[Helix22]

I have 2 power feed units. One says "MAX TORQUE 650 IN-LB" the other says "TORQUE 135 LB/IN". It would seem that the 650 In-Lb one is more powerful but I dont know if In-Lb is the same as Lb/In. Which power feed unit is more powerful? Thank you.

[keebler303]

Though incorrect, they both refer to the same unit. A lb-in (or in-lb) is the torque generated by a force of 1 lb at a distance of 1" from the center of the shaft. So 650 in-lb could be generated by 1 lb on the end of a 650 in long bar, or a 65 lb force on a 10" bar or any other combination. You multiply inches times pounds. That is why pounds per inch does not have any meaning as far as torque is concerned.


Matt

[Helix22]

I am surprised that 2 different brands have such a big difference. I am thinking of making one into a knee feed so obviously want to use the most powerful of the two. Thank you.

[keebler303]

I think they make one just for knees. I'd think it would take some doing to adapt a table feed to the knee.

Matt