A tool used in engineering design, specifically in mechanical engineering, determines acceptable dimensional variations when creating a connection between two parts where one is intentionally designed to be slightly larger than the receiving feature of the other. This difference in size creates a pressure or force holding the two parts together. For example, this is used when a shaft is pressed into a hub; the shaft is slightly larger than the hole in the hub, resulting in a secure connection.
The importance of this calculation lies in ensuring the joint’s structural integrity and performance. Proper selection of dimensional variations prevents assembly failures such as excessive stress leading to premature failure or insufficient holding force resulting in slippage. Historically, these calculations were performed manually using complex formulas, requiring considerable time and expertise. Automated tools enhance accuracy and efficiency in this process.
