>So I guess Britain went metric sometime after '72 and before '84.
When I started in the drawing office in the UK in 1964, my first job was
metrication of drawings for a new range of electric motors. Changing the
thread standard from Whitworth to metric. In 1968 I moved to the
aircraft industry and went back to the inch series (unified) then in 1979
I moved to the automotive industry and changed back to metric, then in
1994 I moved to the US and changed to inch equivalents of metric
dimensions, since all the big US car companies have been metric for a
while, unlike many other US industries.
The metric system was introduced in the UK over a long period of time,
and is still not universal. Some industries were metric in the mid
sixties, the auto industry was slow to catch on.
The rear mainshaft bearing on a LR box has been metric since the
fifties, the front layshaft bearing was changed to metric around 1964,
even though Whitworth threads were still in use.
Regards
Bill Leacock
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