Using a 25 mm diameter, a H9/d9 fit gives a minimum clearance of 0.065 mm and a max clearance of 0.169 mm. Close Running Fit Close-running fits are a good choice for applications that require smaller clearances and moderate accuracy. Good for withstanding medium speeds and pressures. Example...
The hole sizes for inch fasteners are patterned after USA common usage and the general clearances translated from the metric standard. The hole tolerances are based on the ISO System of Limits and Fits, as required by ISO 273. Clearance Holes and Tolerances for Metric Size Fasteners per. ASME...
Running and Sliding Fits (RC): Running and sliding fits, are intended to provide a similar running performance, with suitable lubrication allowance, throughout the range of sizes. The clearances for the first two classes, used chiefly as slide fits, increase more slowly with the diameter than f...