 Roller bearings are essential components in machines that require rotation or sliding motion. They help reduce friction between moving parts, allowing them to operate more efficiently. Modern roller bearings have improved significantly over time thanks to advances in technology, including heat treatment processes. Heat treatment is a crucial step in producing these bearings, requiring careful consideration of their mechanical properties, cost efficiency, and dimensional accuracy. To address this challenge, simulation software has been developed to accurately predict the outcome of heat treatments. Using this Weisweld software from ESI Group, researchers were able to simulate the heat treatment process and measure its effectiveness. The results showed that the simulated heat treatment had similar effects to those observed in reality, providing valuable insight into the process. This article was authored by Peter Fabian, Peter Jankczyk, and Martina Kisilova.