This 34-in., 4-lb. counterweight is used for bal- ance in a helicopter rotor system. Lead is often used in counterweight applications, particu- larly in aerospace settings, due to its density.
frequency of testing must increase. Respirators can be used to make
Casting a lead alloy around brass creates this 20-lb. component for a diagnostic device used in the medical industry.
the production of lead products safer, but they are not considered a primary means of protection. Producers must fi rst focus on engineering and work practice controls before supplementing with respirators. “We have everything in place that
is required to ensure the health of workers,” Doyle said. “People think lead is the only thing they need to pay attention to, but you can [see negative health effects] from something as be- nign as tin. It’s just observing exposure limits, having the right equipment and knowing what you’re doing.” Whether you’re a producer or user
of lead products, medical surveillance is the key to limiting the health risks of living and working with lead, ac- cording to the International Lead As- sociation. In order to keep lead safe in the public domain, information must be disseminated to the public, and blood tests should be performed on individuals that have been exposed to potentially high levels of lead. “As far as making products out of
lead, people have been stopping it since the early 1990s. For many in- dustries, there are so many restrictions that they can’t get around it,” Doyle said. “But for industries like aviation, they get around it because lead is the only choice.”
METAL Online Resource
Visit
www.ila-lead.org for more information on lead alloys and their applications from the International Lead Association.
38 METAL CASTING DESIGN AND PURCHASING JULY/AUGUST 2011
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