Cam phaser between cam bearings

A variable camshaft timing assembly comprising:

• a hub including a center aperture and one or more vanes extending radially-outwardly away from a center axis;
• an elongated camshaft sleeve, configured to be received at least partially by an inner cavity of a camshaft, having a substantially annular outer surface including a distal bearing section, an end bearing section, and a hub section:
• the distal bearing section configured to be positioned radially-inwardly from and concentric with a distal bearing of the camshaft and to provide support to the distal bearing;
• the end bearing section, axially spaced from the distal bearing section, configured to be positioned radially-inwardly from and concentric with an end bearing of the camshaft, and to provide support to the end bearing;
• the hub section, located axially between the distal bearing section and the end bearing section, configured to engage the hub to prevent axial displacement between the hub and the elongated camshaft sleeve;
• and
• a camshaft sprocket, coaxial with the center axis, that includes an end bearing surface and engages with a distal end of the elongated camshaft sleeve.

A variable camshaft timing assembly comprising:

• a hub including a center aperture and one or more vanes extending radially-outwardly away from a center axis;
• an elongated camshaft sleeve, configured to be received at least partially by an inner cavity of a camshaft, having a substantially annular outer surface including a distal bearing section, an end bearing section, and a hub section:
• the distal bearing section configured to be positioned radially-inwardly from and concentric with a distal bearing of the camshaft and to provide support to the distal bearing;
• the end bearing section, axially spaced from the distal bearing section, configured to be positioned radially-inwardly from and concentric with an end bearing of the camshaft and to provide support to the end bearing;
• the hub section located axially between the distal bearing section and the end bearing section inside of the center aperture of the hub;
• a camshaft sprocket that is coaxial with the center axis and engages with a distal end of the elongated camshaft sleeve;
• and
• a retention device received by the camshaft sleeve to axially constrain the hub and camshaft sprocket relative to the camshaft sleeve, wherein the camshaft sleeve, the hub, and the camshaft sprocket resist angular displacement relative to each other.