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USER GUIDE
DEEP DRILLING - BTA SYSTEM
Technical Information -
Adjustable Counter Boring Head Diameter Settings

Drill diameter is adjusted with an adjust ball for diameter ø.984 - ø1.574” by use of the following method.

1. Slide the dimensional guide pad forward and then
re-tighten the lock screw at the measuring position.

Dimensional guide pad
Head body Adjust ball

Insert
2. Tighten the adjust screw.

Adjust screw
Wrench
Drill Dia. øDc

3. As the adjust screw moves forward, insert
moves in a peripheral direction.

4. Measure the diameter with a micrometer. If the diameter is larger
than expected, loosen the adjust screw and insert screw, then
re-tighten the insert screw. Repeat the procedure from step 2.

Drill Dia. øDc

310 ISCAR