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Just to be clear, the Assembly Workbench is not necessarily needed to produce CNC-ready parts. For something like a CNC mill or router, one will want separate parts that will be individually cut on the CNC. Assembly in the CAD software may be helpful for checking the model, but it does not help...

Welcome to the forum! I have been using FreeCAD for many years, currently using 21.2, not the dev version. Though I have been greatly tempted by the many new features of 22dev / 1.0, I have generally had a better experience waiting until the dev version becomes the release version, so I'm...

FWIW, when I used the spreadsheet I linked above, I entered my desired numbers, then printed it out. No batteries required after that! :)

John, here is the spreadsheet I made years ago. A word of explanation about how it is set up: In the upper left corner, you can enter the diameter of the ball, the amount of crossfeed that you get with one complete revolution of your crossfeed screw, what you want to use as the start setting...

I don't know about being a scholar, but I can attest that Rich is no gentleman! :):):)

Welcome to the forum!

Welcome to the forum!

George, I am so sorry to hear that health issues have caught up with you. Thank you for your tremendous contributions to this craft.

Welcome to the forum!

So sorry to hear of this loss, but rejoice that it was peaceful. Prayers ...

Welcome to the forum!

Exactly. I've done the free-hobbing, many years ago, to make a fine down-feed for my pitiful "Big Red" mill-drill. It worked fairly well, but I did not / would not trust the results to provide a high degree of accuracy. Building a gear-hobbing system (something akin to this: ) is also on my...

Keep in mind that the B&S cutters are a compromise. Yes, you can cut a variety of gears with each cutter, but only one size will be absolutely correct; the rest will be close enough, but not exactly the right shape for the size. For a rack, the correct shape is straight-sided teeth. How can one...

Yes, I've done that before, and have considered that as a possible way to proceed. Will give it more thought when this rises back to the top of the pile. It's been a while since this first happened, but as I recall, there were no parts available; only recourse is to buy a complete new RT...

It has the slant / angle. What it may not have is the curved shape on the sides that is found on higher-quality worm gears. It's too hot to go dig it up in the garage at the moment; I'll try to remember to take a picture next time I'm out there.

As I said: "machining (or possibly purchasing) a new gear" - machining is certainly an option, and yes, I have all of the tooling needed to cut spur gears, and I can cut them at an angle as well. What I don't have ATM is a way to hob the worm gear with a curvature to "wrap around" the worm...

Since there is a section of teeth stripped out of the old gear, it would seem necessary to replace it. Perhaps there is a better way to replace the gear? As I recall, it appears to be machined as part of the table, but perhaps I have missed something.

I prefer to use OpenSCAD for some projects ... but it is a vastly different approach than most or all of the alternatives being discussed above! Things that lend themselves to regular features work well, and a lot of what I work up as 3d models fit into this category - holders / organizers for...

Mine looks to be cast iron, and it is a relatively fine pitch - more or less a module 1, based on the measurements. I've considered machining off the old gear, machining (or possibly purchasing) a new gear, and mating the two ... but I haven't had time to work on it. One of these days ...