IndyCar Engineer Shifts Gears to Manufacturing


With a handful of “recovering racers” at the wheel, a small manufacturing operation in Indianapolis says it’s on the doorstep of explosive growth. Most of 3rd Dimension LLC’s employees are IndyCar alumni—several engineers and a machinist—who now use their skills in the additive manufacturing sector, which President Bob Markley says is progressing at a pace that rivals racecars. The former trackside engineer says “I was the guy on the radio you see drivers talking to,” but he’s now calling the shots for his business team.

3rd Dimension’s expertise is in laser powder bed fusion; direct metal laser sintering (DMLS) is the industry term, but a layperson would describe it as 3-D printing.

“We start with a very fine powder as feedstock, and we put that powder down roughly one-third of the thickness of a human hair,” says Markley. “Then we use a high-power laser to…



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