Hi Fluxcored, I used my Logan lathe to "shape" a six slotted PTO dog clutch for my tractor some years ago, and took about a full day, and worked the lathe something hard, but it worked in heat treated machine steel, and it made the PTO work again. The picture you comment on right above this post is probably the best fast way to get it done right, with no load on the lathe, if you don't want to really do it right, and do the tooling to do it where it should be done, in the shaper designed for the job exactly. With the right tooling, it's a three minute job to put a keyway in a pulley with the shaper, and looking back, I could have spent half the time I did cutting the spline slots, making the tools for my shaper, and then spent twenty minutes getting the dog clutch machined, and still have the tooling to do the other fifteen similar jobs I've had to work around to get done, since then. Even the idea of using the top slide, with the screw removed and a lever added is a great idea I wish I'd seen before I went to work on that clutch dog. Mad Jack