Single carrier roller

The utility model relates to a single carrier roller in the technical field of carrier roller production, which comprises a roller shaft, two conical seats, a steel ball cover plate, a steel ball and a horizontal sleeve, the roller shaft is coaxially arranged in the horizontal sleeve in a penetrating manner, and the two conical seats are correspondingly sleeved at two ends of the horizontal sleeve. The outer conical surfaces of the two conical seats and the outer surface of the middle section of the horizontal sleeve jointly form a groove-shaped bearing surface of the conveying belt, a plurality of circles of ball pits are formed in the outer conical surfaces of the conical seats in the axial direction, the number of the ball pits in each circle of ball pits is sequentially decreased in the diameter decreasing direction of the conical seats, and a steel ball is arranged in each ball pit; the outer conical surface of the conical seat is sleeved with a steel ball cover plate, the steel ball cover plate is detac