Roubo Turning Saw Prototype II

The conceptual foundation of this saw is the ability to rotate the saw blade within the saw frame.  When noodling the design and fabricating this hardware element I considered many options before settling on something nearly identical to Roubo’s.

I ordered a variety of of sizes and configurations of eyebolts from McMaster-Carr to play with.

The eye large enough to accommodate or incorporate the 1/2″ cylindrical rod for affixing the blade was simply too huge for the proportion to work properly.  The eye of the correct proportion was made for a threaded rod way too small for the 1/2″ wide blade.  In the end I took that smaller eye and drilled and tapped it for the cylinder rod of the right size.

I split the eye bolt with my jeweler’s saw and a #10 blade.  I then drilled the cross-holes through which the blade could be attached to this split rod.

One of the last things I did before assembling the whole saw was to de-zinc the hardware parts by soaking them in a citric acid solution (about 2 tsp/pint of water).  As soon as the mild acid began to work on the zinc the solution got cloudy.  I had to monitor the progress and removed the hardware when I had gone far enough.

I assembled everything to make sure it fit but I did not give the saw a test drive since I did not have the saw blade that would be used for it.

I disassembled it and shipped it off to Wisconsin.  I cannot wait to get a production prototype back to give it workout.