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Tool Test probes (the mechanical type)

Tool
slow-poke

slow-poke

Ultra Member
To clarify when I say mechanical I mean a test probe for measuring an edge as opposed to say a Volt.

My previously posted question about coaxial indicators and some of the responses makes me think a test probe might be a more useful tool.

A quick google search resulted in threads ranging from the merits of a $9700 probe to the cheapest $100 AliExpress probe.

Well forget about the $9700 probes, if I purchase a test probe it's going to be a lot closer to the Ali end of the spectrum.

Question 1) Anyone using one of the $100 Ali type probes and if so how good/bad/ consistent are they?

Question 2) Purchase a new Ali type probe or a used better branded eBay special?

Question 3) How much should I expect to pay for a probe that will results to under 0.001" error?
 
Not a DTI, something more like this, better title "3D probe"?
18DCE4F2-F439-457B-BEB4-47952EBE73F8.jpeg
 
Susquatch said:
How about an electronic edge finder instead.....

Accusize Industrial Tools Electronic Short Shank Edge Finders with Sound Alert, C028-9273 : Amazon.ca: Industrial & Scientific

Accusize Industrial Tools Electronic Short Shank Edge Finders with Sound Alert, C028-9273 : Amazon.ca: Industrial & Scientific
a.co

They claim 2 tenths. I routinely get 1 tenth. But I'm sure other errors (spindle, holder, etc) stack up on it.
Click to expand...
Looks great.

What happens if you inadvertently bump too far?

Say you're 1 mil away, and you goof up and jog 10mils, does the tip break or is there some built in compliance for operator error?
 
slow-poke said:
Looks great.

What happens if you inadvertently bump too far?

Say you're 1 mil away, and you goof up and jog 10mils, does the tip break or is there some built in compliance for operator error?
Click to expand...

No problem. The ball has a spring loaded attachment to the stem. Works great.

What is a mil? Or did you mean mill? (jk)
 
Susquatch said:
No problem. The ball has a spring loaded attachment to the stem. Works great.

What is a mil? Or did you mean mill? (jk)
Click to expand...
Commonly used term when laying out PCBs or referring to component size, I assumed (I guess incorrectly) that "mil" was also used when referring to small dimensions in the machine world.

4 mil track width, 4 mil spacing is for dense circuits.

EE05F931-8322-4899-85F6-7907DFF5F4FA.jpeg
 
slow-poke said:
Commonly used term when laying out PCBs or referring to component size
Click to expand...

I'm truly sorry to make you explain all that. I had hoped the "jk" would tip you off. But ya, not many use the term in machining. A thou is much more common. Dentists seem to like it though......

What really tics me off is when it gets used instead of mm.
 
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