b"Captive Reel Winches: 6 - 70T Captive winches are offered with pulling loads up to 70 tons with both hydraulic and electric drives for boats from 18 m (60') to the largest megayachts. Drum lengths vary to fit individual project requirements. Captives and tensioners are tested at full load before shipping. The winch frame and drum are 6061-T6 hardcoat-anodized aluminum with a carbon-fiber gear cover to reduce weight. All parts connected to hydraulic or electrical circuitry are positioned on the same side for maintenance. The screw bearings and gear transmission are also located on this side for easy inspection. Bearings are sealed and lubricated with grease. The main gearbox is sealed and lubricated with oil. Hydraulic versions have an open-Electric Versions ended design to reduce weight.6T winches and larger run off 500-800V DC systems or 400V AC 3-phase supply. Electric motors on winches 9T and higher are customized for the application. The winch has a single gear and is managed with a joystick for trimming and easing. A gear-and-chain transmission drives the feeder screw, allowing the line to lie smoothly on the drum in a single layer. Tapping into the larger battery banks on modern yachts allows the use of electric captives in sizes previously only available in hydraulic. This provides a quieter, more efficient system. Harken has also developed an innovative push/pull captive that allows a single winch and motor to take the place of two.Hydraulic VersionsHydraulic winches 6T and up are offered with variable-speed motors. Custom solutions are available for higher loads. The synchronized transmission uses two gear sets (four gears) to drive the twin feeder screws. To change line diameter, the gear sets must be replaced. The feeder transmissions twin feederDesigned for easy maintenance.screws balance the load on the feeder, allowing line to lie smoothly on the drumeven when slack. The double screw design positions the screws close to the drum, reducing winch size over similarly configured winches. The tensioner system keeps a constant load on the line to prevent overrides.Self-lubricating feeder screw and sheave allow line to lie smoothly on the drum, even when slack.Two inner magnetic switches factory-set at the feeders stroke limits prevent overtravel. Two outer fail-safe limit switches automatically engage the brake.ELECTRICHYDRAULICProduct not stocked. Contact Harken to request quote and lead time.224"