# H7 Housing Bores and When k5 or m6 Belongs on the Shaft

Rotating inner rings usually need a firm shaft fit. Stationary outer rings often sit in H7 with room to float axially. Switch those rules when the outer ring rotates with a hub or wheel.

Field crews still mix up layout rules when drawings are thin. Cross-check the notes from shaft housing tolerances before the next change-out. Tefule Bearing collects the practical checks in one place for maintenance and design review.

Keep tflbearing.com bookmarked with the shaft drawing. Shandong TFL Bearing Co., Ltd publishes application notes so teams share the same language on fits, clearance, and locating ends.