Description: This precision-turned steel shaft and matching tapered sleeve assembly serve as the rotational core for the upper wheel. The bushing locks into the wheel hub to deliver balanced, zero-runout spinning at high operating speeds. Features: Microscopic Concentric Tolerances: Machined on precision lathes to guarantee true rotation with zero wheel wobble. 360-Degree Compression Lock: Split-taper bushing design applies uniform clamping…