Cutting Coves (Concaves)

to keep the extreme point of gouge doing

This is the most difficult single cut to mas-

the cutting from start to finish. Reverse

ter - but one of the most important in good

movements to cut the opposite side.

wood turning. First, use pencil marks to

Coves also can be scraped to finish,

indicate the edges. Then, rough it out - to

using the round nose chisel or a rattail file

within about 1/8-in. of the desired finish

- but these methods do not generally pro-

surface - by scraping with the gouge or

duce perfectly curved coves.

 

round nose chisel. If the cove is to be very

 

 

Pencil Marks

 

 

wide, sizing cuts can be made to plot the

 

 

 

 

 

 

 

 

 

roughing out. Once it is roughed out, the

 

 

 

 

 

cove can be finished in two cuts - one

 

 

 

 

 

from each side to the bottom center.

 

 

 

 

 

At the start of either cut, gouge is held

 

 

 

 

 

with handle high and the two sides of

 

1

 

 

blade held between the thumb and fore-

 

 

 

 

 

 

 

 

finger of tool-rest hand, just behind the

2

3

 

4

bevel.Position the fingers ready to roll the

 

 

 

 

 

blade into cove. Hold blade so that bevel

 

is at a 90° angle to the work axis, with

 

point touching the pencil line and pointed

 

into work axis.

Cutting Coves

From this start, depress point slightly to

 

start cut, then continue to move point

 

down in an arc toward the bottom center

 

of cove-at the same time rolling chisel uni-

 

formly so that, at the end of the cut, it will

 

be flat at bottom of the cove. The object is

 

 

 

Making Long Convex Cuts

 

First turn work down to approximate size, using sizing cuts (as required) to deter- mine various diameters. Finish cut can then be made with either skew or gouge.

If the skew is used, the principles of the operation are the same as those employed in cutting a bead - except that curve is longer and may be irregular. Use the extreme heel throughout - start at longer end of curve (if curve is irregular) and progress toward steeper end. If gouge is used, make cut in the same direction. Start with the handle well back of point-swinging handle in the direction of

tool travel to overtake the point, if neces- sary, when the steep part of the curve is reached. Object is to keep extreme point during the cutting throughout - with bevel as tangent to curve as possible.

Chisel Inclined

in Direction of Cut

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RIDGID WL1200LS1 manual Cutting Coves Concaves, Pencil Marks, Making Long Convex Cuts, Chisel Inclined Direction of Cut