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Help with purfling?


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On 1/20/2022 at 3:56 PM, HoGo said:

Here is my own version. I made it to try cutting binding ledges on mandolins by hand instead of routing. Worked great. I cut almost all the way with just this tool (set at 1.5mm fromedge). Blade is from old broken bread knife (approx. 1mm thick, I have also another one in case I will do a violin purfling). Body is from walnut and bone and piees of maple. It's got just one wedge holding it together. The other tool is my first attempt from many years ago. I use it in tight spaces around body scroll.IMG_2609.thumb.JPG.8815bf17b1cb0b5cfb419efdbe3deeb1.JPGIMG_2610.thumb.JPG.d67561e1b81f4541756af77ec883c416.JPG

How does it work,,, with one wedge holding it together?

Evan with cramp in greymatter

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9 hours ago, Evan Smith said:

How does it work,,, with one wedge holding it together?

The slot in maple cross bar goes through to the other side and there is tiny spacer between the blade and the "bone" side of the main body that holds the blade at correct distance. The wedge on the opposite side wants to pull the bar through the hole and clamps the blade against the spacer.

I made this just as experiment from whatever pieces of material I had laying around and wanted it simple so the spacer is maple and the wedge tension deformed it a bit when I put it together but I managed to cut two complete F-5 mandolins without need to re-adjust or tighten the wedge at all so it's holding fine. I will replace the spacer with metal when I re-adjust it in the future. The blades are from simple kitchen bread knife 0.8 or 1mm thick.

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On 1/19/2022 at 3:26 AM, uncle duke said:

I'm still using my hardware store circle cutter with the cutter turned backwards and following with an x-acto knife.

Cutting purfling trenches by hand and this winter weather go hand in hand I'm finding out.  Plate three looks better than plate one and the snow depth outside read 3.5.

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On 1/17/2022 at 5:16 AM, Michael Darnton said:

The blades needed to be set to the width of the purfling you were using by turning them flat to flat and shimming them apart to the right width.

Now you need to find whatever fits. Measure and go by that.

Thanks, you have just saved alot of work on my first project.

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