A durable transfer roll core may comprise an elongate body comprising a groove, the elongate body having a longitudinal axis. The groove may comprise a Groove Angle from about 0 to about 90 degrees (relative to the longitudinal axis) and the groove may comprise a Groove Depth greater than about 0.003 inches.

A durable transfer roll core may comprise an elongate body comprising a groove, the elongate body having an elongate body longitudinal axis. First and second ridges may be on each side of the groove and may be asymmetrical relative to the groove longitudinal axis.

A method for winding a cable (12) onto a cable reel (22) includes providing a cable reel (22) having a drum (24) arranged between two end flanges (28, 30). The drum (24) has a longitudinal axis (26), and the cable is placed (12) on the drum (24) to form a plurality of continuous helical windings (32) on the drum (24). Consecutive windings (32) are directly adjacent to each other, where main bending axes (34) of the continuous helical windings (32) and the longitudinal axis (26) of the drum (24) enclose an offset angle () greater than zero.

Single layer wrapped helically grooved drum sheaves with non-invariant groove helical angle are disclosed which have zero fleet angle over their entire extent, calculable for any application. These drums can be paired with pulleys rotating parallel to the drum axis, to give complete drum and pulley systems having zero fleet angle over their full range of motion. These drums can alternately be paired with non-rotating cable terminating attachments, to give complete drum and attachment systems having zero fleet angle over their full range of motion. For single layer wrapped drum and pulley cable systems as well as for single layer wrapped drum and attachment cable systems; the present invention enables complete elimination of the service lifespan reduction arising from non-zero fleet angles. Another implementation benefit is reduction in elevator mechanical compartment size using the zero fleet angle tradeoff between drum length and drum to pulley separation.