Sumitomo launches end mill and slot drill range

Extending the range of solid-carbide end mills and slot drills defined by Sumitomo Electric Hardmetal as its “global standard”, the GSX Mill series is now available. The latest milling cutters have been developed based on a fine carbide substrate to increase toughness. GSX Mill tools also have a high transverse rupture strength and provide high levels of shock resistance with enhanced orders of consistency and reliability, especially in wet cutting conditions.

Sumitomo’s GSX Mill series, covering tools between 1 and 25 mm diameter, has a special flute design and large rake angle. The cutters come in many varieties, covering two, three and four-flute types, in four different lengths of flute. A novel combination of flute design and rake angle enables effective chip evacuation from the cutting zone, while the specific design of two cutting edges improves sharpness and extends the type of workpiece that can be machined. Indeed, each cutting tooth has a gashed land that strengthens the flute and increases resistance to fracturing. Meanwhile, with the inclusion of Sumitomo’s latest Super ZX coating, resistance to both wear and heat is enhanced.

End mill and slot drill applications cover surface milling, drilling and grooving, with two types of cutting edge profiles. The sharper edged S-Type is suitable for removing inside corners when finish-cutting, while the strengthened edge C -Type, having a gashed land, creates higher resistance to fracture for both roughing and finishing cycles. A wide spectrum of materials is covered by both types, helping to reduce tool inventory. These materials include carbon and alloy steels, hardened steel up to 55 HRc, stainless steels, titanium, heat-resisting alloys and cast iron.

The GSX-SLT slot-type cutter is a multi-purpose tool developed for plunge drilling and slot milling, having a large rake angle for speedy chip removal. GSX-SLT features a sharp edge, making it even suitable for cutting thin sheet material and for use with lighter duty and smaller machining centres. The cutters are available in two-, three- and four-flute versions, having between 1.5xD to 4xD flute length. There is also a special three-flute version for more compound-type milling applications.

Also within the GSX Mill series is the GSXVL, which is an anti-vibration, square-type cutter for shoulder milling with an optimised irregular pitch and lead angle that improves resistance to chatter on higher speed and feed cycles due to its ability to reduce cutting forces. Rounded land versions are also available to further enhance surface quality.

The Sumitomo GSXB Mill ball-type cutter has two flutes and a large 30° helix angle that reduces any resistance to cutting forces, so is suitable for milling hardened steel up to 60 HRc, titanium alloys and cast iron. GSXB can also be deployed on softer steels due to an expanded and widened pocket area that aids the evacuation of chips.