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Interesting info

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Phil Tibbetts

02-09-2020 17:38:20

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Don't know if this will be helpful to anybody but every once in a while somebody asks me to convert MM or Cm to inches for them. An easy rule to remember is 25 mm is very close to 1 inch. So if you have something that is 50 mm it is just under 2 inches. If it is listed as cm 2 1/2 cm is the same thing as 25 mm A cm is 10 times as much as a mm. I worked as a machinist for over 40 years and at the last of it we were making parts both in metric and inches (thank you world trade) so this came in handy for rough work. We even had machines that were graduated in both metric and inches. I found that after working with metrics for a while I actually preferred it to inches. All metric is based on 10. So easy to convert up or down. Hope this helps someone.

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Tom Massachusetts

02-10-2020 05:49:21

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 Re: Interesting info in reply to Phil Tibbetts, 02-09-2020 17:38:20  
Also 13mm is close to 1/2", 17mm is close to 11/16", 19mm is close to 3/4" they are close enough to use wrenches both ways

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Phil Tibbetts

02-10-2020 20:51:28

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 Re: Interesting info in reply to Tom Massachusetts, 02-10-2020 05:49:21  
And 16mm and 5/8 interchange. Never could see why they leave out 18mm in most socket sets and wrench sets but always put in 19mm when it is almost perfect match to 3/4. Another of life's mysteries.

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02-10-2020 07:05:20

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 Re: Interesting info in reply to Tom Massachusetts, 02-10-2020 05:49:21  
double sets of sockets and wrenches is easier. :)

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