page_title: Wire rope spooling technology
section_title: Screw level winder
hierarchical_section_title: Wire rope spooling technology / Screw level winder
caption_attribution_description: Deutsch: Seilwinde mit Kreuzgewindespindel English: winch drum with screw level winder
context_page_description: Wire rope spooling-Technology is the technology to prevent wire rope getting snagged when spooled especially in multiple layers on a drum.
context_section_description: Level winders can be hydraulically or electrically driven and computer controlled, or they can be simple mechanical devices. A mechanical level winder comprises a main shaft (the lead screw) with helical screw grooving along which the rope feeder travels. The rope feeder housing includes two vertical roller bars and one horizontal roller, or alternatively a wire rope sheave. The lateral movement of the housing is generated by a chain drive sprocket ratio between drum and lead screw, as shown in the image. The automatic level winder fitted is designed and engineered to be compatible with the grooving on the drum.
  Alternatively, a sheave can be integrated and installed within the housing frame. In this case, the system can be set up anywhere around the drum. 
  Oceanographic installations that spool rope up to 46 layers have demonstrated that level winders give synchronized and controlled spooling in the harshest, most testing conditions.
caption: Winch drum with screw level winder
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