ER25 Collet Set w/Ellsworth handle

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ER25 Collet Set w/Ellsworth handle

Robust’s Collet Handle System is a joint development between noted turner David Ellsworth and Robust Tools.  David designed the triangular wooden grip to give comfort and control.  Robust designed the collet system around popular ER series collets.

The Collet Handle System gives turners a way to quickly and confidently change tools utilizing the same handle. With 4 different collet sizes included with each handle size you can easily swap out tools with a twist of your wrist.

But it’s not just tool changing that is important, simply removing the tool for grinding greatly facilitates the use of grinding jigs.  That’s accomplished quick and easy.


Collets: Each system comes equipped with four collets that fit common size round gouge and chisel shafts.  Each collet has a useful range of a little over 1/32”, or about 1mm.   These collets are standard industrial grade collets. Robust stocks the sizes listed below.  Other sizes are readily available from a variety of industrial sources such as and

Handles: The handles are Ash.  The overall length for the ER32 is 20.5″ and for the ER25, 16″

NOTES: If the tool spins in the collet during heavy cuts, try tightening up the collet nut with a gloved hand.

Lightly oil the threads on the collet nut and stem for smooth operation.




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  • 4
    Keeping it fun

    Posted by Matt on 01 30 2017

    I recently purchased about a dozen unhandled lathe tools and I wanted to try several of them out right away in order to prioritize which ones should be fitted with handles first, and to give myself time before needing to make handles for the rest of them. I am primarily into turning bowls these days and doing a big batch of spindle work just seemed daunting. I selected the Robust ER25 collet chuck handle because it looks like it is versatile enough to hold all the tools I purchased, (with shank diameters from 1/4" - 5/8") and because changing the tools would be fast and would not require the use of another tool, such as an allen wrench. Nor would it have a big knob that might get in the way when using the tool or make it uncomfortable to position. I was happy to find that the chuck body is small and non-intrusive, when using the handle near the tool rest, reaching deep inside a large bowl. The handle has a comfortable feel and is about the right length for nearly all the tools I have tried in it, though the ER-32 handle might be the better fit for large bowl gouges. I really like the handle and have yet to try adding some weight to it by pouring shot into the bottom. Since the handle is hollow and because of its triangular shape, it does feel a bit lighter and thinner than most of my other tools, but I didn't find that to be a detractor.