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    Proto·max ST Solid Carbide End Mill for Shoulder/Slot Milling

    April 26, 2012
    Walter USA's Proto·max ST solid carbide end mill provides material removal rates up to 50% greater than standard solid carbide end mills.
    Related To: Walter USA, LLC
    © Walter USA, LLC
    Proto-max ST end mill
    Proto-max ST end mill

    Proto·max ST solid carbide end mill provides superior performance in the machining of steel. Productivity-enhancing features allow this end mill to achieve material removal rates up to 50% greater than standard solid carbide end mills. These include an optimized geometry that provides enhanced stability for the cutting edges and a special surface treatment on the shank for a firm grip. In addition, it has a zirconium nitrite-based surface layer coating. 

    Due to its chemical composition, the coating has a lower affinity with steel, resisting build-up at the edges and boosting tool life. The Proto·max ST is available in a range of diameters from 1/16 to 3/4-in. (2 to 20 mm), and in three and four-flute designs. Variable flute spacing on the four-flute model reduces harmonics that can cause vibration.  

    There is a 45-deg. helix angle on the three-flute design while the four-flute design has a 50-deg. helix angle, both of which promote improved chip evacuation and surface finish. The three flute tool permits slotting depths of up to 2xD, with up to 1.5xD for the four flute tool.

    Taken together, Proto·max ST design features reduce cutting forces and spindle loading. This enables the tool to be used effectively in less-than-stable clamping arrangements or where there are irregularities in the workpiece. In addition to its primary steel application, the Proto·max ST can be used effectively on stainless steels. A version of the tool for hardened steel (ISO-H) is also available.

    Features:

    • Removal rates up to 50% greater
    • Diameters from 1/16 to 3/4-in. (2 to 20 mm)
    • Three and four flute designs

    Walter USA, LLC
    Greer, SC
    (800) 945-5554
    www.walter-tools.com

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