Precision Bearing System Tolerance
Calculator – Thermal Effects
Precision Bearing System Tolerance Calculator - Thermal Effects
The below precision bearing system tolerance calculator is created to support engineers during the design of a product that may see a large thermal range. The top section is based off of installation temperatures and ABEC / DIN / ISO standards. The lower section applies the temperature input and shows an engineer how the materials will attempt to grow / shrink. Note that this information is provided within the free state of the materials. There will be some variation from the below due to resistance between the materials; this should be under consideration.
For standard applications where more accurate specifications are not known, the ambient temperature of the room where the spindle is used can be utilized for the Housing temperature and an additional 10°C increase can be used as the Shaft temperature. This 10°C rise in shaft temperature will generally make up for increased running temperatures. High n*dm applications and high load applications may have a higher temperature delta between the shaft and housing.
Every application may have specifics that need to be taken into account to adjust a standard system tolerance strategy to thermal or other unique parameters. Please contact GMN Bearing USA Ltd engineers for technical support and questions.
Note: There is also a Precision Bearing System Tolerance Calculator – Standards and RPM to support engineers in applications with less severe temperature conditions.