• MICRO-MINI can be applied to boring and grooving as it is. But, it can also be reground as shown below.
• For shaping and regrinding, use diamond whetstone approximately #250-#400. Please grind according to application using the figure below as a reference.

1. To avoid chipping of the 2nd cutting edge take care when inserting the boring bar into the holder. Refer to fig.1. If the 2nd edge contacts the internal face of the holder there is a possibility that it may chip.
2. When using this type of holder there is a possibility that damage to the shank and the 2nd cutting edge can occur. Make sure that the clamping screws are tightened to the set torque value. Additionally make sure that there is no clamping screw near the 2nd cutting edge as this can break the boring bar.

When using Mitsubishi holders:
When using holders with a tool overhand of recommended quantity, ensure that the 3rd clamping screw is removed prior to machining. The set torque value for clamping screw is 2.0 N·m.

1. When installing the boring bar into the holder, tighten the clamping screw against the micro-mini twin boring bars so as to make contact with the reference plane of the square type holder.
2. Make sure that the clamping screws are tightened. The recommended set torque value is shown in the table of standard boring bar. Sufficiently tighten the clamping screw, otherwise clamping rigidity cannot be guaranteed.
3. Don't tight the clamping screws without setting the micro-mini twin boring bars, otherwise the clamp bridge can be deformed.