"Maximum torque
148Nm / 4000 rpm (109.165 lb/ ft)"
On 2005 Mar 22 , at 3:34 PM, Philip S Hall wrote:
... lb is not a unit of force. Why the / ? Can anyone enlighten me?
Yes, the pound IS a unit of force. (It is also a unit of mass which is why there is often so much Olde English confusion).
The slash (/) in the torque unit "lb/ft" for a torque unit is an ERROR. The torque unit in Olde English units is lb-ft (pounds TIMES feet) not lb/ft (pounds DIVIDED BY feet). It is a not too uncommon an error to confuse a combination of two units multiplied with two units divided. Hence people use the slash (which means divide) when the units are supposed to be multiplied.
Regards,
Bill Hooper
Fernandina Beach, Florida, USA
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SIMPLIFICATION begins with SI
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