Patent ID: 8049992

Claim:
A tape reel comprising: a hub on which is wound a recording tape on which is recorded a servo signal that is a reference for tracking by a recording/playback head of a drive device, a thickness of the recording tape is less than or equal to 7.5 μm and one end of the hub is open; and a first flange provided integrally at one end portion of the hub, a second flange provided integrally at the other end portion of the hub, wherein a diameter of a substantially central portion of the hub is formed larger than diameters of each of the end portions of the hub, the first flange and the second flange are configured to deform so as to narrow the flange interval according to deformation of the hub as the recording tape is wound onto the hub, a clearance obtained by subtracting a width of the recording tape from the flange interval at an outer peripheral surface of the hub is greater than or equal to 0.10 mm and less than or equal to 0.18 mm, and a ratio of a difference between a larger radius of radii of both end portions of the hub and a radius of the substantially central portion of the hub, with respect to a width of the recording tape is greater than or equal to 0.00055 and less than or equal to 0.0063.