I think even in USA, the metric bolts are starting to get more common than Standard bolts. Worlwide, metric bolts are the norm, USA is only country in the world not using metric.
On equipment without engines like a plow or soemthing like that, having standard is OK because there is no metric bolts.
But as soon as you have a recent tractor or combine, some newer equipments are a nightmare, because they have both metric and standard bolts. For instance, 20 years old combines had metric engines, metric hydraulic components and some purchased component, but standard bolts for the frame: A nightmare
Personally, I like to have one or the other, but not both. The Deere 9R were last to switch to full metric, but I think they are now.
Standard system is complete disaster to do math and calculation and some of the people I talked to had no idea of what they were doing because of it:
Exercice:
In non metric world:
I run a combine with a 30F header at 6MPH, yield average 100Bu/ac, grain bin 400Bu, how many passes can I go before I dump on a quarter section? how many acres/hours.
Someone please post the impossible to do on top of your head math.
Same in metric:
I run a combine with a 9m header at 8km/h, yield average 7t/ha, grain bin 10T, how many passes can I go before I dump on a 800m long field? How many ha/hr?
Answers in metric:
ha / hours = 9mx 8km/hr x 1000m/km / 10000m2/ha
ha / hours = 9mx 8km/hr / 10 = 7.2Ha/hr
Distance to fill:
10t/grain bin /7t/ha= about 1.4ha in a grain bin
1.4hax10000m2/ha /9m = about 1550m to get a grain bin full, so almost able to do 1 full turn in a 800m long field.
Someone please post the impossible to do on top of your head math, required in the standard system.
This post was edited by fdt860 on 11/07/2021 at 03:22 am.
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