Lead is a soft, bluish-gray metal with a metallic luster when fractured. It has a density of 11.35 g/cm³ and a melting point of 327.4°C, with a boiling point of 1525°C. Pure lead is one of the softest metals, with a Mohs hardness of only 1.5. While it is highly malleable, its ductility is very low, making it unsuitable for applications requiring tensile strength. Lead is also a poor conductor of both heat and electricity—its thermal conductivity is about 7.5% that of silver, and its electrical conductivity is just 7.77% of silver’s.
In terms of chemical stability, lead is relatively inert under normal conditions. It does not react with dry air at room temperature. However, it dissolves easily in dilute nitric acid but remains insoluble in sulfuric or hydrochloric acid at room temperature. When exposed to these acids, a protective layer of PbClâ‚‚ or PbSOâ‚„ forms on the surface, preventing further corrosion. Lead is also unreactive with alkalis, ammonia, chlorine solutions, and most organic acids and esters.
Due to its resistance to corrosion by acids and alkalis, lead has a wide range of industrial applications. It is commonly used in the production of chemical equipment, electrolyzers in metallurgical plants, cable sheaths, and storage batteries. Lead-based alloys are used in bearings, soldering materials, ceramics, glass, rubber, and petroleum refining. Additionally, lead's ability to absorb radiation makes it valuable in the X-ray and nuclear industries. It is also used in printing alloys and other specialized applications.
Lead is found in more than 700 locations across China, with major deposits in Heilongjiang, Liaoning, Hebei, Inner Mongolia, Gansu, Shaanxi, Qinghai, Hunan, Guangdong, Zhejiang, Jiangxi, Jiangsu, Guangxi, Yunnan, and Sichuan. Notable sites include Xilin, Hongtunshan, Caijiayingzi, Baiyinuo, Leadium Mountain, Shuikoushan, Fankou, and many others.
There are 42 known lead minerals in China, with 11 of them having industrial significance. In lead-zinc deposits, various associated minerals such as copper, tungsten, tin, molybdenum, tantalum, arsenic, mercury, cobalt, nickel, gold, silver, platinum, rare elements, pyrite, fluorite, celestite, and barite are often present. These should be considered for recycling to maximize resource efficiency. Additionally, oilfield waters in the U.S. may contain significant amounts of lead and zinc, which can be recovered for reuse.
Shaft Collars are common pieces of hardware used for holding bearings and sprockets to shafts, situate components in motor and gearbox assemblies, and serve as mechanical stops. Shaft collars can be found in virtually any type of machinery and are frequently accessories to other components. Shaft collars provide three primary functions: 1) holding components in place, 2) locating or positioning components on a shaft, and 3) creating an attachment between shaft and another component. Despite their simple design, shaft collars play an important role in a wide range of industrial applications.
Yokelink Shaft Collars come in both inch and metric sizes and are available in either Carbon steel or 304 Stainless Steel. Yokelink shaft collars includes set-screw collars as well as one-piece (single-split) and two-piece (double-split) collars with zinc plated or black oxide finish. Our shaft collars are available for most common sizes ranging from 3/16″ to 4″ and 5mm to 100mm. When you need Shaft Collars, refer to our catalog, we offer them in a full selection of sizes, provide the diameter or part number to get a quote on these shaft collars, leave your message, or send us an email. You can also call us to get answers to your questions and place your order.
