Roller crusher and method for arrangement thereof

A roller crusher having two parallel rollers arranged to rotate in opposite directions, towards each other, and separated by a gap that is adjustable by movement of the two rollers toward and away from each other, each roller having two ends, the roller crusher comprising:

• a flange attached to at least one of the ends of one of the rollers,
• the flange extending in a radial direction of the roller,
• the flange having a height (H) above an outer surface of the roller, and
• a movement blocking arrangement structured and arranged to limit the gap between the rollers to a minimum gap of at least 45 mm,
• wherein the roller crusher further comprises at least one scraper positioned at an end of the roller with the flange, and wherein the scraper is positioned such that a minimum roller surface distance between each scraping surface of the at least one scraper and the outer surface of the roller is within the range of 70% to 100% of the minimum gap, such that, when the roller crusher is in operation, the at least one scraper is allowed to partially wear down and thereby reduce in size at a magnitude being up to 30% of the minimum gap, thereby extending an individual wear life the at least one scraper.