The utility model relates to a concentrated quick -witted running roller, this concentrated quick -witted running roller include wheel hub, take turns cover, retaining ring and two lock nut, wheel cover suit is on hub outer ring, hub outer ring is equipped with the male cone (strobilus masculinus), wheel cover inner circle is equipped with the interior conical surface, the male cone (strobilus masculinus) closely cooperates with the interior conical surface, the part that hub outer ring surpasss round cover is equipped with the external screw thread, two lock nut's internal thread respectivelywith wheel hub's matching the external screw, just two lock nut lock each other, the retaining ring sets up between round cover and two lock nut, the diameter of the male cone (strobilus masculinus)and the interior conical surface to the direction of retaining ring is reduced. The utility model discloses a concentrated quick -witted running roller has easy to maintain and maintenance, saves costof maintenance, reduces the advantage of maintaining intensity of labour, improvement maintenance efficiency, simple structure and easy equipment.