Delta 46-715 Manual De Instrucciones página 12

TOOL REST POSITION
Mount the tool rest in place about 1/8" away from the work
and 1/8" above the work centerline (Fig. 32.) This position may
vary to suit both you and the work. Place a guide mark on the
tool rest shank as an aid to quick and accurate resetting.
Clamp the tool rest firmly before operating
the lathe.
ROUGHING A CYLINDER
The large gouge is used in the first turning operation by
smoothing the sharp corners of the work. Run the lathe at
low speed and hold the gouge in the manner shown in Fig.
33 The cut starts about 2 inches from the tailstock end and
continues from this point to the end of the tailstock. Make the
second pass beginning about 2" or 3" to the left of the first
cut. Advance again toward the tailstock, and merge with the
previous cut. Toward the end of the live center, roll the gouge
in the opposite direction (Fig. 34) to carry the final cut off the
live center end of the work. The roughing cut should not be
carried out with one continuous movement, because this
would tear long slivers from the corners of the work. Neither
should the cut be started directly at the end of the stock for the
same reason. You can safely carry the cut from the center of
the stock toward and off either end once the first roughing cuts
have been made.
The position of the gouge involves two or three important
angles. (1) Advance the tool along the work either from right
to left or from left to right. Left to right (from headstock to
tailstock) is preferred since this action throws chips clear of the
operator. (2) Roll the gouge over slightly in the same direction
that it is advancing. (3) Hold the tool well up on the work, with
the bevel to the revolving surface (Fig. 35). This position will
give a clean shearing cut. When pushed straight into the work
(Fig. 35), the gouge has a scraping action, (normally a poor
practice in spindle turning). Continue the roughing cut until
the work approaches 1/8" of the required diameter. Once a
cylindrical form has been obtained, you can change the turning
speed to the second or third speed setting.
NOTE: Continue to move the tool rest inward toward the work
piece to keep the safe distance between the two.
POSITION OF HANDS
While turning, the hand that holds the tool handle should be
in a natural position. This hand provides the leverage for the
tool by either moving in toward the workpiece or moving out.
The position of the tool rest hand is more a matter of individual
preference, rather than a "set" or "proper" position. However,
a palm-up grip (Fig. 36) is generally considered best. In this
position, the first finger acts as a guide, sliding along the tool
rest as the cut is made. The alternate position is a palm-down
grip (Fig. 37). In this position, the heel of the hand or the little
finger serves as a guide. The palm-down position is solid
and positive – excellent for roughing or heavy cutting. Most
beginners start with the palm-down grip, switching later to the
palm-up position for better manipulation of the chisel.
Fig. 32
Fig. 36
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Fig. 33
Fig. 34
Fig. 35
Fig. 37