WHEEL SUPPORTING METHOD OF CAR WHEEL LATHE, AND CAR WHEEL LATHE

PROBLEM TO BE SOLVED: To provide a wheel supporting method of a car wheel lathe capable of automatically supporting the center of a wheel without applying an unreasonable force to the wheel even when a wheel with different axle lengths and a wheel with a same axle length are mixed, and the car wheel lathe. SOLUTION: The wheel supporting method of the car wheel lathe comprises two main spindle blocks for rotatably supporting respective main spindles, a wheel supporting member for supporting the wheel from both sides, a driving means for the wheel supporting member for back and forth moving each wheel supporting member to each main spindle, and turns a pair of wheel pairs of the wheel. The wheel supporting method comprises a first procedure for determining whether lengths of an axle part between the end surface of the wheel parts of the wheel and both ends of the wheel axle are different from each other, and a second procedure for controlling starting, stopping, or moving speed of the driving means so that the wheel supporting member simultaneously or substantially simultaneously presses and supports both ends of the wheel axle when it is determined that there is a difference in the first procedure.