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Traditionally, these weights have been made of lead; it is estimated that up to 500,000 pounds (230 t) of lead, having fallen off car wheels, ended up in the environment. [8] According to the US Environmental Protection Agency , worldwide these total more than 20,000 tonnes of lead annually, [ 9 ] and therefore the use of less-toxic materials ...
Electric melting pot charged with automobile wheel weights in preparation for bullet casting. A small amount of solder will be added after the steel clips and slag have been skimmed from the melt. Pure lead was used to cast hollow-base bullets for Civil War era muskets. These bullets were designed to load easily and then expand into the grooves ...
Even with good ventilation there will be lead oxide dust in the lead melting area. [31] Solid block weights can corrode and be damaged when dropped or impacting other weights. In flexible bag weights, the small pieces of lead shot will rub together when handled and used, releasing lead dust and corrosion products into the water. [32]
A deep drop weight is used to reach the bottom in deeper offshore fishing applications. These fishing weights are typically cylindrical in with a brass eyelet at the top for attaching to a rig. Weights for this style of sinker range from one pound to as much as fourteen pounds. Target species include tilefish, grouper, and swordfish, among ...
A Scandinavian steelyard is a variant which consists of a bar with a fixed weight attached to one end, a movable pivot point, and an attachment point for the object to be weighed at the other end. Once the object to be weighed is attached to its end of the bar, the pivot point, which is frequently a loop at the end of a cord or chain, is moved ...
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