ProtoTRAK Knee Mill Retrofits

Make your manual machines more productive

We have transformed thousands of Bridgeport® and similar knee-type milling machines from outdated manual machines to highly productive ProtoTRAK CNCs. With experience earned over 40 years, we know how to give you the best possible outcome.


  • 2-axis CNC retrofits
  • Powerful features for manual milling
  • Enhanced ProtoTRAK Assistance
  • Powerful solid model graphics
  • Powerful offline programming for using our Advanced Software Options
  • Easy, prompted programming events with graphics that update while you program


  • 2 or 3-axis CNC retrofits
  • Easy to learn and use
  • Improved Auto Geometry Engine®
  • Outstanding graphics
  • Powerful offline programming for using our Advanced Software Options
  • Can handle quick manual jobs to complex profiling
ProtoTRAK Knee Mill Retrofit Kit

The standard kit includes:

  • ProtoTRAK Display Assembly
  • Integrated E-stop
  • Computer module
  • Display mounting arm and hardware
  • Quill scale and bracket (2-axis kits)
  • Quill-drive ball screw, motor assembly and mounting plate (3-axis kits)
  • Ball screws to replace the table and saddle lead screws
  • Nut retaining yoke (if required by the machine type)
  • X and Y axis servo motors and amplifiers
  • Table end cap and motor mounting bracket
  • Saddle handwheel adapter and motor mounting bracket
  • Drive belts and pulleys (2 sets)
  • Angular contact bearings (2 sets)
  • Foldaway hand wheels (2 each)
  • All hardware required for installation
  • Clamps and cable ties

Custom and General Kits Are Available for the following brands of machines:

Note: Not all models may be retrofitted. Contact us for more information, or to arrange for a demo.

  • Acer
  • Acra Mill
  • Alliant
  • Astro
  • Atlas
  • Atrump
  • Besmer
  • Birmingham
  • Bridgeport
  • Chevalier
  • Classic
  • Clausing Atlas
  • Comet
  • Do-All
  • Enco
  • Euro-Mill
  • First
  • Hurco
  • Kalamazoo
  • Kent
  • Kingston
  • Kondia
  • Lagun
  • Marina
  • Merlin
  • Microcut
  • Millport
  • MSC
  • Pasma
  • Royal
  • Santec
  • Seiki
  • Sharp
  • Siber-Hegner/Santec
  • Southbend
  • Supermax (YCI)
  • Vectrax
  • Victor
  • Webb
  • Wells Index
  • Willis
  • Wilton

TRAK 3-Axis CNC Retrofit

Three-Axis CNC

Retrofits using the KMX CNC are available as three-axis CNCs, with a quill drive for Z-axis machining. The mill can be run manually, as a two-axis or three-axis CNC. Manual quill control is with our unique Electronic Handwheel.

Note: For most three-axis CNC applications, we highly recommend TRAK Bed Mills.

3-axis retrofits are not available with the RMX at this time.