Making Holdfasts work from Joel’s Blog at “Tools for Working Wood”
I have had trouble making my bench holdfasts “hold fast” since I built my Roubo bench a couple of years ago. They tend to slip and no longer grip tight.
After seeing the following blog post from Joel at Tools for Working Wood recently, I finally fixed the problem.
I get a fair number of emails about our holdfasts. People are worried that their bench is either too thick or too thin and they aren’t sure if they will work.
I have two benches. One is 1 7/8″ thick, the other is 3″ thick.The holdfasts work fine in both benches. With much thinner or much thicker benches you might have an issue but in the years selling holdfasts I think we have never had a case where they could not be made to work. Maybe once.
I sanded the holdfast shafts as suggested, but what really fixed my holdfasts was counter-boring an oversize hole on the underside of my bench at a diameter wider than the 3/4″ dog holes and about 1″ deep. Turns out the my over-built Roubo bench with the near 4″ thick top was too thick for the holdfasts to grip. They work great again now.