b'standards. These are typically morethe connection to minimize anyIts also important to transfer the stringent than OSHAs standards,splashes going into the ductwork.mist and air on the machine to a de-and OSHA often changes its stan- Big, splashy particulates will hit thevice that separates liquid aerosol dards to match ACGIHs guidelines. baffle plate and run off. from clean air. The goal is to move ACGIHs threshold limit value forWhen coolants splash around athe mist where you want it to go mineral oils is 5 mg/m for an eight- machine, they often drain downwithout using too much energy in hour time-weighted average and 10andrecirculate.Thisminimizesthe process.mg/m (0.01 ppm) for a 15-minutethe amount of liquid that ends upFilter mediums should be cho-short-term exposure limit. Otheras waste and reduces the cost ofsen based on the particle size of the metalworking fluids do not have alubricant. mist. Make sure a filter effectively specific threshold limit value, but keeping exposures as low as possi-ble is recommended.As more manufacturers switch from straight oil to synthetic, its important to note that plenty re-mains unknown about the exposure risks related to synthetic oil. This is also true of the detergents, emulsi-fiers and other additives used to en- World Class Manufacturer ofhance performance. Rotary Cutting ToolsPressure Point See us at ISA The first step to mitigate the prob- Atlanta, GAApril 21-22Booth 1301lem is to control submicron aero-sol mists that tend to stay airborne1985-2020in an enclosure. The mists should be evacuated from a machine and transferred to a controlled device, minus the big droplets. Use a high-pressure nozzle like a small garden hose to flood a part with coolant. The connection of the mist control-ler should be placed strategically on an enclosure, keeping in mind that you want to capture only the partic-ulates that likely will stay airbornenot the large splashes of water.Place a baffle plate in front of about the author Mike Meyer is executive vice president of technical services for RoboVent,anufactured in the U.S.Sterling Heights,M A ISO 9001:2015. CERTIFIEDMichigan. He is based in Anderson, SouthDistributed Aro eGlobeund thCarolina. For more informationwww.mastercuttool.comsales@mastercuttool.comabout the companys industrialPhone: (727) 726-5336Fax (727) 725-2532ventilation and filtration equip- 965 Harbor Lake Drive, Safety Harbor, Florida 34695ment, call 877-959-7639 or visit www.robovent.com.ctemag.com/cteguide.com53ShopSafety.indd 53 3/16/20 4:56 PM'