The result of your conversion between RPM and ton-force [long] appears here
To convert between RPM and Ton-force [long] you have to do the following:
First divide 1/60 / 4.4482216*2240 = 0.00000167
Then multiply the amount of RPM you want to convert to Ton-force [long], use the chart below to guide you.
Symbol: rpm
No description
Symbol: tonf
No description