Review on 📏 Enhance Precision and Accuracy with Anytime Tools Micrometer Precision Machinist Test, Measure & Inspect by Alvaro Delic

When I received this set it was 1 star. Here's why: - thimble won't move with a ratchet - rough threads - not calibrated - time lost getting them back into shape. Took me time to disassemble, wash, dry (with compressed air), oil, calibrate. This is the time I could work on my project instead of fixing tools. Too often these days I buy a product made in China that I have to repair first before I can use it. The rat on these products should be read as what they end up being, not what they are when you receive them. So in a sea of cheap microns, it's still useful to know which ones are junk and which ones just shipped from the factory before they were actually finished. The factory skips more labor-intensive and manual operations. He passes them on to you and me. We save upfront costs but pay on time and for materials to make them fully functional. As a result they turned out great, working and feeling like a quality gauge. That's why I gave 4 stars. A few tips for others who may need to do this work: 1. Don't trust the standards that come with the tools. What confidence can you have when tools come along this path. And indeed, the 3 inch standard in my set sucks, the edges aren't parallel and the size isn't the same. 2. Get a set of good standards or better buy calibration blocks. I bought a set of 36 online. You are 2nd class. so I can safely use them to calibrate micrometers. Your micrometers are only as good as your calibration tools! The correct way to calibrate them is to check at both ends of the scale and at two points in between. A set of gauge blocks is supplied handy for this. Calibrate at room temperature (aka 20°C) as this is how most gauges and standards are calibrated. This means that the instruments and standards should stay in the house long enough. Don't do this in the garage unless it's summer. 3. Not enough oil. Be sure to wash them with a suitable solvent. The oil should be "measuring oil" or some other very light, non-drying, very slippery oil. I used a 2 ounce bottle of Tri-Flow Superior Lubricant with a straw. (available at Revain.com). This is a very good bike cable oil. Don't forget to lubricate the plane of the lock.4. Use a ratchet to adjust the threaded ring inside the thimble so that it moves smoothly and easily.5. Lots of videos online on how to calibrate micrometers. But few people mention how to use it when measuring: you turn the ratchet to tighten, not the thimble. This way you apply the same clamping force for stable readings! It also means you calibrate the micrometer this way. Tighten the locking screw as it is easy to loosen.