b'Boring Ending For adjustment purposes, the precision-ground inserts in these fine boring tools are pushed radially by means of a tapered screw.than their ISO counterparts. He also touted the inserts positive cuttingindustries.geometries and very sharp cuttingNormally, if your part requires edges, which reduce cutting forcesthree different diameters and step and therefore make the inserts suit- lengths in one hole, that means you able for fine boring of thin-wall partsneed three tools and three manu-and other delicate components. facturing steps, which takes a long He said Hollfelder-Ghrings finetime, Hack said. But we can do it boring tools benefit from systemswith one customized tool made for that allow users to make micron-sizeall three diameters that machines adjustments to the inserts in theirthe complete bore in one pass, pocket seats to tightly control borewhich reduces cycle time.diameters. Together, he said, the pre- Although Hollfelder-Ghrings cision-ground inserts and highly pre- custom fine boring tools are a little cise adjustment systems make it pos- more expensive than competitive sible for the company to produce finestandard offerings, he said the ben-boring tools with two or three insertsefits outweigh the heftier price tag.instead of the single cutting edge onInthemodernmetalcutting conventional finish boring tools. world, everybody is talking cost per This is a big advantage for high- part, Hack said. We believe you volume production applications inwill be able to reduce cost per part the automotive industry and otherby using our tools.CTEHollfelder-Ghring36JULY 2021Boring.indd 36 6/17/21 11:04 AM'