b'Theres nothing wrong with off-the-rack tools. But if you need that extra boost in cycle OSG USA time and tool life, its time to To avoid chip welding when milling aluminum, OSG USA offers toolsconsider your custom-made with a diamondlike carbon coating. option: GWS Tool Group.facturers have risen to the challenge.We are constantly coming out with a better version of what we did, Walther said. Tools that can reach a longer length and still keep chatter and vibration down are constantly evolving as the years go by.In addition to the various alloy compositions, alumi-num comes as cast or wrought workpieces. Parker said cast can be more abrasive depending on the percent-age of silicon. Therefore, cast aluminum often is ma-chined at a slower cutting speed than wrought. LMT Onsrud recommends starting at about 244 to 305 m/min. (800 to 1,000 sfm) when cutting cast 6061 alumi-num and 457 to 610 m/min. (1,500 to 2,000 sfm) when machining the wrought variety. GWSTOOLGROUP.COMThose numbers are fine and good starting points, he said. But at the end of the day, when you are trying ctemag.com/cteguide.com29Aluminum.indd 29 6/15/20 6:07 PM'