Fired up for safety: Safety, Standards & Compliance

A hand-held fire extinguisher is effective for putting out a small fire, such as a grease fire in a kitchen, but is overmatched when a CNC machine tool catches fire. The latter requires an industrial-strength solution to douse the flames in seconds and save the expensive piece of capital equipment.

John J. Koerner III learned that lesson after a carbide drill broke when machining a titanium screw on a Citizen A20 Swiss-style machine. The resulting spark ignited the oil-based coolant, which is applied at 138 bar (2,000 psi).

He is president of Elite Outfitting Solutions Inc. in Goshen, New York, a four-person machine shop that makes more than 100 everyday-carry products, such as metal wallets and knives, and performs contract machining at an approximate 557-sq.-m (6,000-sq.-ft.) facility.Although still relatively small, EOS has grown by leaps and bounds from its origins in 2011. While still in college, Koerner worked at Orange County Choppers in Newburgh, New York, the setting of the “American Chopper” reality television series. In addition to making motorcycle parts, such as “crazy wheels,” he started making his own line of CNC-machined wallets and selling them online. As demand grew, renting machine time at the shop didn’t enable him to produce as many wallets as needed, so he took out a loan for a Haas vertical machining center and struck out on his own in 2014.After buying a second Haas VMC, he needed a better way of producing the short titanium and stainless steel screws for the wallets rather than buying readily available longer screws and manually grinding them to length. He said other shops either passed on cutting the required-size screws or quoted an exorbitant rate. He sought another Haas machine, but the dealer said the machine builder doesn’t offer what is needed for that task and directed him to a distributor of CitizenSwiss-style machines. However, the purchase of a model A20 machine necessitated an additional investment.”They said, ‘If you are going to run titanium, you need to put a Firetrace on the machine because you are running straight oil,” Koerner said about the fire suppression system from Scottsdale, Arizona-based Firetrace International. “At the time, that was a lot of money for a fire extinguisher.”Firetrace International’s systems detect fires at their source, then automatically suppress them using specialized chemical agents. Image courtesy of Firetrace International

Nonetheless, he bought the system from Haight Fire Equipment Supply in Newburgh and said he’s thankful he did.

“You’d have to be out of your mind to not buy a Firetrace system if you have a machine that has oil coolant,” Koerner said, noting that applying water-based coolant in the Citizen risks poor tool life and rust issues. “I would never put myself at that risk.”

The fire suppression system was put to the test when he was alone at the shop and the Swiss machine was cutting a titanium screw with a 1.981 mm (0.078″) drill at 50,000 rpm. The drill broke, created a spark and set the machine on fire.

“It was a fireball,” Koerner said. “It blew the door wide open. It scared the hell out of me.”