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Example: When setting a drilling depth of 20 mm and the 0-point is 100 mm, set the drilling
depth to 77 mm. NOTE! The mechanical design means that it has to be set this way.
• Push the inner ring's (3) stop heel (4) against the top side of the stop pin (5).
• Turn the grooved ring's (6) stopper toward the top of the stop heel.
• Tighten both of the female screws before releasing the spindle.
• Check the measurements and adjust the drilling depth.
2
1
4
5
3
6
Picture 2. Inserted coupling Picture 3. Withdrawn coupling
Adjusting the Feed Coupling
The feed is set at the factory so that the machine cannot be overloaded. However, after using the
machine for a while, the coupling may need to be adjusted. Adjusting:
• Remove the top on the claw coupling.
• Rotate the ring nut clockwise to the next position on the locking washer. This provides
greater feeding power.
• When drilling with sensible boring tools, it may be necessary to use a lower power for
feeding. Adjustments are made as above, but the ring nut is rotated counter-clockwise. In
the event that the drill pressure is too high, the coupling acts as an overload protection.
Automatic Reversing
• Push the power switch to the threading position. It will light up when used (see
picture 4).
• Set the desired threading depth with the drilling depth stopper.
If the thread depth is set, the spindle automatically changes its direction of rotation by changing
the phases to the motor.
The speed of the spindle should not exceed the lower work range 65 -670 rpm in order to keep
up the torque. In order to get better quality threading, we recommend using a floating tap
wrench.
NOTE! Do not use automatic feeding during reverse threading.
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