Robert Sorby Wobble Chuck archive
Thursday 28 May 2009
Mark Baker gets eccentric with this chuck test
What it isEccentric turning is something that more people are tackling, but many are baulking at the price of some items available to enable such projects to be undertaken. This new Wobble Chuck from Robert Sorby may well provide the solution we are looking for. It is designed around a body that is in two parts which is held in a chuck. The top part sports a screw (a very long one at that) and three holes, which enable you to hold work by three screws or a single one, as the project requires.
There is a grub screw which allows the central screw to be locked in position, and the lower body has two grub screws to lock the top part in a user-chosen position. The meeting faces between the two bodies are canted to allow the top to be rotated, thereby creating a degree of offset/eccentricity to the work.
There is a centralising line to show when the two parts are dead in line, but other than that, the offset chosen is trial and error. I have to say it is quite liberating not to be hide-bound by manufacturer presets and constraints. This is free-form eccentric turning at its best - user driven and applied so everything is unique.