Smithy Midas 1220 XL - Manual (Page 65)

Figure 12.3 You can do other turning cuts with different cutter bits and cutting tools.
Machining Square Corners
To machine an accurate corner, follow these steps:
1.
Set the compound rest perpendicular to the line of the center and insert a right or
left-hand corner tool.
2.
Using the longitudinal feed, turn a small diameter to finish up to the shoulder.
3.
With the compound rest, feed the tool the amount needed to finish the work to the
length, taking to the last facing cut across the shoulder away from the center.
Finishing and Polishing
After machining, you’ll want a smooth, polished surface free of machine marks. You’ll
obtain the best results with a toolpost grinder. If you don’t have one, use a file.
With a file, take full, biting strokes across the revolving workpiece at a slightly oblique
angle. Do not drag the file back across the workpiece; instead, lift it clear for each return
stroke. Use a clean, dry file and keep the workpiece clean, as well. Wipe the workpiece
dry and clean if you’ve used coolant or cutting oil. Never hold the file stationary while the
workpiece is revolving (Figure12.4).
Left Hand
Turning
Left Hand
Facing
Finishing Cut
Right Hand
Facing
Left Hand
Corner
Parting or
cutting off
Special-form cutter
Right Hand
Corner
Turning with a roundnose cutter
Right Hand
Turning
12-3 Or Visit www.smithy.com
Lathe Turning