The Home Machinist!

Just found out that mine are 16 DP, 14 1/2 PA. Thanks

Is there a particular edition of MH that is good to have? I don't have one. Thnaks very much.

Thanks again for the information. It's getting clearer to me, that I'm in way over my head. At his point I surrender. Defintion of surrender: To drop your arms and join the winning side. A. I'm now looking for a shop to make me a length of this worm or B. find an original replacement part. Thanks fo...

So, if I could set up a timing belt drive from leadscrew to spindle with aux motor driving everything at the hi ratio side, I can do this??

Thanks Glenn and thanks Don. I saw a you tube video of a hand crank made for a SB 9". It slid into the bore at gear end and looked simple to make. On the other hand, I do have a Richmill programable CNC rotary indexer and a Rockwell mill. Hobs are way too expensive and I don't want to make one....

Glenn, thanks for the kinzer site, it is very helpful. My lathe's coarsest setting is 4tpi but in the Popular Mechanics article found on Kinzer, it says to set the gears to the lead not the pitch and the chart on page 1 has leads listed as low as 1 1/2 to get 4 1/2 threads per inch, so it looks like...

Please see photo attached. Now that I've learned enough to make me dangerous, let's have a look at the bushing in which the part I'm trying to make will theoretically fit. do we have a triple threat, I mean thread here?[attachment=0]

It's all good. Thanks for the most recent more encouraginging posts(lodsb). Thanks for all the posts. There is no shoulder on this piece and yes, I have a 3' bed to cut something lest than 3/4" long and now, thanks to this site and everyone's posts will definitely use a center. I will have plen...

As previuosly posted, I've already cut a 5 tpi sample (in aluminum) with the back gear and it looked like slow motion to me. No offense taken, as I have no real abilities here, that's why I'm on this web page. The truth is, I'm just stubborn and a little nutty. If I could buy this I would. Could I b...

Just the type of comment that makes me more determied to do it. Thanks very much.

Ok, so you know what "double start" means. could you explain it to the neophyte please, and thank you.

I've been on a bunch of UK sites but am not sure about that one, have to double check. Here's photo of the rubber casting. When I line up my protractor paralell with the bore, against the outside edge and the arm paralle with the tooth, I get 27 degrees and am assuming that that is my helix angle. T...