4. Retract forming pins on T-DRILL
Head and attach T-DRILL T-60 to
counterplate. Notches on tube
support fit on tabs of counterplate.
5. Drill pilot hole, extend forming
pins, reduce speed, engage feed
mechanism, pull trigger to form the
outlet. Release trigger when forming
pins clear the rim of the outlet.
6. Notch and dimple both sides of
branch tube.
7. Align dimples with the run of the
tube after insertion into the outlet.
Braze the joint.
27
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