Our most advanced knee mill designed for 3-axis work


  • 3-axis CNC, 3-axis DRO
  • Precision 7207 P4 spindle bearings
  • Chrome ground quill
  • Meehanite® castings
  • Slide ways are Turcite® coated
  • Standard glass scale for quill Z readout
  • Precision ground ballscrews installed in the table and saddle
  • Wide way surfaces are hardened and ground
  • Real handwheels for working manually
  • ProtoTRAK Control model –SMX 
  • Table Size-50" X 10"
  • Table Travel -32"
  • Saddle Travel-15.5"
  • Knee Travel:-16"
  • Ram Travel-24"
  • Maximum Quill Travel, machine-5"
  • Maximum Quill Travel, CNC – 4.25”
  • Quill Diameter-3 3/8"
  • Spindle Taper-R8
  • Spindle Speed Range -60-4200 RPM
  • Head Tilt-45° forward and back, 90° left and right
  • Spindle Motor- 3 HP
  • Power Requirement Control-110V; 1P; 10A
  • Power Requirements Machine -220/440V; 3P; 8.5/4.25A
  • Maximum Weight on Table - 750 lbs
  • Machine Weight - 2816 lbs
  • Machine dims (l x w x h) - 71" x 59" x 84"
  • Maximum rapid feed-100 IPM
  • Way surface type - Dovetail X, Z; Square Y
  • Precision 7207 CP4 Spindle bearings
  • Chrome hardened and ground quill
  • Meehanite castings
  • Slide ways are Turcite® coated
  • Wide way surfaces are hardened and ground

The ProtoTRAK SMX is a powerful CNC for milling machines that lets
you choose the capability that is right for you.


  • Advanced Capability
  • Easy Transition between manual, 2-axis and 3-axis CNC.
  • Always easy to learn and use - even for the most advanced operations


See More....

  • Remote Stop/Go Switch
  • Power drawbar
  • Halogen work lamp
  • Chip pan
  • Knee power feed
  • Coolant pump
  • Table guard
  • Vise
  • USB memory stick
  • Auto lube pump
  • Spray coolant
  • Auxiliary functions
  • Advanced Features with Verify (CNC option)
  • DXF File Converter (CNC option)
  • Parasolid Converter (CNC option)
  • Networking (CNC option)


Manual Name Part Number Version Size
The Parasolid Converter Operating Manual 28070 092812 561 KB Download PDF
ProtoTRAK SMX K2, K3, K4 & Retrofit Safety, Installation, Maintenance, Service & Parts List Manual 24319 060911 6.5 MB Download PDF
TRAK SX Knee Mill & ProtoTRAK SMX CNC Retrofit Safety, Programming, Operating, & Care Manual 24493 032015 4.91 MB Download PDF


Title Filename Version Size
ProtoTRAK SMX / SLX Verify Software Option 1.05 3.2 MB Download
ProtoTRAK DXF Converter Option Version 3.2 for SMX, SLX 2.76 MB Download
ProtoTRAK SMX/SLX Control 5.11 1.4 MB Download
ProtoTRAK OFFLINE PT4SXOL sxol_511.exe 5.11 (SMX & SLX Controls) 23.1 MB Download
Service & Support
Service Dept


7:00 AM to 4:30 PM PST

Parts Support Policy
  • SWI supports all its products for as long as the components are reasonably available.
  • Many electronic components are eligible for exchange. See the service price list.
  • All exchanges and repairs must have an RMA number issued by the SWI Service Department.
  • An evaluation fee of $75 is applied to units sent in for repair. If repair is not authorized, this fee is still charged (even if the unit is exchanged).
  • Both repaired and exchange units have a warranty of 90 days.

Visit to purchase accessories and service parts for your model.

Express Exchange Policy
  • The Express Exchange is an exchange of a failed component for a (usually) rebuilt component that has previously failed and has been repaired, brought up to current revision and subjected to the rigorous testing and QC applied to new units.
  • The Express Exchange provides for the exchange part to be shipped to you before you send in the failed part.
  • The price of the exchange part is a fraction of the cost of a new unit.
  • This low price assumes that the failed part will be returned to us so that we can salvage the parts for future exchange units.
  • There will be no credits issued when you send back the failed part. The credit is built into the price of the exchange.
  • If you do not send the failed part back to us we will send you another invoice for the difference between the Exchange Price and List Price on the part we didn’t receive.