Specifications
21 
Southwestern Industries, Inc. 
TRAK LPM Programming, Safety, & Operating Manual 
3.3.3 Maximum Spindle Torque and Horsepower 
The following graphs illustrate the continuous and peak torque vs. RPM and horsepower 
vs. RPM for the LPM machine at the spindle. Peak torque and horsepower values can 
only be attained for a short period of time before the spindle drive will fault out to protect 
the motor. 
0
10
20
30
40
50
60
0 2000 4000 6000 8000
Torque (ft-lbs) 
RPM 
Torque vs RPM 
Continuous Torque
Peak Torque
0
2
4
6
8
10
12
14
16
0 2000 4000 6000 8000
HP 
RPM 
HP vs RPM 
Continuous HP
Peak HP










