You should mention that inexpensive general shop use measuring Jo blocks are meant for the machinist/toolmaker on the job. Also in that same shop, there are the more expensive inspection tool room Jo-blocks, always kept in a clean controlled environment for final verification and Quality Control.
One advantage of steel blocks for in shop use is their similar thermal coefficient to steel and cast means they self correct for a cold or hot shop when machining those materials.
Thank you for taking the time to do this videos, are really helpful. I’m a tool designer student from Mexico and a truly passionate of tool making. All my respect for you!
Thanks for this really high class lesson. Having a master degree in electronics measuring, calibrating, certification etc all is well known. Traceability etc. Dealing with really sensitive electronical thermometers they start changing within seconds due to the heat radiation from the human body. All instruments lie as well as gauge blocks. They can still be used if it's known how much they are off. Well done Don! I could imagine You as being the head of the measurement division in any university, in any company.
Just for fun, the next video could be going over the grades of the blocks and their pricing. Mitutoyo and Starrett sets when you get into ceramic lab grade the prices open your eyes at retail.
Good to see you both still doing your thing. I thought you might have said something about using different grades of Jo blocks in workshop, QA and Laboritory. But always a joy watching a new Surburban video.
What ever you need to messure, always use a tool that can do one magnitude more than what is needed to read. Is it 0.01...get something that can read 0.001. Your life in the kitchen, woodshop and at the milling machine will be so much easier.
