View single post by Pete Moulds
 Posted: Sat Aug 1st, 2020 05:05 pm
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Pete Moulds

Joined: Sat Feb 25th, 2006
Location: Bumi Serpong Damai, Jakarta, Indonesia
Frank, yes I believe they do primarily use ratchets in 1/4", 3/8" and 1/2". This is because they were invented in the USA.These are 'legacy products' and this, I guess, is inevitable. 
I have US, German, Japanese and British sockets sets all of which have drive sizes in fractions of inches. When I buy sockets at home here in Indonesia they are in standard drive sizes and I know they will fit my ratchets in the workshop.
Never have seen any metric ratchet drives sizes, even in France and Russia.

The western world has been a leader in certain technologies for many years and I am not arguing to overturn these customs just for the purposes of eradicating old imperial measurements when they have become standards.
I am anxious to make this point which I am glad you brought up.

In aviation internationally,  English is the official language of air traffic control as I understand and talk of flight levels generally in thousands of feet I believe.

Metrication shouldn't be seen as a defeat in some kind of competition. The metric system has clear advantages over the imperial system is many aspects. Simplicity, logical units, ease of use, ease of up-scaling and linkage between properties being measured and these advantages have led to it becoming global in use.

In a world of global products it makes sense to use the system when it is appropriate; especially if you want to sell your produce for export.

In the UK, we decided that it was uneconomical to change all road sign speed limits to kph so we stick with miles. That's OK but now we build cars in metric units.
Believe me I know about all standard component sizes or legacy dimensions and the problem they present.

The international oil production business has been living now for decades with such a dual system. Many components are in inches historically yet lengths and depths are in metres. It is possible to mix them provided you clearly mark each unit and remain aware of the differences.