b'tion of 0.2 mm (0.008") for com- ing a roughing operation while oth- of the cartridge from the hosting pensation of the cutting edgeers are finishing and chamfering. body. On another side, centrifugal wear. The fact that the speed of the ro- force increases stress in the critical n The effect of centrifugal forcetation nis presented in a powersection. For example, if this tool is rpmfor high-speed applications of two tells the importance of con- rotating at n = 8,000 rpm and the rpm for example, machining of alu- sidering the effect of centrifugalmass of the front part is m = 0.0199 minum with PCD inserts. force on the nominal pre-load ofkg at 0 rpm, then centrifugal force n Maximum stress in the criticalthe cartridge. On one side, cen- will reach 489 N (110 lbs.).cross section of the body. (Seetrifugal force is reducing the pre- Based on deep engineering anal-Figure 5 on Page 48.) load by trying to lift the front partysis, Sandvik Coromant established Maximum additional deforma-tion of the cartridge front part is necessary to compensate for di-mensional wear of the cutting edge for the duration of the complete operation. The intent of the design was to stay within the linear range of deformation and prevent fatigueTHE NAME TO KNOW FOR.failure. After the worn insert is in-dexed and the cartridge is adjustedLIVE TOOLS / ANGLE HEADS to nominal dimension, stress is au-tomatically reduced to the nominal. SPEED MULTIPLIERS/ SWISS COMPONENTSIn the case of high-speed ma- MARKING TOOLS / KNURLING TOOLSchining, the front part of the car-tridge harnesses centrifugal force in accordance with equation (1):F = 0.01097 m r n 2 (1)c rpmWherem = mass in kgr = radius of center mass in mn = revolutions per minuterpmA typical boring tool for machin-ing multiple surfaces is shown in Figure 6. Front inserts are perform-about the authorsPlatinum Tooling is the exclusive North American importer of Heimatec Live Tools and Angle Heads, Tecnicrafts Swiss Colletsand Guide Bushings, Henninger Spindle Speeders,KocherovskyHolbrook AMF Cleaners and Markers and Quick Knurling and Marking Tools.Eugene Kocherovsky is productPlatinum Tooling offers a wide selection of machine tool development engineer foraccessories for most machine brands, including standard and custom the automotive engine grouptools to help with the most challenging applications.and Curt Holbrook is manager of automotive engineeringIf you need live tooling, were here to help.projects at Sandvik Coromant Co. in Mebane, North Carolina.16 E. Piper Lane, Ste.128|Prospect Heights, IL|847-749-0633For more information, call 800- [email protected]|www.platinumtooling.com726-3845 or visit www.sandvik.coromant.com.Platinum Tooling AD5982 Island Half CTE 2022 49ctemag.com/cteguide.com Inserts.indd 49 3/16/23 1:54 PM'