Making a Carriage stop for a lathe

Greensands.

"This is my answer to a gearbox fitted Myford S7 making use of the tapped hole provided for the oiler. It has provided satsfactory service over many tears."

That boss is for the Locating pin for the Quadrant Plate controlled by the Upper Lever for QCGB selection, not an oiler.

Does your fixing screw for your device still load the locating pin spring below?

Hi KWIL The fitting has been in place for so many years that I had forgotten all about the exact details, Without removing the unit I would have said that the answer to your question is no and certainly there have been any issues with the stop in operation. The strange thing however is that my copy of the Myford Handbook for the S7 Ref No.S723W entitled "Notes on Operation Installation and Maintenance Also Pictorial Parts List" ,- Section: Quick Change Gearbox - pages 50-52 makes (or shows) any mention of the boss to which you refer. The same is also true with my copy of the separate Myford publication No.712U for the QC Gearbox. Do you have any further information for the quadrant plate locating pin?

I have 2 x S7s with QCGB. My details are correct. No mention is made of the boss, but all the parts below are used at that location. Does the quadrant still "latch" when going A - B  C when selecting using the Chromed lever?

Part 193 is the Quadrant Plate

198 is the spring, 199 is the pin which bears on the quadrant. You took out Grubscrew, part 200 to fit your device.

All details on page 51 of S723W

Regards

K

Edited By KWIL on 06/03/2022 19:02:40

Well, all the excellent examples in this thread have shamed me into upgrading my "permanently temporary" stop with the threaded rod and nuts. So have made a plain rod and a GH Thomas style ball handle and brass cotter clamps bring it up to snuff. A bit more forgiving in the event of a crash as pointed out, and looks better than that bright zinc plated hardware store threaded rod. And its much quicker action to set than faffing about with nuts and spanners. So now I can whiz it out of the way to get the oil gun into that leadscrew oiler at the left.

The finished unit

The parts:. Making the ball handle is always an interesting exercise but very satisfying when it's done.

The naff old threaded rod, and the nasty piece of rusted 3/8" bar I had to turn down to 5/16" for the job. Our only steel merchant here does not stock bright mild steel bar under 1/2" and shipping is too costly to buy online so it was out with the moving steady and a big dose of patience. No matter how you set it up, that steady gets in the way, of the tailstock, of the chuck, of the toolpost, of the bolts on top of the toolpost. Eventually turned the first inch or more down to size then set the tool ahead of the steady so the steady followed on the nicely machined surface, not that awful rusty surface ahead of the cut.

Edited By Hopper on 10/03/2022 10:40:15

Edited By Hopper on 10/03/2022 10:42:38

Edited By Hopper on 10/03/2022 10:47:23