WOODTURNING OPERATIONS cont’d
If the tool rest is positioned too far away from the
workpiece as shown in Fig.38., 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 centreline and further out from
the surface of the workpiece than normal as shown in
Fig.39.
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 as shown in Fig.40.
POSITIONING THE TOOL REST FOR
CIRCUMFERENCE SCRAPING:
When scraping, the position of the tool rest 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.40 and 41 show the
result of a chisel being too low or too high. Fig.42
and 43. show the chisel positioned correctly on the
tool rest.
- 18-
Fig.38.
Fig.39.
Fig.41.
Fig.43.
Fig.42.
Fig.40.
HANDLE
KICKED
UP
LARGE
DIAMETER
SMALL
DIAMETER
EDGE
DIGGING
IN
NO STOCK
REMOVED
REST TOO DISTANT – CHISEL TOO HIGH,
POINT TOO FAR FROM REST
