b'The speeds and feeds are three times what they used to be on average.checktherunoutonshrink-fitCleaning is actually the mostHe said the solid-carbide and holders unless it is circular interpo- important part of the process, heHSS endmills that the shop ap-lating a tight-tolerance hole, whichsaid. plies range from 0.2 mm to 32 mm used to be boreda slower pro- Sinceimplementingshrink-fit(0.008" to 1.26") in diameter, and cessbefore the shrink-fit holdersholders into its operation, Raym- shrink-fit holders are suitable for arrived. Co no longer uses mill chucks butroughing and finishing.It is extremely rare that the toolstill uses collet chucks for a lot ofArtibani estimates that the re-is running out, he said. drilling and tapping and uses sideturn on investment was about three Artibani said runout occurs mostlylock holders for work that doesntweeks for the first purchase of 15 when a toolholder is not cleanedrequire a tight tolerance. holders and the shrink-fit machine. properly before accepting a toolI would say 80% of our tools,After purchasing 30 more hold-shank. To correctly clean a holderArtibani said, such as endmills, areers six months later, Raym-Co has of any carbide residue or other de- going in a shrink-fit holderandadded another 30 each year.bris, operators clean the bore witheven a lot of our high-end drills. IfMy return on investment was an appropriate-size wire brush andwe are doing deep-hole drilling, weprobably more instant than any-thoroughly wipe the holder withwant high precision and are puttingthing else I have purchased for the rubbing alcohol. those in shrink fits. company, he said.CTEAd IndexADVERTISER NAME PAGE # ADVERTISER NAME PAGE #AMAMCO Tool19 MERSEN12Ceratizit USA Inc.31 Nachi America (Cutting Tools)5CJT Koolcarb Inc.39 Norton | Saint-Gobain Abrasives13GMSi Group Inc.15 NT USA Corporation36Greenleaf Corporation24-25 Platinum Tooling Technologies Inc.20The Grinding Doc40 Royal Products40GWS Tool Group35 Star SU LLC11Iscar USACover 2 Tungaloy America Inc.2J.W. Done Co.37 UNISIG33Kyocera Precision ToolsCover 4The Advertisers Index is provided as a courtesy to advertisers. Every effort is made to avoid errors, but should one occur, CTE is not responsible.Reviewed by the Engineering Index.Cutting Tool Engineering (ISSN:0011-4189) is published monthly. Copyright 2020 by CTE Publications Inc., 1 Northfield Plaza, Suite 240, Northfield, IL 60093-1213. All rights re served. Periodicals postage paid at Winnetka, IL 60093 and additional mailing offices. Circulated in the U.S.A. to qualified individuals concerned with the material-cutting function in industry. For others, subscriptions are $75 per year in the U.S.A.; $125 in Canada. Other foreign subscriptions are $125 per year; overseas delivery via airmail, $195. EditorialProduced in the U.S.A.and advertising offices: 1 Northfield Plaza, Suite 240, Northfield, IL 60093-1213. Phone (847) 498-9100; Fax (847) 559-4444. This magazine is protected under U.S. and international copyright laws. Before reproducing anything from this publication, call the Copyright Clearance Center Inc. at (978) 750-8400. CTE Publ ications makes every effort to ensure that the processes described in Cutting Tool Engineeringconform to sound machining practices. Neither the authors nor the publisher can be held responsible for injuries sustained while following procedures described herein. Postmaster: Send address changes to Cutting Tool Engineering, PO Box 1487, Cedar Rapids, IA 52406-1487. Canada Post: Publications Mail Agreement #40065725. Canada returns to be sent to 2835 Kew Dr., Windsor, ON N8T 3B7. ctemag.com/cteguide.com43ProTimes.indd 43 11/15/20 10:08 AM'