Pulley

A pulley comprising:

• a hollow body having a cylindrical outer surface that defines a rolling contact surface,
• a hollow cylinder support element rotatably supporting the hollow body about a rotational axis,
• an attachment element axially extending along a main central axis and being fixedly connectable with the support element, wherein an axial end of the attachment element and a facing axial end of the support element abut each other and have complementary dome-shaped surfaces configured such that the rotational axis of the hollow body is angularly adjustable relative to the main central axis of the attachment element within a range of inclination angles,
• a rod attached to the attachment element approximately in the middle of the dome-shaped axial end side of the attachment element and extending through a hollow cavity of the support element, wherein an opposite axial end of the support element is fixedly connectable to the rod at a selected inclination angle relative to the attachment element,
• wherein an opposite axial end of the support element also has a dome-shaped surface facing a complementary dome-shaped surface formed on one of a fixing means and an intervening element disposed between the fixing means and the support element and
• wherein one of the axial ends of the support element is concave and the other axial end of the support element is convex.

A pulley comprising:

• a hollow body having a cylindrical outer surface and a rotational axis,
• a hollow cylinder support element rotatably supporting the hollow body about the rotational axis and having first and second axial ends that are each dome-shaped,
• an attachment element having a central axis extending in an axial direction and a complementary dome-shaped axial end abutting the first dome-shaped axial end of the support element,
• a rod extending within a hollow interior of the support element and having a first axial end fixedly connectable with the complementary dome-shaped axial end of the attachment element,
• a fixing element connected to a second axial end of the rod and having a complementary dome-shaped axial end abutting the second dome-shaped axial end of the support element,
• wherein the rotational axis of the hollow body is angularly pivotable relative to the central axis of the attachment element at the fixing element, and
• wherein one of the first and second dome-shaped axial ends of the support element is concave and the other is convex.