The 304 circular milling system

Paul Horn GmbH has extended its range of products for circular interpolation milling to enable the productive machining of holes with diameters of 8 mm (0.315")or more. With its triple-edged 304 milling system, the tool manufacturer is offering a versatile solution for groove milling, finish boring and chamfering.

The insert has a cutting circle of 7.7 mm (0.303"). In conjunction with the vibration-damping carbide shank, this makes it more flexible to use than solid carbide groove mills. The substrate and geometry can be easily matched to the machining process. The shanks feature internal coolant supply for targeted cooling of the contact zone.

The groove milling inserts are available with cutting widths (w) of 0.5 mm (0.019"), 1 mm (0.039"), 1.5 mm (0.059") and 2 mm (0.079"). For milling circlip grooves, HORN offers the system with cutting widths of 0.8 mm (0.031"), 0.9 mm (0.035"), 1.1 mm (0.043") 1 (0.039") and 1.3 mm (0.051"); and, in the case of the full radius version, offers radii of 0.4 mm (0.157"), 0.6 mm  (0.023") and 0.8 mm (0.031"). To enable the milling of chamfers, angles of 45, 30 and 15 degrees are available. As regards the substrates, HORN relies on coated grade EG55 for general steel machining and IG35 for the machining of stainless steels and superalloys.

The Horn circular milling system offers users a host of process advantages: it is fast, reliable and achieves good surface finish. During the process, the tool plunges into the material either at an angle or horizontally, and is then interpolated on a helical path. This means that threads, for example, can be manufactured to a high level of reproducible quality. When compared to machining using indexable inserts for larger diameters or solid carbide milling cutters for smaller diameters, circular interpolation milling is generally more economical. Circular interpolation milling cutters have a wide range of applications: they are able to machine steel, special steels, titanium and superalloys. These precision tools are especially suited to groove milling, circular interpolation milling, thread milling, T-slot milling and profile milling processes.