Page 70 - HOLE MAKING CATALOG p185-310

DEEP DRILLING - BTA SYSTEM USER GUIDE

Technical Information -
Adjustable Counter Boring Head Diameter Settings

Drill diameter is adjusted with an adjust ball for diameter ø25 - ø39.99 mm with the following method.

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

Dimensional guide pad Adjust ball
Head body

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

254 ISCAR