High-precision long-cylinder type double-row angular contact ball bearing axial clearance detection device

The invention discloses a high-precision long-cylinder-type double-row angular contact ball bearing axial clearance detection device, and relates to the technical field of bearing detection. The invention relates to a clearance measuring instrument, and aims to solve the problems that the existing clearance measuring instrument abrades a bearing raceway and a rolling body when in use, and errors exist in detection numerical values due to translation and angular deviation between the axis of an inner ring and the axis of an outer ring when in measurement. According to the bearing clearance detection device, the inner rings of the bearing are fixed on the mandrel in a concentric shaft mode, the two inner rings are concentric through positioning of the inner diameter of the bearing, and the phenomena of translation and angular deviation of the axes of the inner rings and the axes of the outer rings in the measurement process are avoided, so that the measurement precision can be improved; and the screw rod is scr