17
10. BASIC WOOD TURNING
FIG.19
If the tool rest is positioned too far away from the
workpiece as shown in (Fig.19), the chisel, when correctly
held will again be too high on the workpiece. You will also
find that you have less leverage on your side of the tool
rest and it will be very difficult to hold the chisel.
With a large diameter workpiece, the tool rest can be
above the workpiece centre line and further out from the
surface of the workpiece than normal (Fig.20).
With a small diameter workpiece, the tool rest should be
closer to the surface workpiece than normal. As the
workpiece gets smaller the rest should be repositioned
(Fig.21).
10.6 POSITIONING THE TOOL REST FOR
CIRCUMFERENCE SCRAPING - FIGS. 21 - 24
When scraping, the position of the tool is not as critical as
it is for cutting operations. The chisel is normally held
horizontally, although it can be held at an angle to reach
difficult places. The wire edge of the chisel does the
scraping. Fig.22 and 24 show the result of a chisel being
too low or too high. Fig.23 shows the chisel positioned
correctly on the tool rest.
FIG.20
FIG.22
FIG.21
FIG.24
FIG.23
Handle
kicked up
Large
diameter
Small
diameter
No stock
removed
Edge digging in