b'So FineFigures courtesy of Sandvik Coromant cartridge. Clamping screw 6 with Figure 4 washer 7 and thread retainer 8 are similar to the original design. The game changer is the incorporated differential screw 4 pared with push pad 9. Both threads on the differ-ential screw are made of the same lead but different pitch. For exam-ple, one thread can be M4 mm and the other M4.25 mm. This makes the resulting pitch 0.25 mm, which is much smaller than a traditional de-sign (0.7 mm).In addition, radial adjustment The normal installation ofscrew 4 is positioned on an angle the improved cartridge is = 60 degrees to refine the res-presented. olution of adjustment even more. The actual resolution of adjustment Figure 5 in 10CA cartridges is 0.019 mm (0.0007") per 90 degrees of rotation of the adjustment screw. In practi-cal application, an operator can de-pendably adjust the position of the cutting edge with an accuracy of up to 0.001 mm (0.00004").Another benefit of the push pad is strong support in the area where the radial vector of the cutting force (Fr) has the highest impact and re-duced ratio L/l. (See Figure 4.)A quintessential feature of this design is the flexible body of the cartridge, which is created by recess 10. (See Figure 3.) It requires and al-Von Mises stress is shown inlows constant pre-loading between the recess area at maximumcartridges and the host cutting tool. deformation. One positive effect of this is zero backlash in the differential couple Figure 6 and, as a result, smooth adjustment in both directions: up and down. There is also no need to release the cartridge clamping screw when performing an adjustment. This dramatically reduces maintenance time and makes the tool much more user-friendly.When nominal pre-load in the car-A common multistation boringtridge body was calculated, Sandvik tool is illustrated with a fineCoromant took into consideration adjustment cartridge. the following factors:n Additional maximum deforma-48APRIL 2023Inserts.indd 48 3/16/23 1:54 PM'