Copy mills and inserts

Copy mills and inserts

Seco Round 20 copy mills and inserts are designed for use in myriad applications, including face, side, slot, plunge, and ramp milling. The cutters and inserts are suited for medium-to-rough milling in steel, stainless steels and heat-resistant superalloys as wee as applied to cast iron and hardened steels. Large-diameter inserts maximize material removal rates and offer a cost-effective means to generate an R10 mm radii with 20 mm round inserts.

June 10, 2025

Seco Round 20 copy mills and inserts are designed for use in a wide range of applications, including face, side, slot, plunge. and ramp milling. The Round 20 inserts are compatible with cutter bodies from previous generations and provide additional performance in challenging materials, the company says.

The new Seco Round 20 cutters and inserts are suited for medium-to-rough milling in steel, stainless steels and heat-resistant superalloys and can also be productively applied to cast iron and hardened steels. The large-diameter inserts maximize material removal rates and offer a cost-effective means to generate an R10 mm radii with 20 mm round inserts.

The inserts can be indexed to four, six or eight positions, allowing users to match the insert consumption to the depth of cut being taken. This flexibility also means the new inserts integrate with existing cutter bodies that index to four or eight positions.

Through the use of insert shims and cassettes, users can maximize the life of Round 20 cutter bodies. With these options, manufacturers reduce the risk of damaging an insert pocket and eliminate the replacement cost and potential downtime that accompany unexpected tool breakage.

Round 20 features sixteen available cutter bodies with four shim options and three cassette options as well as thirty indexable cutting inserts.

Glossary terms in this article

  • stainless steels
    Stainless steels possess high strength, heat resistance, excellent workability and erosion resistance. Four general classes have been developed to cover a range of mechanical and p…
  • depth of cut
    Distance between the bottom of the cut and the uncut surface of the workpiece, measured in a direction at right angles to the machined surface of the workpiece.
  • ramp milling
    Milling process in which the machine tool spindle is feeding simultaneously in an axial and radial direction.
  • superalloys
    Tough, difficult-to-machine alloys; includes Hastelloy, Inconel and Monel. Many are nickel-base metals.