You might have seen Spring Tools’ pull-and-strike center punches or nail sets, but interestingly they also make pull-and-strike wood chisels. Like their other tools, varying the distance you pull back the spring varies the amount of striking force delivered to the tool — up to 3500PSI.
Here in the USA, Spring Tools manufacturers the wood chisels from high-grade tool steel and hardens them to keep their edge. They sell four different chisels including a 5/16″ square face chisel, a 1/4″ sweep gauge chisel, a 90° 3/16″ V-parting chisel, and a 5/16″ sweep gouge. They guarantee all four of the chisels for life.
Individually each chisel runs $11, or you can drop $40 for the 4-piece set with a plastic storage case. The prices are listed before shipping costs.
Wood Chisels [Spring Tools]
Wood Chisel Set [Hartville Tool]
Via Amazon [What’s This?]
If you enjoyed this article, please consider sharing it!
6 Responses to Spring Driven Wood Chisels
Leave a Reply to Gary Cancel reply
Toolmonger on Flickr
And they pinch like an Epilator?
3500 psi? Measured how? For how long?
The contact area between a sharp blade and a flat surface would be even higher. The contact area between the striking and struck surface doesn’t really matter.
The 3500 PSI comes from their general page about Spring Tools:
http://www.springtools.com/designandfunction.shtml
The measurement is better suited for something like their nail set — They do not have any data on the force the chisels can produce, if they did it would have to be under very controlled circumstances.
If you tool a sharp blade vertically against a non deforming surface the sharp blade would have very little contact area. The contact area goes up immensely as the blade enters a material like wood because if the wood is now touching the sides of the chisel too. Using the chisel at a low angle, you start off with a higher contact area still.
How can these NOT hurt your hands after prolonged use, unless they have a stupidly light pull. Even so the friction on your fingers pulling them back for every tiny chip is going to give you raw hands.
I agree with Jaxx. It seems like a trigger pull would work a lot better.
It also seems like this would only be useful in tight places, other then that why wouldn’t you just use a normal mallet and chisel.
Why not just use a regular ol’ sharp chisel and a mallet? And a gouge would be sharp enough that you could just push it through the wood without too much effort. Any time I see things like this I wonder if they’re targetting people that are using dull tools.