b'Productive Timeshe was hesitant to test shrink-fit holders because he was not familiar with Haimer products and their price points were at least double what he was used to spending for holders.I just couldnt justify spending more on a holder upfront, he said. It seemed irresponsible to spend that much just to have someone slam it into a vise.Nonetheless, Artibani agreed to test a few shrink-fit holders and was asked to run any job that the shop previously ran using a proven pro-gram, with the only change being the toolholder.Instantaneously, he said, there was a difference in the sound. All the cutters ran whisper quiet.Artibani also said tool life in-creased up to 300% on some tools.After that, he said, we just started cranking the feed rates up until we got to where we were ei-ther snapping cutters off because the cutter couldnt hold up or we were at the limitations of the ma-chine. Now we incorporate that into our everyday programming, so the speeds and feeds are three times what they used to be on average.When endmilling aluminum, for example, Artibani said Raym-Co went from 1,270 to 1,524 mm/min. (50 to 60 ipm) to 7,620 mm/min. (300 ipm) on average and as highRaym-Co reports that it was able to triple or quadruple machining parameters afterHaimer USAas 25,400 mm/min. (1,000 ipm) onswitching to shrink-fit toolholders.some applications.Even at elevated cutting speeds,To heat a holders bore so it ex- cooling area while you heat a sec-vibration is not a concern. pands enough to accept a toolond tool, Artibani said about the Chatter issues just dont existshank and cool it so the tool isbenefit of an additional base.anymore, Artibani said. If we haveheldsolidlyinplace,Raym-CoHe said this capability enables chatter, its because the machine istook the recommendation of MikeRaym-Cotosetupashrink-fit shaking on the floor. OConnor, regional sales managerholder as quickly as or quicker than He said he quickly learned thatat Haimer USA, and purchased aassembling a collet chuck, primar-holding tolerances was effortlessPower Clamp Economic Plus NGily because a collet chuck must with the shrink-fit toolholders. Raym- shrink-fit machine with an adjust- be checked for runout. Heating a Co holds 0.005 mm (0.0002") onable coil and two bases. holder consumes 10 seconds while location and hole size without hav- You can heat one tool and movecooling it takes 30 to 60 seconds.ing to try. it to the side and have it in theArtibani said the company doesnt 42DECEMBER 2020 ProTimes.indd 42 11/15/20 10:08 AM'