Specifications
23 
Southwestern Industries, Inc. 
TRAK LPM Programming, Safety, & Operating Manual 
3.3.9 Spindle Motor & Drive 
The spindle motor is 10 HP and drives the spindle via a timing belt. The ratio between 
the spindle and spindle motor is 1 to 1. The RPM range for this machine is 150 to 8000 
RPM. 
3.3.10 Automatic Draw Bar Assembly 
The automatic drawbar is an assembly consisting of an air cylinder and an actuator that 
unclamps the tool. Tooling is changed by means of the Automatic Tool Changer (ATC), 
or can be done manually by pressing and holding the “Unclamp” button. Tools are 
clamped when the button is released. A clamping force of approximately 1500 lbs is 
generated to clamp the toolholder to the spindle. The Automatic Draw Bar Assembly uses 
full system air and requires no adjustment. The air cylinder that does the clamping and 
unclamping is lubricated with a small cup. Make sure to check the oil level in this cup on 
a regular basis. 
3.3.11 Retention Knobs 
The LPM uses CAT40 retention knobs as shown below. Tightening to the proper torque 
value is important for all retention knobs. Please see the retention knob manufacturer for 
the proper torque. 
Retention knobs 
Warning! 
Retention knobs come in a wide variety of designs, however they often look 
similar and appear to be interchangeable, but they are not. Use only the knob 
that the LPM is designed to use. The use of the incorrect knob, or the incorrect 
use of a knob, may result in injury and/or damage to the mechanism. 










