b'Productive Timeseffective, Sacco said, and Radax im- while maintaining the toughness.broaches and applies them when mediately ordered more. Conventionalheat-treatedHSSworkers are present at a machine, Rooney stated that Rayco #7 iscreates this fine structure but at aSacco said. The tool life is almost made of a special-purpose HSS thatlower hardness, therefore lackingthe same, but I dont want to push it.exhibits high hardness, enhancedthe wear resistance compared to aIn addition to lasting twice as abrasion resistance and toughness.Rayco heat-treated broach. long as the previous rotary broach, The broach is suitable for machiningAlthough Sacco has broachedSacco said Rayco #7 broaches cost materials with tensile strengths ex- up to 1,800 parts made of 17-4 PH25% less. These #7 tools give us ceeding 190 ksi and a hardness upstainless with a Rayco #7, he nor- the ability to run longer production to 50 HRC. But he emphasized thatmally replaces the broach after theruns overnight without having to having a source for the substratecounter on the control of a Tsugamiworry about a heap of scrap in the wont enable another toolmaker toSwiss-style machine reaches 1,000morning. We had no confidence duplicate the performance of Raycopieces. We know if we pull it out atbeforezero.broaches. that time, there is virtually no causeHe said Radax also applies the Its not the HSS material butfor failure, and we just keep run- broachtomachineavarietyof the Rayco heat-treat process thatning, he said. That way, we haveother metals, including titanium makes all the difference, Rooneyzero defects. and S-7, 15-5 and 316 stainless. noted. Our process creates a finerThat point isnt the end of a toolsIve switched all our broaches to grain structure at a higher hardnesslife, however. Radax refaces usedRayco.CTEAre you a metalworking professional who wants to write?CUTTING TOOL ENGINEERING is seeking individuals with knowledge of machining and strong writing skills to write articles. Please send your qualifications to:CUTTING TOOL ENGINEERING, 1 Northfield Plaza, Suite 240, Northfield, IL 60093. Call 847-714-0175, or email [email protected] 2019 ProTimes.indd 76 6/14/19 9:17 AM'