Imco enDURO 525 end mills are the ultimate combination of strength and flexibility, and feature a solid core, reinforced cutting edges, variable indexed flutes and an advanced coating to create an "everyday" high-performance end mill that excels in both traditional and high-efficiency milling (HEM) tool paths, see below for details. The enDURO 525 series come with a heat-resistant caoting, 5 flutes at a 40 degree helix angle with 3 available end types: square, corner radius and ball-nose.
Amazing corner strength = Longer tool life, more parts per tool in nasty-hard metals.
Fine micrograin tungsten carbide substrate = Stability and stamina for high-efficiency machining at aggressive speeds and feeds.
Optimized rake and relief angles = Free cutting action generates better finishes and greatly reduces material warping.
Variable indexing = Reduced harmonic vibration, higher metal removal rates, longer tool life.
Five flutes, 40° helix = Maximum cutting edge engagement, higher metal removal rates, excellent finish.
Premium heat-resistant coating = Excellent hot hardness and wear resistance, longer tool life.
Ready to order in diameters of 1/8" to 11/ 4" = Exactly the tool you need.
Should you run HEM or not?
Traditional tool paths run well on very short runs and simple, shallow cuts. High-efficiency machining (HEM) excels when you can run an axial depth of cut that is 125% of the tool diameter or greater.
Traditional tool paths use straight-line moves, generating heavy tool engagement, intense pressure in the corners, and the potential for the tool to break. That means the machine "looks ahead" and slows down the tool or requires programming speeds and feeds that allow the end mill to survive sharp turns. For example, removing material from 316 stainless steel might use a radial depth of cut (RDOC) 30% of the diameter and an axial depth of cut (ADOC) of 125% of the diameter of the tool. The graphs below show in gray the results of this kind of test.
HEM can greatly reduce the cycle time of a job and improve tool life. HEM uses advanced tool paths that maintain consistent pressure on cutting tools and the machine spindle. HEM tool paths typically utilize light radial cuts (step-overs), deep axial cuts, and elliptical tool paths when slotting and pocketing. Returning to our example, a HEM technique would utilize an RDOC of 8% of the diameter, with an ADOC of 300% of the diameter. These results are represented in light blue below, and illustrate the potential for HEM to reduce costs through faster cycle times and increased tool life.
2483 RPM x [.0033 IPT x 4-flutes]
3361 RPM x [.0058 IPT x 7-flutes]
32.77 IPM x .150" radial cut per pass x .625" axial cut per pass
136 IPM x .040" radial cut per pass x 1.5" axial cut per pass