Mini Metal Lathe – BMLAT-07
E&OE
© 2020 Baumr-AG
16
•
Forward/Neutral/Reverse lead screw lever. If Auto feed is not required, set to 'Neutral'.
•
HIGH/LOW lever. Select required speed range.
Switch the machine ON as described under
and slowly feed the cutting tool into the work
using the Manual Feed handle. Proceed until you reach the previously marked line on the work, then retract the
tool one or two complete turns on the Cross-Slide feed handle. Crank the carriage/saddle back to the beginning,
then crank the tool the same number of turns 'in', plus the depth of desired cut, and proceed to cut once more.
NOTE
: This describes the procedure for general, rough cutting. For other types of cuts - finishing, cutting
shoulders etc., you should consult a suitable handbook.
Simple Turning with Power Feed
The same basic setup is used as described above, except that, before starting, the lead screw F/N/R Lever (25,
on the rear of head stock) is set to the 'Forward' position and the Auto feed Lever (13), is operated in order to
drive the carriage/saddle. As mentioned previously, the rotational speed of the lead screw, and hence the rate of
feed of the tool, is dependent upon the gear configuration of the gear train. The feed rate for normal turning is
considerably less than that used for screw cutting.
The lathe is factory-configured for normal turning; however, if you have been screw cutting, always remember to
reset the gear configuration to that for normal turning. Please refer to the chart on later page which shows the
gear configuration, and the explanation of how to change the gears.
1. Taking all precautions previously mentioned, position the cutting tool a short distance to the right of the work
piece with the appropriate depth of cut set on the cross-slide.
2. Ensure the lead screw F/N/R lever is set to 'Forward' and select 'Forward on the Forward/Off/Reverse switch
on the main control panel. Switch on the machine.
3. Turn the knob to achieve your desired spindle speed with your right hand and push down on the auto feed
lever until the nut becomes firmly engaged with the lead screw.
IMPORTANT
: Your left hand should always be free in order to hit the emergency stop should it become
necessary.
4. Carefully observe the movement of the tool and as it approaches the mark on the surface (denoting the end
of cut), pull the Auto Lever UP sharply and ensure it stays UP. If a degree of accuracy is required, it is
recommended that you finish the cut by hand.
NOTE
: If you require a shoulder with perfectly clean corners, then you need to use an appropriately shaped
tool.
5. Retract the tool one or two complete turns on the cross-slide feed. Then crank the carriage/saddle so that
the tool is at the start point once again. Advance the tool the same number of turns, plus the depth of cut,
and when ready, push down the auto feed lever and proceed to take another cut.
Bevel Cutting
Bevel cutting involves the use of the compound slide, which is mounted on the cross-slide and set at right angles
to it (indicated by the zero mark on the body of the cross-slide) for all normal cutting operations.
To set the compound slide so that the cutting tool will cut a bevel, first retract the slide until the two socket head
screws (A) are revealed as shown in Fig. 8.
Loosen the screws sufficiently to allow the compound slide to be turned to the desired angle, as indicated on the
scale, and secure the slide in this position by retightening the socket head screws.
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