You can buy these with a calibration certificate for like $70, but I skipped the cert. Should be the same quality, cost me $16. I chose the version with the superior units of measurement.
this post was submitted on 05 Sep 2025
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Now you can check your bin of cheapo tapes and chuck the ones that are off.
Also, you need to get a micro-point pencil for marking cuts, or a laser if you can afford it. That blob of graphite you've been using ain't gonna cut it anymore.
He needs a CMM now to go with his gucci tape measure.
Coordinate-measuring machine
Its a machine that uses a very small probe to measure things with precision
I used to work in the alignments department at an aerospace company and we used something called a laser tracker made by Faro. It could measure down to ten-thousandths (0.0001) of an inch in X, Y, and Z up to 60 feet away. It's able to measure how much a 3 foot thick concrete floor flexes due to the gravitational pull of the moon.
Thats some crazy shit!!
A marking knife! When I bought one it changed my woodworking, I'm only off a little now.
Yeah... I use 0.9mm lead in my drafting pencil. I tried 0.3mm once but it breaks if you breathe on it too hard.
I've never been impressed with laser alignment of tools; red laser diodes tend to put out a line that to my eyes looks about 1/8" wide.
My miter saw tries to be clever and cheap about it and has a white LED positioned behind the blade so that it casts the blade's shadow on the work. Kinda wish they hadn't tried that because, with a miter saw, I can just lower the blade onto the work, line it up with the mark on my work, and then cut. Feels like putting holographic sights on an axe.