Field reports from suppliers describe an evolving marketplace.
"We sell mostly three-cone bits -- lots of TCI bits for overburden and that sort of thing," Dinn reports. "Hammers account for maybe 10 percent of our business." As for the bits, he says, "We sell 5:1 used/rebuilt vs. new, and I expect that to continue for the foreseeable future." While the company offers the entire range up to 36 inches, the most popular size bit that moves through Tee Jay is 7 7?