Specifications

Southwestern Industries, Inc.
ProtoTRAK SMX K2, K3, K4 & Retrofit Safety, Installation, Maintenance, Service & Parts List Manual
25
2.12 Air Connection - Optional
The K mill machines have an air hookup in the rear of the machine if the machine has a power
drawbar or auxiliary function option. Auxiliary function options are only found on 3 axis mills.
If the machine has a power drawbar option then the machine will include an air regulator, air
manifold and an oiler. The air fitting is ¼” NPT. Within the manifold there is an additional air
line port in case the user wants to hook up an air line to clean chips. Remove the plug to gain
access to this port. If the machine has an auxiliary function option then the machine will include
an air solenoid as shown below.
The air regulator is set to 90 psi at the factory for the power drawbar unit and solenoid. See
Section 5 for more information on the power drawbar unit. The air comes in through the
manifold, and then into the air regulator that tees off into an oiler for the power drawbar unit
and into an air solenoid. The solenoid is used for a misting system the user may install later on
this machine. There is a ¼” quick disconnect air fitting on the solenoid where the mister air
hose can be plugged into. See the figure below for an illustration.