Fecha de publicación: 12/08/2022 Fuente: Wipo "precision agriculture" The utility model belongs to the technical field of bearings, particularly relates to a high-precision agricultural machinery bearing, and provides the following scheme aiming at the problems of poor dustproof effect and large friction force when the bearing is used: the high-precision agricultural machinery bearing comprises a bearing inner ring and a bearing outer ring, and two annular grooves which are symmetrically distributed are formed in the inner surface of the bearing inner ring; four retainers which are uniformly distributed are arranged on the inner wall of the annular groove; according to the utility model, the four retainers are encircled into a closed ring through the clamping grooves and the bulges in sequence, and are placed in the annular grooves under the action of the positioning convex strips, the retainers and the bearing inner ring are filled with a plurality of balls, and then the bearing outer ring and the bearing inner ring are sealed through the two sealing rings, so that the bearing outer ring and the bearing inner ring are sealed; the dustproof effect of the bearing inner ring and the bearing outer ring during use is effectively improved, at the moment, lubricating oil is injected into the annular oil injection grooves through the oil injection through grooves, and the lubricating effect of the balls is greatly improved through the action of the oil injection holes.