Unboxing: Mitutoyo Square Angles; Starrett Thread Comparator Micrometer

[@Reach41]

BS939 Grade B is the British standard that Mitutoyo is referring to.

[@LoydPrecisionMakers]

Oh wow thank you that is a great piece of information. That actually makes alot of sense.

[@mikeglodowski810]

HI LOYD I WAS SURPRISED BY YOUR MIC FIND SO MUCH SO I CHECKED MY STARETT CATALOG OUT. IT APPEARS THE 210 HAS 60 DEGREE POINTS & CAN BEUSED FOR THREAD CHECKING ---------- BUT--------NOT FOR PITCH DIAMETERS THEY HAVE A 575/5--???? FOR THAT THESE ARE THE ONES WITH THE VEE ANVILS WITH THIS HOBBY YOU LEARN STUFF ALL THE TIME MIKE

[@LoydPrecisionMakers]

Thanks for the information and the model numbers. I like how you looked them up got the scoop. I am going to have to see if I can find a copy of a Starrett catalog on vintage machinery. I've enjoyed this alot. I agree, every time learn something else.

[@prayer2671]

Source: ChatGPT (AI) Grade A: This is the highest standard and refers to tools that have the finest accuracy specifications. Grade A instruments are often used in settings where extremely precise measurements are critical, such as in quality control and high-precision engineering. These tools generally have tighter tolerances and are calibrated to the highest standards. Grade B: These tools are still highly accurate but have slightly looser tolerances compared to grade A. They are suitable for general industrial use where the precision requirements are less stringent than those needed in high-precision engineering but still require reliable and accurate measurement.

[@LoydPrecisionMakers]

Gotcha thanks.

[@mikeglodowski810]

HI LOYD I CONTACTED STARETT DIRECT & THEY SENT ME THE LATEST CATALOG #33 FOR VINTAGE ONES YOU MIGHT HAVE GET THEM THRU EBAY TYPE DEALS MIKE