Troubleshooting Holdfast Issues

After boring the first few holdfast holes, I realized that I had serious issues.  My holdfasts simply weren’t biting.  Often, they were jumping around in their holes.  I had to find a solution, and fast.

The bench top is 4-1/2 inches thick.  The holdfast holes are 3/4 inch in diameter.  I am using Gramercy holdfasts.  They are very well made, and should survive years of abuse.  I did some research and determined that the most likely cause was the thickness of the bench top.  How could I resolve this with the holes already bored?

I received some excellent advice from my friends on Twitter and decided that I would counter bore the holes from the bottom with a large diameter hole.  To center the holes, I inserted a piece of 3/4 inch dowel.  After some trial and error, I determined that the most effective nominal thickness was around 3 inches.  The holdfasts work beautifully.  The solution was quick and easy.

I need to clean up the surfaces and coat everything in boiled linseed oil.  Then, I will finally be able to start my first project on the Roubo.  Stay tuned

You can find links to my other Roubo posts here:  Project Index

IMG_5420

Holdfast in action

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Roubo Workbench: I Met the Devil…

cutting the shiplap joint

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A close up of the drawbored joints

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Roubo Workbench Build: Leg Tenons the Hybrid Way – Video

Roubo Workbench Build: Tenons

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