Disclosed is a miniature high-speed bearing specifically for use in a dental handpiece, comprising a bearing, wherein a bearing sleeve (1) is provided outside the bearing, the bearing sleeve (1) comprises a choke portion (2) covering an upper end face of the bearing, and a via hole corresponding to a hole on the bearing is provided in a middle part of the choke portion (2) a connecting part (4) closely fitting on a side face of the bearing and an extension part (3) which is folded outwardly and is used for fixing on a machine head of the dental handpiece. The present invention uses the bearing sleeve (1) to form a flange bearing, and the bearing sleeve (1) is simple in structure and can directly be made by pressing, and has a good fixing effect and operating effect. The bearing sleeve has a good sealing effect, without obvious spillover phenomenon of a greasing substance during use, and the bearing sleeve can mitigate heat expansion and cold contraction of the bearing during the operating process, so that the bearing can operate stably within the dental handpiece, and on the other hand, the wall thickness of the bearing is increased, and the double-layered structure can have silencing and damping effects, thereby significantly improving the usage effect and safety and degree of sanitation of the dental handpiece.La présente invention décrit un palier miniature haute vitesse spécifiquement destiné à une utilisation dans une pièce à main dentaire, comprenant un palier, où un manchon de palier (1) est prévu à lextérieur du palier, le manchon de palier (1) comprenant une partie détranglement (2) recouvrant une face dextrémité supérieure du palier, et un trou traversant correspondant à un trou sur le palier étant prévu dans une partie médiane de la partie détranglement (2) une partie de connexion (4) sajustant étroitement sur une face latérale du palier et une partie dextension (3) qui est pliée vers lextérieur et est utilisée pour la fixation sur une tête de machine d
