Circular knife grinder with Periphery Grind for Super Finish

The AC400, AC520, and AC800 grinding machines are suitable to resharpen circular knives and counter-knives both in HSS and carbide. You can resharpen knives by means of a cup grinding wheel or a tangential grinding wheel.

Product Details


Dual purpose CNC Slitter Grinder. Ideal for shops looking to offer Super Finish periphery grind common on tissue + paper knives

    • 3Hp (6Hp option) Twin Spindle Grinding head allows for use of Cup wheel for high production or Periphery wheel for superior finish
    • Automatically grind a wide variety of circular knives including HSS, Stainless or Carbide, top & bottom slitters, single & multiple bevels, counter knives, tissue knives
    • Touchscreen CNC Controller programmable for roughing, finishing, and sparkout cycle with ability to save & recall programs
    • Match grind program allows grinding of multiple knives to the same diameter.
    • Variable knife rotation speed up to 200 RPM
  • Variable Grinding wheel speed
  • Automatic central lubrication system
  • 2-axis CNC stepper motors with ballscrew drive and monorail slides for increased accuracy & durability


  • UT.MA AC400 CNC (for knives up to 15″)
  • UT.MA AC520 CNC (for knives up to 20″)
  • UT.MA AC800 CNC (for knives up to 31″)

Features & Benefits

Parts, service, and support for your grinding machine.

We’re here to help in whatever way works best for you: on-site, over the phone, or remotely through Zoom, Teams, WhatsApp, or FaceTime.

Colonial Saw's support team is available 8:00 a.m.—8:00 p.m. EST.