Fabricating the Frame
A turning saw, often
likened to a miniature bow saw, shares similarities with a coping saw but
boasts a larger frame typically around 12 inches in size. Tools for Working
Wood offers a turning saw of exceptional quality for approximately $180,
slightly beyond my intended budget. However, they generously furnish both the
components and comprehensive blueprints for constructing one's own saw, a
project well-suited for most woodworking enthusiasts. Accompanying the parts
and plans is a detailed set of construction notes, facilitating the process
significantly.
To commence the
project, I procured a set of pins and three blades from TFWW, intending to
fashion my own handles owing to the presence of a lathe in my workshop. The
plans, when printed on legal-size paper with scaling disabled, yield accurately
dimensioned templates. These templates, including those for the cheeks and
stretcher, necessitate adherence to straight-grained stock due to the
substantial stress these components endure. Once the templates are affixed to
the chosen stock using an Elmer's glue stick, they serve as guides for cutting.
Any residual adhesive can be easily eliminated with a wipe of mineral spirits,
especially since sanding the wood is a subsequent step in the finishing
process.
Minor deviations in
the cutouts, as encountered in my own work, need not cause undue concern given
the forgiving nature of the design. While alignment of the pinholes is
desirable, the overall precision required is minimal, given the primary
function of the saw—to provide blade tension and support during cutting
operations. Any discrepancies can be remedied through carving or sanding
adjustments during subsequent stages of assembly.
In the next phase,
these roughed-out components will be transformed into finished parts, including
the creation of knobs and a winding toggle.
Assembling the
Turning Saw: Completing the Construction
Following the
shaping of the frame components, attention turned to the fabrication of the
handles and the winding toggle, depicted in the accompanying image.
Regrettably, photographing the process while utilizing power tools, including
the lathe, proved cumbersome, necessitating a descriptive narrative in lieu of
visual documentation.
The toggle begins as
a ½” diameter cylinder, easily fashioned from offcuts derived from the saw
material. After rounding the ends and forming a cove near one extremity to
accommodate the tensioning strings and allow for pivoting under tension, the
toggle is completed by flattening the opposite end into a paddle shape.
Multiple methods exist for achieving this, but I opted for expediency,
utilizing a stationary belt sander for a swift process lasting a mere 60
seconds.
Similarly, the
handles, fashioned from walnut for their durability, were swiftly fashioned on
the lathe. A ¼” hole bored into one end accommodates the blade pin, while the
handle's simplistic form lends itself to a straightforward turning exercise,
with precision being of secondary importance. After the completion of
both handles, the blade pins are securely affixed in place using a slow-setting
epoxy, ensuring a robust bond. Any excess epoxy is carefully managed, as the
pins are pressed into position, exploiting the grooved design to facilitate
adhesion.

For the finishing
touch, a diluted boiled linseed oil is applied in two coats, providing both
protection and aesthetic enhancement. With the components prepared, final
assembly entails inserting the stretcher into the mortises and affixing the
blade to the pins, akin to a coping saw. Following the recommended stringing
method—utilizing 20lb (or stronger) braided fishing line—the toggle is employed to tension
the blade, with personal discretion guiding the extent of tension applied. The string/line is also available on the parts link above, but I had a fishing rod that used the braided line.
Acknowledging the
subjective nature of tension requirements, experimentation and familiarity with
the saw's nuances are recommended. As I acquaint myself with its operation, I
intend to refine my understanding of optimal tension levels and share insights
gained from practical experience. In conclusion, embarking on this endeavor
proves to be both enjoyable and rewarding, offering a cost-effective solution
to one's sawing needs.