Newly developed multiple rotating ultrasonic probe type PRA 1433 with rotating connector for axle and crown inspection having the ability to accommodate up to 4 sensors (for disc Ø max 100 mm) or 6 sensors (for disc Ø greater than 100 mm) placed at different angles and at different frequencies. Rotationally placed sensors check the axle at different depths thus ensuring inspection of critical parts of the part. It is possible to display signals in B-Scan format using the multiple probe with encoder. Sensor gradations vary according to the characteristics of the axle and the areas to be inspected. We can make multiple rotating probes of any size suitable for any type of railway axle.