The OZ Lifting hand chain hoist with hook mount has factory-set overload protection for added safety and to help prevent damage; steel construction for strength; a powder-coated body and components for resistance to wear; and a hand wheel that feeds the hand chain into the wheel sprocket from any angle to enable operation of hand chain from side, above, or below the load. This hoist has a low pulling force requirement to help facilitate use. When there is no load on the load hook, the free wheel clutch on this hoist allows the operator to disengage the gears for rapid chain adjustment. The OZ Lifting hand chain hoist has an enclosed, machined lift wheel for smooth operation. This hoist has an enclosed Weston-style friction disk brake and enclosed gears, a covered chain guide and chain cleaner, zinc-plated load chain, and sealed bearings for resistance to debris and wear. Identification tags are made of stainless steel for resistance to corrosion, are riveted to the hoist for secure attachment, and have etched labels for added legibility and resistance to wear. The gears and shafts in the OZ Lifting hand chain hoist run on roller bearings for smooth operation, added control, and maintenance-free lubrication. The mount hook and load hook on this hoist are made of forged alloy steel, have cast steel safety latches, and open slowly to indicate overload. Safety latches on the hooks are attached by a bolt and lock nut to facilitate rapid latch replacement in the field. The load hook also swivels to facilitate rotation of the load and minimize twisting of the load chain. This hoist has been load tested and certified by the manufacturer to 150% of rated capacity. The OZ Lifting hand chain hoist is produced to comply with American National Standards Institute/American Society for Mechanical Engineers (ANSI/ASME) B30.16 standard and Australian Standards (AS) 1418.2.
Hoists are devices that use relatively small amounts of force to lift, lower, and pull heavy loads. Manual hoists transfer a small, hand-exerted force either across a series of gears to multiply the force into one large enough to lift the designated load, or over a pulley, drum, or sheave to leverage the force into one strong enough to lift the load. This makes it possible for an operator to manage heavy loads. The manual force is usually applied using a hand chain, lever, or lever ratchet, lifting the load by a hook attached to a chain, rope, or wire. Hand chain and lever hoists generally use mechanical disk brakes called Weston-style brakes that hold the load in place while the operator's hands are released to make the next pull, secure the load once it has been lifted, and control the descent of the load as it is lowered. Ratchet puller hoists commonly use ratchets instead of mechanical brakes to secure and control the load. Manual hoists are commonly attached to or suspended from structures by hook or trolley mounts, and are used in the transportation, construction, manufacturing, mining, and material handling industries, among others.
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. Pull force describes the amount of force that needs to be applied to lift a load. If a 1/2 ton manual hoist specifies a pull force of 40 lbs., for example, the operator needs to be able to pull a 40 lb. weight in order to lift the maximum 1/2 ton (500 lb.) 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. Lift is the maximum vertical distance the load hook can move a load.
OZ Lifting Products manufactures hoists, beam clamps, and trolleys. The company, founded in 2004, is based in Winona, MN.