Using cutting fluid – Smithy Midas 1220 XL User Manual
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toolbits for flycutters as you grind lathe tools (Section Seven).
You can also use flycutters for boring.
Note: When the tool revolves, the cutting tool becomes almost invisible, so be careful.
Figure 21.5 Flycutters take light face cuts from large surface areas.
Using Cutting Fluid
Cutting fluids get rid of heat generated by the friction of the milling cutter against the
workpiece. They also lubricate the interface between the cutting edge and the workpiece
and flush chips away. You can apply fluid in a stream (flood) or as a mist.
We recommend cutting fluids for steel, aluminum, and copper alloys. With cast iron and
steel, however, they tend to reduce the life of carbide tools, leaving tiny cracks along the
cutting edge. Follow the advice of tool manufacturers to avoid tool failure. Materials such
as cast iron, brass, and plastics are often machined dry. You can use compressed air to
cool tools and clear chips away. When doing so, wear a face mask and protective
clothing (Figure 21.6), and be careful to keep cast-iron dust from getting between the
lathe and carriage ways.
Figure 21.6 When using compressed air, wear a face mask and protective clothing.
21-5
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Midas 1220 XL Operator’s Manual