Drag rollers for escalators, moving walkways, and other conveyors

A drag roller comprising:

• a drag roller body configured to roll along a rail;
• a roller spindle coupled to the drag roller body and configured to be coupled to a body of a step or a pallet, wherein a bearing journal of the roller spindle has a conical form;
• a bushing disposed on the bearing journal of the roller spindle having the conical form, the bushing configured to contact the body of the step or the pallet;
• and
• a blocking body configured to secure the body of the step or the pallet to the roller spindle, wherein the blocking body is oriented perpendicularly to the roller spindle and extends at least through an opening in the body of the step or the pallet.

A drag roller comprising:

• a drag roller body configured to roll along a rail;
• a roller spindle coupled to the drag roller body and configured to be coupled to a body of a step or a pallet, wherein a portion of the roller spindle has a conical form;
• and
• a clamping element that forms a frictionally engaging connection between the roller spindle and the body of the step or the pallet, the clamping element being disposed on the portion of the roller spindle having the conical form, wherein an outer diameter of the clamping element increases linearly with proximity to the drag roller body.