Tolerance ring with high axial static friction

A tolerance ring, comprising:

• a substantial cylindrical base portion having a constant first radius along an axial length of the base portion;
• and
• a plurality of circumferentially spaced radially outwardly projecting contacting portions on the surface of the base portion, each contacting portion comprising:
• a central surface longitudinally extending parallel to an axis of the base portion with a first edge having a second radius greater than the first radius at a first longitudinal end of the central surface and a second edge having a third radius greater than the second radius at a second longitudinal end of the central surface, opposing circumferential edges of the central surface extending between the first and second edges,
• an angled circumferential transition surface extending along each circumferential edge of the central surface and extending circumferentially from the first radius of the base portion to the second and third radii of the first and second edges over a circumferential transition length, each circumferential transition surface decreasing in radius at a constant angle from the second edge to the first edge along the longitudinal length of the central surface,
• a first axial transition surface extending along the first edge of the central surface between the opposing circumferential transition surfaces and extending axially from the first radius of the base portion to the first edge of the central surface over a first axial transition length, and
• a second axial transition surface extending along the second edge of the central surface between the opposing circumferential transition surfaces and extending axially from the first radius of the base portion to the second edge of the central surface over a second axial transition length,
• wherein the central surface, the circumferential transition surfaces and the first and second axial transition surfaces adjoin one another to form an outer surface of the contacting portion.