Measuring BHN

[drinks]

I have a Lee hardness tester, even with a stand I have some trouble getting a good measurement with the little microscope.
I recently bought a small digital microscope to check some water samples.
On reading the instructions I learned it has a measuring capacity, very easy to use, the image shows on the monitor, not in the very small microscope, a real problem for my old eyes, now with a cataract to make it worse.
The precision is likely as good as we would ever need, it is .001mm.
The microscope is a Celestron 44302A, Amazon has them.

[buyobuyo]

Neat looking microscope. I have some difficulty reading the Lee scope at times but can usually get a good reading after while. I may have to throw that on the xmas wishlist.

[GP100man]

Necessity is the mother of invention , no patents apply !!



http://i746.photobucket.com/albums/xx110/GP100man/Leescopeholder-1.jpg

[williamwaco]

Neat looking microscope. I have some difficulty reading the Lee scope at times but can usually get a good reading after while. I may have to throw that on the xmas wishlist.


I can't read it either. I use a magnifyer and my dial caliper.

At first I checked the readings with the microscope and they aere always the same so I just retired the Lee microscope.

[williamwaco]

On reading the instructions I learned it has a measuring capacity, very easy to use, the image shows on the monitor, not in the very small microscope, a real problem for my old eyes, now with a cataract to make it worse.
The precision is likely as good as we would ever need, it is .001mm.
The microscope is a Celestron 44302A, Amazon has them.

I have had one of these for a year now. I find the "measurements" to be largely imaginary. The measurement reported bears no relation to the size of the item being measured. I bought it for a camera and am very happy with it for that use but It would really be nice if I could measure with it.

How do you use it?

[mpmarty]

I use the LEE and can read it OK but have to remember to psyche myself out that I'm moving the boolit not the scope. Otherwise everything is backwards.

[W.R.Buchanan]

GP100; That is the best soultion to the lee microscope I have seen yet. I have a desk magnifier that is similar in concept but store bought. Simple, easy to make, and lets enough light in to be able to read the scale easily. I'm impressed.

On the other end of the scale I use this, but only because I can. the digital readout in .00001 increments so I can get really close to actual BNH.

If I didnt have that tool, I'd be making one like your's.

Very well done!

Randy

[buyobuyo]

Necessity is the mother of invention , no patents apply !!



http://i746.photobucket.com/albums/xx110/GP100man/Leescopeholder-1.jpg

I made myself one of those awhile ago. It helps, but my main problem is just focusing on the scale to read it. I usually look right past it and my eye focuses on the indentation.

[idahoron]

This one will help you guys that are having a tough time seeing the Lee. It is the cabine tree
Ron


http://i223.photobucket.com/albums/dd294/idahoron/Cabbintreetester1.jpg

[Sonnypie]

GP 100man...
You do realize that your bottle is a skoach over 4 years beyond its stale date, don't you? :shock:

Great idea!
Mine needs just a little elevation to read properly for my eyes.

[Gussy]

This one will help you guys that are having a tough time seeing the Lee. It is the cabine tree
Ron


http://i223.photobucket.com/albums/dd294/idahoron/Cabbintreetester1.jpg


That tester is OLD.....One of the first CT made!! Hex ends, brass lock screw on top.

[gnoahhh]

I have an old LBT tester that works well. I am lucky to have access to a hardness tester in a machine shop which I use from time to time to check/verify its accuracy. So far it stays within 1 bhn of the "big" machine, which is close enough for government work.

[6.5 mike]

+ a bunch for Gussey & cabintree.

[mdi]

I too had a bit of trouble using the Lee microscope so I got a magnifying visor (I believe it's 3X magnification). Under strong light I can use my dial calipers to "frame" the indention and get real close to, or closer than the 'scope. I thought I was doing it wrong because at first, all my testing showed a BHN of 12 to 13 on all my samples. Seems I was testing a lot of wheel weigh alloy that was about the same hardness, so I tried some linotype and got a much harder result (BHN about 22 - 23).

[largecaliberman]

Necessity is the mother of invention , no patents apply !!



http://i746.photobucket.com/albums/xx110/GP100man/Leescopeholder-1.jpg

Now this is what I call creative!!!!