HM Machinery SBM 28B, Руководство пользователя, Страница: 9 / 76

taper. They will usually be the Morse taper or ISO type. The drill shanks should have the
corresponding taper to the spindle in which they are to be fitted, or parallel shank if they
are going to be fitted by means of a tool holder. Contact the tool manufacturer for any
further information. Do not ever use tools which were not designed to be used in a drilling
machine.
A drilling machine can also perform other machining operations apart from the drilling,
such as tapping, reaming, chamfering, punch marking, countersinking, spot facing. To
perform such operations, it is necessary to have appropriate tools, specially designed for
this sort of jobs. In the tapping case, besides using correct tool, the machine has to be
provided with such a device that verses the turning direction of the tool when it reaches the
depth previously fixed.
3. CORRECT USE OF THE MACHINE
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Not exceeding its working capacity.
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Operating the machine by qualified and trained staff, and according to the points
mentioned in the instruction book.
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Working under the safety systems provided with the machine, checking them and
keeping them.
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Watching the safety measures mentioned in the instruction book and notices on the
machine.
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Wearing clothes which provide personal safety as mentioned in the instruction book.
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Watching the safety measures which may affect work on the machine, and that can be
lawfully expected, as well as those demanded in the workshops.
4. PIECE CLAMPING.
Tangential cutting forces and axial forces in the feed direction of the tool are mainly
produced during the drilling process. The tangential forces produce a moment of forces
which make the piece being drilled turn. Therefore, the pieces to be drilled (or to be
machined by one of the operations mentioned above) must be clamped in an appropriate
device, such as a drill chuck, and the drill chuck must be correctly clamped to the machine
table. For this reason the machine tables are provided with “T” slots.
The pieces must be clamped conveniently by some clamping device.