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There are several methods for checking the height of the tool bit. Perhaps the
simplest way is to place a thin strip of metal, such as a steel rule or feeler
gage, between the work piece and the point of the tool bit. If the height is
correct, the strip of metal will be held vertical. If the top is leaning toward
you, the tool bit is too low. If the top is leaning away from you, the tool bit is
too high.
Using the standard tool post, you adjust the tool bit height using shims under
the tool bit. You can get an economical set of shims, about the right size, at
any auto parts store. Purchase a set of feeler gages and remove the pivot pin.
The easy way to adjust the tool bit height is to get a quick change tool post.
Virtually all quick change tool posts incorporate a mechanism for easily
adjusting the tool bit height.
Turning
The most common use of a lathe is turning down the diameter of a work piece.
Manual Turning
Follow these steps to turn the outside diameter of a work piece.
To turn manually:
1.
Put a tool bit in the tool holder and adjust the cutting edge to center
height.
2.
Angle the tool so that the front cutting edge forms an acute angle with the
axis of the work piece, as shown in the illustration below.
3.
Move the carriage so that the tool bit is near the right end of the work
piece.
4.
Turn the lathe on. Adjust the speed to an appropriate speed for the
material and diameter you are working on. The LittleMachineShop.com Web
site has a
calculator to help you determine appropriate cutting speeds
.
5.
Using the cross slide feed handle, slowly advance the tool bit into the work
until it just touches the surface of the work piece.