The Harrington ED single speed electric chain hoist has a single phase motor for 120-volt outlets, a die-cast aluminum body with low headroom for tight workspaces and mobility, and a hook for overhead mounting. This hoist has a dual-brake system with a Weston-style mechanical load brake and an electric regenerative brake, which generates electricity to help power the motor. This hoist has a standard pendant (three feet off lift) and push-button cord for easy operation from a standing position. Separate up and down momentary contact buttons on the control box provide added safety and control. An upper limit switch helps prevent over winding and over lifting. This hoist includes a small direct current (DC) motor rectifier that converts alternating current (AC) to DC to reduce weight, generate less heat, and help maximize duty ratings (maximum run time and number of starts the hoist can perform in a given time period). The Harrington ED single speed electric chain hoist is typically used to lift and move loads for industrial or commercial applications, but also may be used in residential workshops. This hoist complies with American National Standards Institute/National Fire Protection Association (ANSI/NFPA) 70, National Electrical Code. When used according to manufacturer’s recommendations, this product is covered by a one-year warranty from date of shipment against defects in workmanship or materials.
Hoists are devices that use relatively small amounts of force to lift, lower, and move heavy loads. They work by transferring a small force generated by a motor across a series of gears that concentrate it into a force large enough to lift the designated load. Their lifting mechanisms consist of a motor; drive shaft; gear set; wheel threaded with a load chain or wire; and a lifting hook. The motor turns the drive shaft, which engages the gears; the gears interact to rotate the wheel and load chain or wire, which pulls the hook up to lift the load. When the force generated by the motor reaches the smaller sprocket wheel, it has become concentrated enough to lift the load. Hoists are operated with a control box, or pendant, that descends from the hoist. A standard pendant is three feet shorter than the lift, placing it at a comfortable chest level for an operator of average height. Hoists can be attached to structures such as cranes, ceilings, and walls by a variety of methods including hook, trolley, deck, base, wall, and ceiling mounts. They are used in a variety of industries such as transportation, construction, manufacturing, mining, plumbing, foundry, and materials handling.
Load capacity is the maximum rated load a hoist can handle. While manufacturers may indicate they have tested a hoist beyond its limits, operators should never attempt to lift a load heavier than the maximum rated load. Lifting speed describes, in feet per minute (fpm), how quickly the hoist can lift the maximum rated load. Lift is the maximum vertical distance the load hook can move a load. Headroom is the distance from the bottom of the load hook to the top of the hoist. This is the minimum amount of vertical space needed for the hoist to hang freely and operate correctly. Duty ratings describe the maximum amount of time a hoist can run and the number of times it can start over a given time period under various conditions such as intermittent use, or short and lengthy periods of operation.
Harrington Hoists manufactures hoists and cranes. The company, founded in 1854 and headquartered in Manheim, PA, meets International Organization for Standardization (ISO) standard 9001.