It is recommended to carry out plunging in several passes.
Following the steps above makes it difficult for chips to elongate.
This also improves the accuracy of workpiece wall surface.
It is recommended that cross-feed machining is used.
To produce high accuracy walls using MS or MM breaker insert, do not carry out back turning. Plunging is recommended.
When machining a wall, chip jamming can occur. In this case, stop cross feed machining just before the wall (at a point less than the insert width) then remove the remaining material by plunging.
When a ring remains in a cross feed end process, finish cross feed machining 1–1.5mm short of the end point, then remove the ring by plunging.
With the BM breaker insert, 3 dimensional copying is possible. Set the depth of cut (APMX) to 40% less than the insert width.
Use plunging and cross-feed machining. When machining the corner, vibration is likely to occur. To avoid this, reduce the feed by 50%.
Carry out finishing in one process.
For the depth of cut (APMX 2) when back turning, refer to the table on the right.
When the cutting edge approaches the centre, reduce the feed by 50%.
If necessary, stop the feed prior to reaching the centre of the workpiece to prevent it falling under its own weight.
When using constant cutting speed during a cutting off cycle, it is recommended to limit the spindle speed to 80% of maximum to ensure stability.
To prevent the workpiece from being expelled, lower the spindle speed before finishing the grooving operation.
When there is a centre stub on solid bar work or burrs are formed on pipe material, it is possible to decrease them by using a handed insert.
With a handed insert, machining tends to be less stable when compared to using a neutral insert.
Pay special attention to avoid fracturing of the cutting edge and decrease the feed when necessary.