A client contacted THE LAB at Ambrell needing to heat a steel band to 1000 ºF (538 ºC) and insert a carbon graphite ring into the center of the steel band. THE LAB determined that an Ambrell EKOHEAT® 10 kW, 50-150 kHz induction heating system with a four turn, two-over-two helical coil would be optimal for this induction shrink fitting application. The frequency for this application was 132 kHz.