and then assembling them, and pressing them onto the rotunda column, which we would also machine,” Archer said. “Now, they do the assembly.” State Brass has been able to ex-
pand its centrifugal casting business in the wake of the vertical machine addition. Because of its larger size compared to the horizontal machine, the company finds it is only limited on the parts it can produce by its pouring
capacity, which is about 2 tons. “Now, I believe we do some of the
heaviest wall thicknesses on the West Coast,” Archer said. And as long as the company continues
to produce those large centrifugal pieces at a high level of quality, customers like JBT give it reason to believe it can grow that side of the business even more. “State Brass has been a really good vendor for us,” said JBT mechanical
engineer Chris Hansen. “We’ve had other vendors of other components that [produce] parts with porosity, and we have to reject them. But to my knowledge, we’ve never had any issues with this bearing from State Brass.”
MC For More Information
“Centrifugal Casting,” N. Janco, American Foundry Society Publications, 2007.
JBT Aerotech’s passenger boarding bridges require the two large brass castings to support the column at its center joint. The upper piece af- fixes to the end of the column, the lower piece can be seen at the center of the column.
MODERN CASTING / October 2010 33
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