How much axial shaft movement in a motor?

Axial shaft movement in a motor, often referred to as axial play or end float, typically ranges from 0.1 to 0.5 mm (0.004 to 0.020 inches) for most electric motors. This movement is necessary to accommodate thermal expansion and mechanical tolerances. However, excessive axial movement can lead to misalignment and increased wear, so it's important to monitor and maintain it within the manufacturer's specified limits.