Clearance
pcThe intentional gap between two interacting parts or components.
expanded
Clearance is an integral aspect of mechanical design, ensuring that two parts can move past each other without interference, while allowing for thermal expansion, material deformation, and any manufacturing tolerances. It's crucial in applications such as rotating shafts, where adequate clearance prevents friction that could lead to wear or failure.
examples
In the design of a journal bearing, the clearance between the shaft and the bearing is maintained at 0.025 mm (0.000984 in) to ensure smooth rotation and proper lubrication.
Commonly used in automotive engines and heavy machinery to prevent friction and wear on rotating components.
A clearance of 1.5 mm (0.059 in) is maintained between a piston and cylinder wall in large-scale domestic air conditioning units to accommodate thermal expansion during operation.
Essential in HVAC systems to prevent component contact leading to potential failure and efficiency loss.