Tungaloy Expands Cutter Diameter Lineup of DoTwistBall Copy Mill Series

Iwaki, August 2019 — Tungaloy is expanding its DoTwistBall line of copy milling cutters to include additional diameters of shell mills.

DoTwistBall is designed to ensure maximum machining reliability during complex 3D milling processes. The insert is constructed in a helically twisted structure which fits the seat constructed in a matching helical profile. This design provides secure insert positioning and fixation with anti-twist protection during machining. In addition, the strong, thick design of the insert helps to withstand machining impact preventing insert fracture. The cutter body can accommodate either round LNMX-MJ inserts with 4.0 mm, 5.0 mm, or 6.0 mm nose radius or LNMX-HJ inserts for high feed milling, making the cutter extremely effective for machining complex curved surfaces typical in die and mold industries.

The new cutter diameters include ø42 mm, ø52 mm, and ø63 mm in popular shell mill bodies to accommodate the LNMX04 inserts.


  • At a Glance
    • Innovative insert-seat interface ensures superior insert fixation for process security
    • High feed inserts or radius style inserts can be used on the same cutter body
    • Total of 3 cutter bodies are added in this expansion