Intended for grooving and parting off on sliding-head lathes, a new chip
breaker geometry has been introduced by Horn for its 274 carbide insert tool
system. Pressed accurately, repeatably, at high speed and therefore
economically into each green blank before it is sintered, the 1A geometry
optimises chip control during turning, ensuring a high level of process
reliability.
The universal geometry is suitable for machining various materials. The
indexable insert with two cutting edges is available in three cutting widths of 1
mm, 1.5 mm or 2 mm. Maximum grooving depth is between 3 mm and 6 mm.
The insert is available in the PVD-coated carbide grades TH35 and IG35. An
extensive range of holders is available for adaptation to different types of
sliding-head lathe.
When machining turned parts of small diameter, the centre height of the tool
must be precise, as even small deviations have a negative effect on the quality
of the workpiece. Ideally, the machine operator should be able to index the
insert without having to readjust the centre height. With the 274 system, Horn
delivers excellent repeatability of less than 0.02 mm after turning and
reclamping the double-edged insert. This is made possible by precise
peripheral grinding of the insert in conjunction with a stable insert seat.
