Machining Recommendations

Notes on Multi-Functional Machining (MF·MS and MM 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


Precautions When Finishing Walls

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 .040"–.059" short of the end point, then remove the ring by plunging.

Notes on Multi-Functional Machining (BM Breaker)



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.

Notes for Cutting Off




When the cutting edge approaches the center, reduce the feed by 50%.
If necessary, stop the feed prior to reaching the center of the workpiece to prevent it falling under its own weight.


<Spindle speed>

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.



When there is a center 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.

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