tormek SVD-185 Manual de usuario
75
Gouge Jig SVD-185
Grinding direction:
Away from the edge.
Design
The jig comprises a tool holder (1) which runs in a sleeve (2). The tool is aligned with a disc
(4) and tightened with a knob screw (5). There is a washer (6) for wide gouges. The stop ring
(7) can be set for a convex bevel with a screw (8).
The tool holder can be set in any position from 0 to 6 with the 5 mm Allen key (9). The setting
can be noted on a special prole label (10), which is attached to the ferrule. A special pen,
which works on these labels is included (11). For turning cutters there is a shaft (12) with a
mounting screw (13) and a 2,5 mm Allen key (14).
Positioning of Machine
TURNING TOOLS
Bowl gouges
Spindle gouges
Turning cutters
CARVING TOOLS
Curved gouges
Spoon-shaped gouges
Back bent gouges
Down bent gouges
Curved V-tools
Max tool width 25 mm (1").
76
The special locking disc fits any size of tool, which is automatically aligned in the same position
every time it is mounted. The disc can be positioned either along (a) or across (b) the tool. For wide
spindle gouges there is a removable washer, which fits on the disc (c).
Turning Gouges and Carving Tools
You can grind turning gouges with the so called ngernail shape as well as carving gouges
with various shapes. You can also grind straight and curved V-tools.
The jig causes the tool to move towards the grindstone in a special way, according to the set-
ting selected from 0 to 6. This means, that for turning gouges you can decide the maximum
length of the side edges. For curved carving gouges, which are not ground with a ngernail
shape, the jig setting compensates for the shape of the shank.
The jig can be set from 0 to 6,
which permits the grinding of …
… turning gouges with various
lengths of side bevels and …
… carving gouges with various
shapes and V-tools.
The disc also works if placed diagonally.
Section seen from above.
For a large gouge with a short flute the locking disc is
removed. Flatten the top surface of the shank with a file for
repeatable alignment.
abaac
77
Turning Gouges
Note the settings on the Profile
Label and put it in on the ferrule.
Aset of labels comes with the jig.
The protrusion of the
toolinthejig, P.
The setting of the jig, JS. Universal Support position.
Use hole A or hole B.
Shaping
The jig positions the gouge on the grindstone so that you can get a specic and repeatable
grinding at any point along the bevel. This enables you to get an even, single bevel around
the entire prole from the left to the right wing.
With the Turning Tool Setter TTS-100 you control these factors. Select the prole you want
from the chart on the next page and use the three settings, which give that shape. Note the
settings on the Prole Label and put it on the ferrule. After the initial shaping you can exactly
replicate your favourite shape at every sharpening in less than a minute.
These three factors determine the geometry of a gouge
78
These geometries, i.e. the shape and edge, angle are recommended by experienced wood-
turners and recognized woodturning workshops around the world, e.g. Craft Supplies in USA
and Drechselstube Neckarsteinach in Germany.
Since a tool can have an unlimited number of combinations of shapes and edge angles, a
new tool has a more or less a different shape compared to any of the shapes on the chart.
Therefore, you rst need to shape your tool to one of the shapes on this chart. Then the fol-
lowing sharpenings will be an easy task and done in less than a minute.
Tip Stick to the shape you have selected and do not switch from one shape
to another. Then you will get the full benefit of the Tormek TTS-100 Setter,
since you can instantly replicate exactly the same shape every time. Should
you need a different shape, then buy another tool and grind it to your alterna-
tive shape. This way of working will give you more time for turning and fewer
interruptions for shaping and sharpening.
Bowl gouges
1α=45° JS 2
P 65
Hole A
Standard profile.
Only lightly swept back wings.
For turners of all skill levels.
2α=45°
Irish profile. Swept back wings.
Swing the tool 180° from side
to side.
3α=40°
JS 2
P 75
Hole A
With long swept back wings.
Somewhat aggressive.
For professional level turners.
4α=55°
JS 4
P 65
Hole A
The larger edge angle is beneficial
when turning deep bowls.
5α=60°
JS 6
P 75
Hole A
“Ellsworth” shape.
Wings are pronounced convex.
Spindle gouges
1α=30°
JS 2
P 55
Hole B
For tight spots, detail work and
fi nest fi nish.
For professional level turners.
2α=45°
JS 2
P 65
Hole A
Standard profile.
For turners of all skill levels.
Skews
1
Straight edges JS 20°
P 65
Hole B
For tight spots, detail work and
fi nest fi nish.
For professional level turners.
α=30°
2
Straight edges JS 20°
P 55
Hole B
For broad application.
Easier to control than
a 30° edge angle.
α=45°
3
Radius edges JS 30°
P 75
Hole B
For tight spots, detail work and
fi nest fi nish.
For professional level turners.
α=30°
4
Radius edges JS 30°
P 65
Hole B
For broad application.
Easier to control than
a 30° edge angle.
α=45°
Flat
Flat
Flat
Flat
Oval
Oval
Oval
Oval
Selection Chart
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Shaping
You can do the initial shaping either directly on your Tormek or, if a lot of steel needs to
be removed, on a bench grinder using the Tormek Bench Grinder Mounting Set BGM-100
(page 29).
When shaping on the Tormek, contrary to a high speed bench grinder, you need to apply a
high grinding pressure. Therefore, press with your hand or thumb on the tool to increase the
grinding pressure. Grind one side at the time. This is easier since you do not need to swing
the tool from side to side. Finish the grinding with a full swing over the entire bevel. Do not
spend too long on the same spot on the grindstone, as it will leave grooves on the stone.
Instead, grind on new spots so that you use the whole width of the stone.
By this technique the remaining grooves will not be too pronounced. They will reduce with
future grindings of straight edges. If you immediately require a at surface of the stone, you
can true it with the Truing Tool TT-50.
