ELECTION? ID RATHER GO NUTS...AND BOLTS MITUTOYO CALIPERS AND THREADS!!! EP65
An election to make?
I have something better. Mitutoyo calipers with the white dial, the D-12 TX. Its one pretty tool, made from stainless steel, with the brake, face adjustment.
Its all to measure the threads, and I go over how to do so in detail, be them metric or SAE. How do you measure the diameter, and how do you measure threads as closely as you can without a thread gauge. (Note, for metric threads I find it the least accurate way to measure threads as it WILL lead to errors…)
I also discuss one of the benefits of SAE, how it has an infinite number of fractions between each size. Metric also has an infinite but the numbers start getting longer. It’s a personal preference, but I thought of it interesting at the least.
Yes, I go into fractions…
Also the SAE system is much easier in counting threads. You simply count the number of threads in an inch. In metric, you must literally measure something that can be 1 millimeter, 1.25 or 1.5, and hope that there isnt any local damage or your hand is steady and so on. Its prone to errors.
So, threads, can be a pain to measure when you’re dealing with heavy corrosion, and scaling. So back to diameters, you want to measure across the face and hitting two threads on each side. Don’t squeeze so you don’t damage the thread and sink in with the calipers.
Also a good practice is to take multiple measurements, along multiple diameters, so spin the bolt and measure again and see if you get the same measurement.
This video is a great example of how you should pay attention! I made a mistake with the thread pitch. The bolt is metric and I measure it as such. Instead, count how many threads you have per cm, and divide by 10! (You can also measure by inch and divide by 25.4)
I got M22x1.0, which I corrected to M22x1.25…and at time of publishing I found to actually be a very rough and damaged M22x1.5!!!
One final point, make sure you store precision instruments in dry conditions, and room temperature as the calibration may be affected.
The rant I made though stands. While I thought I could find the more common M22 fittings, I was wrong. Unless you want powerwasher or sink parts…ie good little consumer stuff, then screw it (or not it seems!). When did we become so bad when it comes to not fixing anything at all?
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