The Shars mics are calibrated in tenths, not thousandths. Cost is very reasonable for what they are and especially when compared to the Swiss or Japanese mics. The Shars mics each come with a set of anvils that can be used to measure both Imperial and Metric pitch diameters no need for metric mics like other makes require. All that I have seen come in sizes like other mics do - 0-1", 1-2", etc. Shars and others sell them for a price that is a fraction of a Tesa or Mitutoyo or even a Fowler set. The wires are also more accurate if you use them with a vernier mic-the thread mics only have 0.001" resolution and no vernier.Īs stated, the most economical option is a Chinese thread mic. I trust the numbers from thread wires a bit more than the mics. The old frame has the same width all the way around the "U".įWIW, thread mics are a bit difficult to use. The new ones have a notch to allow using the mic in close quarters. ![]() ![]() You can tell the difference by looking at the end of the frame with the fixed anvil. IIRC I spent around $35–$75 on each mic, maybe $200–$250 total. Note that the older model may not be accurate on all unified threads: the unified standard calls for a slightly larger minor diameter than the old American standard, and the ranges for the newer ones cover fewer threads in each size than the old ones. ![]() I have most of a set of Starretts, assembled over time by watching eBay. Not as expensive as a Mitutoyo or a set of Staretts, but not cheap, especially if you need both 0-50mm and 50-100mm. I believe Shars has an import thread mic with interchangeable anvils.
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