Check your grinding frequently to ensure that the gouge acquires an even shape. Grind more
on the spots where it is needed. Your hands and eyes decide the nal evenness and shape
of the bevel. Remember that once you have created your desired ngernail shape, this can
be kept forever and you will always benet from the time spent on the initial shaping. This
initial shaping needs only to be made once. It takes 10–20 minutes depending on the original
shape of the tool and on how much steel you need to remove.
Make the first rough shaping on one side at the time. Move the tool sideways so you use the whole
width of the stone and avoid creating grooves.
Grind the other side. Again use the whole width of the stone to wear the stone evenly. Check
frequently to ensure that you are grinding evenly. Grind more where it is needed. Decrease the
grinding pressure as you complete the shape and finish the grinding with a full swing over the
entire bevel.
Grind more here
Both wings now
symmetrical
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When the desired shape is achieved, check that the protrusion
has not decreased during the shaping. If so, re-position the
tool to the correct protrusion and then make the final shaping.
By doing so, you will ensure that you exactly replicate the edge
geometry at future sharpenings.
Rounding Off the Heel
Some turners round off the heel of the bevel on bowl gouges and spindle gouges. The jig
is designed so that you can move the tool towards the stone and grind the heel. The heel
can be ground either as a at secondary bevel or rounded off by sliding the jig back and
forth during grinding. If you want a more pronounced rounding off, you move the Universal
Support a little towards the grindstone.
You can round off the heel by
moving the stop ring (4) and
thesleeve (2) backwards.
Press the jig towards the grind-
stone so that the stop ring (4) is
in touch with the sleeve (2).
Moving the Universal Support
closer towards the grindstone
gives you a more pronounced
rounding off.
Full swing.Limited swing.
Length of the Wings
The length of the wings depends on how
wide you swing the tool from side to side.
Shape of the Wings
Watch that you grind on the right spots
on the bevel so the wings become sym-
metrical and slightly convex or straight.
They must never be concave. Convex. Concave. Not suitable!
Note You decide how much grinding takes place on any
one spot and hence the final shape. If the wings tend to
be concave, then grind more on the centre of the edge.
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Sharpening
Once you have created the shape of the edge, it is an easy task to quickly re-sharpen the
tool. The sharpening should be done on your Tormek machine for the best nish and to
ensure that the edge is not overheated. Make the three settings noted on the Prole Label
carefully and you will obtain exactly the same shape every time even when the stone wears
and decreases in diameter.
Set the jig, JS. Mount the tool with
afixed protrusion, P.
Set the Universal Support.
Use hole A or hole B.
Sharpen with a light pressure
and swing the tool from side to
side. Since the shape is exactly
replicated and the edge is just
touched up, the sharpening
takes just 20–30 seconds.
Move the Universal Support to
the honing wheel and make the
same setting with the Setter.
Hone by swinging the tool
from side to side. You now
have an extra fine finish.
Polish the flute and remove
theburr on the Profiled Leather
Honing Wheel LA-120.
Honing
Honing and polishing the bevel and the ute to a ner nish will make the sharpness more
durable. Also, use the Setter and jig for this operation and you are sure that you are honing
to exactly the same shape as the sharpening plus you do not risk rounding off the very tip
of the edge.
These three factors determine the geometry of a gouge
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Other Shapes
You can of course shape your gouge to a different geometry from those provided with the
TTS-100 Setter. This graph shows examples of shapes which you can achieve on a bowl
gouge at various jig settings and edge angles. In each example, the protrusion of the tool in
the jig (P) is 65 mm (2½"). The gouge is swung fully 180º from side to side.
* Geometries achieved with the TTS-100 Setter.
Jig Setting Edge angle
35°
Edge angle
45°
Edge angle
55°
Edge angle
75°
JS 0
JS 1
JS 2
JS 3
JS 4
JS 5
JS 6
*
*
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Loosen and remove the screw
(8) and the tool holder (1).
Insert the shaft (12) into the
sleeve (2). Note: Position the
sleeve according to the picture!
Mount the screw (8). Lock the
shaft with the Allen key (9)
when tightening.
Turning Cutters
Mounting the jig
Cutters with 5 and 6 mm
(
⁄
"–¼") holes are centered on
the first shoulder on the shaft.
Cutters with 4 mm (
⁄
") holes
are centered bythe M4 screw.
Cutters with 8 mm (
⁄
") holes
are centered on the second
shoulder on the shaft.
Use the Allen key (14), which
comes with the jig.
Mounting the cutter
There are various types and sizes of exchangeable
cutters for hollowing and scraping. The holes vary
from 4–8 mm (⁄–⁄"), but due to a shoulder on the
shaft they can all be mounted with the same screw.
The cutters can be sharpened to their existing shape
or to a new shape.
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Colour the bevel with a marker. Set the universal support so
thatthe grindstone touches the entire length of the bevel when
rotating it by hand.
At the right setting the stone
removes the colouring along
the whole length of the bevel.
Setting the edge angle
Rotate the jig all the time during the sharpening so you achieve an
even grinding around the whole circumference. Use only a light
pressure for the best result. Slide the jig sideways on the Univer-
sal Support so the grindstone wears evenly.
Smooth the back on the
machined, flat outside of the
grindstone. Move the cutter in
order to use the whole surface
of the stone.
Sharpening
Tip When smoothing the back of the cutter, hold it towards the grindstone
before you start the machine. This is easier and you do not risk dropping it
into the water trough.
If you want an extra fine surface on the bevel, grade the grind-
stone with the Stone Grader SP-650 so it grinds more finely
corresponding to a 1000 grit grindstone.
Important Do not hone these small tools on the leather honing wheel!
They can easily get caught on the leather surface and spoil the leather.
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