DNMG 150604 / DNMG 441, chip breaker BL, grade FM2543 — negative 55° rhombic turning insert.
1/2" inscribed circle, 1/4" thick, 1/64" corner radius. The BL breaker is the semi-finishing geometry: 0.004–0.012 ipr (0.1–0.3 mm/rev) at 0.04–0.12" (1–3 mm) depth of cut. FM2543 is a CVD grade — first-choice grade for general steel work — continuous through interrupted cuts across steel applications.
TURNING KNOW-HOW
Practical guides to choosing, understanding and using your inserts.
Explore the grade and chip-breaker selection chart for your turning operation.
Explore the chart 02 / INSERT CODESUnderstand turning-insert designations and what the letters and numbers mean.
Read the guide 03 / CUTTING PARAMETERSLearn how to use a turning formula calculator to work through the numbers.
Explore the formulas