Roller mill

A roller mill, comprising:

• a machine frame having a plurality of frame parts interconnected to each other at mated faces thereof;
• a first and a second roller unit disposed in said machine frame;
• a first pair of bearing jewels disposed in said first roller unit;
• a first grinding roller rotatably mounted in said first pair of bearing jewels;
• a second pair of bearing jewels disposed in said second roller unit;
• a second grinding roller rotatably mounted in said second pair of bearing jewels and disposed mutually opposite said first grinding roller;
• a drive unit operatively coupled to each of said first and second grinding rollers and configured to counter-rotatingly drive said grinding rollers;
• and
• a force application system coupled between said machine frame and at least one of said first and second roller units and configured to generate a grinding force to be transmitted via said machine frame and said bearing jewels to said grinding rollers;
• two mutually compressed connection faces defined at an interconnection between mated faces of at least one of,
• (a) at least two interconnected frame parts, or
• (b) at least one frame part and one of said bearing jewels of said first and second pair of bearing jewels;
• and
• a coating disposed on at least one of said two mutually compressed connection faces that is configured to generate a releasable micro positive lock there between for transmitting grinding force.