Notes on Multi-Functional Machining (MF,MS,MM and BM Breakers)

Machining Narrow Grooves

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.

Machining Wide Grooves

It is recommended that cross-feed machining is used.

Machining Wide Grooves

Machining Wide Grooves

Precautions When Finishing Walls

To produce high accuracy walls using MS or MM breaker insert, do not carry out back turning. Plunging is recommended.

Wall Machining

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.

Machining of a Ring Section

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.

Notes on Multi-Functional Machining (BM Breaker)

Copying

With the BM breaker insert, 3 dimensional copying is possible. Set the depth of cut (APMX) to 40% less than the insert width.

Roughing

Use plunging and cross-feed machining. When machining the corner, vibration is likely to occur. To avoid this, reduce the feed by 50%.

Finishing

Carry out finishing in one process.
For the depth of cut (APMX 2) when back turning, refer to the table on the right.

Notes for Cutting Off

Feed

＜Feed＞

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.

Revolution

＜Spindle speed>

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.

Insert

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.