will get you close enough for most things that light. Although there's a way to get replacement scales with the current USPS first class rates, it's easier to just make your own monetary scale. Although this one is one generation back.
The Harbor Freight 93543 is a 17+ ounce digital scale that reads to 0.01 ounces. It can be used for both mail and weight counting.
The Stamps.com free scale has a 5 pound capacity. Runs from an internal 9 volt battery or an external wall wart power supply. There's a trap door on the back that may be for selective assembly of another version with a data output connector. That would be handy for PC postage applications.
|This Salter Brecknell PS
400 two part scale consists of the platform and the
head. 400 pound capacity in 1/2 pound steps.
The platform has a DB-9 connector that's the RS-232 data
output port. A neat thing about this scale is that
you can weigh objects that can not be placed on a platform
of it's size (aprox 1' x 1'). This is done by
someone standing on the scale and then pressing the tare
button to zero the scale. Now when the object is
picked up only the object weight is displayed. Another
neat thing is with the remote head you can put a box on
the platform that's much larger than the platform and see
what it weighs on the head unit. If the same box was
placed on bathroom scales the display would be covered up.
It can also weigh people. Some stores sell these as a set of 4 for weighing racing Go Carts.
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