The Dubois S-Series Differential Roll Coater provides a precise application of coating to flat substrate in a newly upgraded machine which is sized as a direct replacement for many competitors machines. The differential roll coater uses a rubber application roller to apply coating directly to a part passing through the machine; the durometer of these rolls is selected based on the finish being applied. The coating thickness is varied by the doctor roll pressing against the applicator roll which uses variable speed and direction capabilities to apply coatings with precise control of film thickness. The air loaded doctor roll assembly combined with Dubois’ unique pivoted roll arrangement allows for easy changeover of materials. To see our 2020 virtual roll coater, visit

Key features:

  • Variable speed chrome plated doctor roll
  • Air loaded floating applicator roll allows for adjustment of down pressure
  • Air loaded doctor roll
  • Quick change doctor blades
  • Digital readouts for precise control
  • Air actuated head lift to automatically raise head when conveyor stops


  • Variable speed rubber covered applicator roll
  • Variable speed conveyor drive
  • Automatic head height adjustment
  • Overlap protection
  • Ceramic doctor roll covering
  • Tungsten Carbide doctor roll covering
  • Doctor roll heating and cooling
  • Explosion proof wiring

Primary uses:

  • Stain
  • Seal
  • Base Coat
  • Top Coat

Solidly constructed for long term reliability, Dubois equipment is engineered with innovations to improve productivity and minimize clean-up, maintenance and downtime. It’s manufactured in the U.S., to assure fast response and prompt availability of replacement parts from local suppliers. Contact Dubois Equipment today to discuss your roll coating needs.