15
Model 301.5SP Tube Squaring Machine
92-1755 Rev. 200324
6.5 OPERATION SEQUENCE
1. Connect the Model 301.5SP to the power source.
1. Pull the Trigger to start rotation of the Cutting Head, Refer to section 7,
Cutting Speeds and Feeds.
2. Use the Feed Handle to feed the Shaft with the tool bit into the work.
3. The Metabo Motor Speed Control is in the Trigger Guard. Use it to adjust the
cutting speed.
CAUTION
CAUTION: The Two Speed Gearbox Knob should be in the 1st gear
position. If the Knob does not snap into the desired position, turn the
chuck by hand slightly until the knob snaps into place. Put the speed
control in the drill position.
•
To obtain a minimum burr tube end, avoid heat build up. When the tube
or the tool bit gets hot, the tube material starts to flow or push away from
the tool bit edge in the form of a burr, instead of being cut cleanly with a
minimum burr. Keep the RPMs low to avoid generating excessive heat. An
excessive cutting speed will generate unwanted heat.
•
Keep the chip curl loose by avoiding very deep cuts. A dull tool bit will not
do the job right, so be sure that there is a sharp tool bit mounted in the
Machine.
4. Rotate the Feed Handle clockwise to bring the Cutting Head and tube closer
together. The machining operation begins when the tool bit contacts the tube
or pipe.
5. If the tube end is not square to the tube axis, the tool bit will contact only a
small segment of the tube during each revolution. To avoid tool bit damage,
use a very slow feed rate until the tool bit contacts the tube continually for at
least one revolution.
6. Adjust the cutting RPM with the Speed Control Trigger until it is just above
the required cutting speed as the tool bit enters the cut. The tool will slow
down slightly as the cutting load increases. Apply additional power to hold the
cutting speed.
7. Observe the chip as the Machine is cutting. The ideal chip will come off in a
loose pig tail spiral. A chip that is coming off in a tight straight spiral indicates
that the feed is too heavy. A straight or slightly curled chip normally indicates
that the feed is too light. Back off the feed as required to break the chips and
let them fall away.
