Has anybody had luck with these? Mine is this one Model Engineering and engineering tools online from RDG Tools Ltd Home Page (Engineering Tools) Tel 01422 885069 /884605
If the link works, it should show the arrangement of the thing. My issue is that the cam bit doesn't turn enough to lock, however much you try to force it, and it pops off during parting off. Have any of you machining experts had luck in modifying one to actually be useful? It's a lovely bit of kit, all except for the fact that it doesn't work.
The way it works is that the locking post holds a piston arrangement through an eccentric such that when its open there is clearance to lift out the toolholder and change it for a different one. Quickly. Hence the name, I suppose. But the lock position doesn't turn the eccentric all the way round so that the toolholder is clamped by the eccentric being opposite the released position. In fact it doesn't get much more that 100 degrees of rotation and a big force on the tool pops it off. That allows the tool to drop and move towards the chuck, and that causes frustration.
If the link works, it should show the arrangement of the thing. My issue is that the cam bit doesn't turn enough to lock, however much you try to force it, and it pops off during parting off. Have any of you machining experts had luck in modifying one to actually be useful? It's a lovely bit of kit, all except for the fact that it doesn't work.
The way it works is that the locking post holds a piston arrangement through an eccentric such that when its open there is clearance to lift out the toolholder and change it for a different one. Quickly. Hence the name, I suppose. But the lock position doesn't turn the eccentric all the way round so that the toolholder is clamped by the eccentric being opposite the released position. In fact it doesn't get much more that 100 degrees of rotation and a big force on the tool pops it off. That allows the tool to drop and move towards the chuck, and that causes frustration.