To improve metallurgical structure and to relieve internal stresses, Penn Machine carefully heat treats products according to specification. Penn Machine has extensive and diversified heat treating equipment that handles parts up to 72" diameter and up to 6,000 lbs. Modern electric and gas-fired atmosphere furnaces are controlled by oxygen probes to ensure accurate carbon content and case depth in carburized parts. By performing all heat treating within our facilities, we control the production process from start to finish to ensure total quality and delivery.