A new side milling cutter for stepless adjustment of groove width has been introduced by Paul Horn and is available through the firm's UK subsidiary, Horn Cutting Tools, Ringwood. The milling body features a central sleeve that enables the required groove width to be adjusted easily on a pre-setter.
Dimensional accuracy, stability and process reliability are assured, as the torque generated during machining is dissipated into the body. Horn offers two body types, the first having a cutting edge diameter of 100mm. It is equipped with 14 type 406 indexable inserts, which produce seven effective cuts ranging from 9.6mm to a maximum of 12.9mm wide. Milling depth is up to 20mm.
The second body type is equipped with 12 cutting inserts of type 409 and has a cutting edge diameter of 125mm. On this tool, the cutting width with six effective cuts can be adjusted between 12.9 and 18.8mm. Maximum milling depth is 32.5mm.
The successful 406 and 409 type indexable inserts have been chosen for the application. They are precision ground and achieve outstanding surface quality at the base of the groove and on the flanks. Double positive axial and radial rake angles ensure a soft cut. The tangentially screwed cutting insert's trailing chamfer produces a secondary cutting edge, resulting in outstanding machined surfaces. An additional free-form surface chamfer provides a stable wedge angle and very smooth milling.