What is the High-Feed Milling insert?   

Insert: SDMT13

Cowee’s inserts are designed to remove a certain size chip, a value commonly expressed as feed per tooth. To be Mounted at a 90-degree lead angle, a straight insert at the properly calculated rpm will produce a chip that is theoretically the same thickness as the programmed feed per tooth. Reduce the lead angle, however, and the chip becomes thinner because the cut is spread over a wider portion of the edge. Arriving at optimal chip thickness requires increasing feed per tooth to compensate.

High-feed inserts are mounted at lead angles ranging from 5 to 11 degrees, push this chip-thinning effect to the extreme. In fact, Cowee inserts can run at four times the feed rate as a 45-degree-lead-angle tool while maintaining the same chip thickness. these and other high-feed insert also have large, rounded edges that further contribute to chip thinning.

These design features also contribute to the stability required to run at the parameters typically associated with high-feed cutting. The large edge radius, for example, adds strength by distributing cutting forces for more even tool wear. And, along with the low lead angle, it serves to direct machining forces axially up into the spindle rather than radially against the side of the tool. With a lower side load, the tool experiences less vibration and is less likely to pull out of the spindle. Beyond geometry, high-feed tools tend to use TiAlN-based chemical vapor deposition (CVD) coatings to disperse heat, aid chip evacuation and reduce built-up edge. One such coating is designed for more aggressive cutting While suitable for a range of materials and applications. Depending on the material, the grade and design support cutting depths ranging to 2.1 mm at 3-mm-per-tooth feeds, compared to 1.2-mm depths at 3-mm-per-tooth feeds. The Cowee line includes round-shank and screw-on milling cutters in four diameters: 20, 25, 32 and 40 mm. Cowee expands that range with four interchangeable tool bodies offering cutting diameters of 63, 80, 100 and 125 mm. All holders feature inner cooling and TiN coating to protect against chip wash.