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What is the H7/h6 fit clearance?

1 Answers

LaEverly

07/29/25 9:41pm

H7/h6 is a basic hole system fit clearance. H7/h6 is the tolerance fit code for mechanical components in the industry. H7 refers to the tolerance zone code of the hole to be matched, while h6 represents the tolerance zone code of the outer surface of the bearing (if the bearing is matched with the hole, then the bearing acts as the shaft). Below is more information about the clearance: 1. Function: The clearance serves to store lubricating oil, compensate for various errors, etc. Its size affects the relative motion between the hole and the shaft. 2. Main application: Clearance fits are primarily used for movable connections between holes and shafts, such as the connection between sliding bearings and shafts. The fit tolerance refers to the sum of the tolerance zones of the shaft and hole that form the fit, representing the allowable variation in clearance or interference. Its magnitude indicates the range of variation in the tightness of the fit and is an important comprehensive indicator for evaluating the quality of the fit.

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