A tracking apparatus (10; 110) for urging a mistracking conveyor belt back toward a correct travel path, the tracking apparatus (10; 110) comprising: an idler roller (18; 118) for engaging a surface of the conveyor belt , the idler roller (18; 118) having opposite end portions and a neutral position when the conveyor belt is traveling along the correct travel path; a central support shaft (20; 120) configured to operatively mount the idler roller (18; 118) to a conveyor structure with the central support shaft (20; 120) extending along a longitudinal axis transverse to the correct travel path of the conveyor belt ; a tilt coupling (30; 130) operably connected between the central support shaft (20; 120) and the idler roller (18; 118) with the tilt coupling (30; 130) disposed entirely within the idler roller (18; 118), the tilt coupling (30; 130) being configured to allow the idler roller (18; 118) to pivot with respect to the central support shaft (20; 120) when the conveyor belt is mistracking so that one of the end portions of the idler roller (18; 118) is further downstream from the neutral position thereof and further downstream than the other end portion of the idler roller (18; 118) for directing the conveyor belt back toward the correct travel path, and to allow the idler roller (18; 118) to use a reaction force from the conveyor belt as the conveyor belt is being directed by the pivoted idler roller (18; 118) to actuate the idler roller (18; 118) to be tilted so that the one end portion of the idler roller (18; 118) is shifted in a direction transverse to the surface of the conveyor belt so as to increase the force exerted by the idler roller end portion on the conveyor belt surface for urging the conveyor belt back toward the correct travel path; characterized in that the tilt coupling (30; 130) is configured for shifting of the idler roller (18; 118) along the longitudinal axis of the central support shaft (20; 120). an idler roller (18; 118) for engaging a surface of the conveyor belt , the idler roller (18; 118) having opposite end portions and a neutral position when the conveyor belt is traveling along the correct travel path; a central support shaft (20; 120) configured to operatively mount the idler roller (18; 118) to a conveyor structure with the central support shaft (20; 120) extending along a longitudinal axis transverse to the correct travel path of the conveyor belt ; a tilt coupling (30; 130) operably connected between the central support shaft (20; 120) and the idler roller (18; 118) with the tilt coupling (30; 130) disposed entirely within the idler roller (18; 118), the tilt coupling (30; 130) being configured to allow the idler roller (18; 118) to pivot with respect to the central support shaft (20; 120) when the conveyor belt is mistracking so that one of the end portions of the idler roller (18; 118) is further downstream from the neutral position thereof and further downstream than the other end portion of the idler roller (18; 118) for directing the conveyor belt back toward the correct travel path, and to allow the idler roller (18; 118) to use a reaction force from the conveyor belt as the conveyor belt is being directed by the pivoted idler roller (18; 118) to actuate the idler roller (18; 118) to be tilted so that the one end portion of the idler roller (18; 118) is shifted in a direction transverse to the surface of the conveyor belt so as to increase the force exerted by the idler roller end portion on the conveyor belt surface for urging the conveyor belt back toward the correct travel path; characterized in that the tilt coupling (30; 130) is configured for shifting of the idler roller (18; 118) along the longitudinal axis of the central support shaft (20; 120). <EOS>