Not to heat Rolling Bearings more than 110 deg C during mounting with induction heaters

 We are told not to heat Rolling Bearings more than 110 deg C during mounting with induction heaters, what is the reason for it ?

The recommended maximum temperature of 110 degrees Celsius during the mounting of rolling bearings with induction heaters is primarily to prevent potential damage to the bearings. Exceeding this temperature can lead to several undesirable effects:

1. Excessive expansion: When bearings are heated beyond their recommended temperature, they can undergo excessive expansion. This expansion may cause the bearing components, such as the inner and outer rings, rolling elements, and cage, to deform. Distortion or deformation of the bearing components can negatively impact their fit, alignment, and overall performance.
2. Thermal stress: Heating bearings beyond the recommended temperature can result in significant thermal stress. Rapid or uneven heating can create temperature gradients within the bearing, leading to thermal stress and potential cracking or failure of the bearing components. Excessive thermal stress can weaken the structural integrity of the bearing, compromising its load-carrying capacity and overall reliability.
3. Loss of hardness: High temperatures can cause a reduction in the hardness of bearing components, particularly the raceways and rolling elements. Bearing components are typically hardened to provide durability and resistance to wear. If the hardness of these components decreases due to excessive heating, the bearing's ability to withstand loads and maintain its integrity will be compromised.

By adhering to the recommended maximum temperature of 110 degrees Celsius, you can minimize the risks associated with excessive heating and ensure the proper installation and performance of rolling bearings. It is essential to follow the manufacturer's guidelines and instructions when using induction heaters or other heating methods for bearing mounting to avoid potential damage.