Great Lakes Metal Treating was created to utilize today's new technologies. The Induction department hardening is no exception. Within this department there are four NATCO induction hardening machines; three horizontal and one vertical. There is also one Inductron II TOCCO induction hardener.

NATCO uses the Delapina method by submerging the gear teeth under the quench to allow an instant quench for maximum hardness and minimal distortion. NATCO has the range to perform from a 2 pitch to a 6 pitch gear, due to the ability to vary frequency from 150 KHz to 300 KHz with a power of 25 KW. Effective case depths of up to .250" with a hardness of 60 HRC can be achieved. TOCCO uses a 10 KHz frequency with an output current of 200 KW. This process can reach up to .375" in case depth with a hardness of 58 HRC.

Each machine is programmed to specifically meet the customer's request. Before an order is processed, a sample is run, then cut and analyzed to assure the required specifications are met.

We can harden gear teeth precisely to the depth required. We are the complete machine shop, this allows us to design and construct the fixtures and inductors to harden our customers' parts. All metallurgical analysis is performed in-house by our trained technicians.