Up Milling
In up milling, forces on the work piece tend to pull it out of the vise or fixture
holding it, so fasten it securely. These forces also push the work piece away
from the cutter, which eliminates backlash. Up milling is advised for milling
cast iron, softer steels, and other ductile materials. In general, it's how you
should perform milling operations.
Down Milling
Down milling usually produces good surface finishes because chips do not
sweep back into the cut. Setups are more rigid, an advantage when cutting
thin work pieces held in a vise or work pieces held in a magnetic chuck.
Down milling also produces straighter cuts. We recommend down milling
when using carbide cutters because there is less wear on the cutting tool. In
general, however, avoid it because of the backlash problems associated with
it.
Using the Depth Gauge
1.
Place the cutter or the drill onto the surface to be machined.
2.
Use the knob on the bottom of the depth gauge to set the depth you
wish the quill to stop.
3.
When the quill is advanced into the material, it will stop at the pre-set
depth.
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Summary of Contents for MI-329M
Page 1: ...Smithy MI 329M Operator s Manual 1 ...
Page 30: ...Chapter 13 Diagrams and Parts Listings 30 ...
Page 33: ...33 ...
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