The portable induction heater is intended for use in maintenance tasks to heat up bearings that are placed onto a shaft in an interference fit. The versatility of the heaters application also allows it to be used to heat other metallic, ring-shaped components. The device contains an easy-to-use LED control panel that doesn't need any specific training to utilize. A portable Induction Heater aids in lowering internal stresses that are brought on by the inner ring's excessive thermal expansion when compared to the outer ring.