It is even worse than you think. A little Google finds that US Patent 328707 (issued in 1885) covers a swinging tool holder for threading! His design doesn't lock the swinging holder but instead relies on the cutting force to keep it properly bedded. > -----Original Message----- > From: modeleng-bounce@xxxxxxxxxxxxx [mailto:modeleng-bounce@xxxxxxxxxxxxx] > On Behalf Of Shep > Sent: Sunday, November 25, 2007 10:32 AM > To: modeleng@xxxxxxxxxxxxx > Subject: [modeleng] Re: Fw: More on screwcutting > > Goodness me! > > And I thought that this was an original idea which had occurred to me! > Nothing new under the sun....! > > Cheers! Hubert > > ----- Original Message ----- > From: "Patrick Coppens" <develop@xxxxxxxxx> > To: <modeleng@xxxxxxxxxxxxx> > Sent: Sunday, November 25, 2007 3:01 PM > Subject: [modeleng] Re: Fw: More on screwcutting > > > > Shep wrote: > >> Ken Strauss asked me how I intended to secure the suggested hinge > method > >> outlined below. As I said, this is only a proposal - I have never > made > >> one, or indeed, seen one. > >> My first reaction is to have a tapered pin with a knurled head to > secure > >> it in the closed position, or perhaps a hinged clamp. > >> Has anyone seen this idea in practice? What do you chaps think? It > >> has the merit of easy construction and use. > >> > >> Cheers! Hubert > >> > >> ----- Original Message ----- > >> From: Shep > >> To: Modeleng > >> Sent: Sunday, November 25, 2007 11:11 AM > >> Subject: More on screwcutting > >> > >> > >> Hi everyone > >> > >> I have had several requests for pictures of the device I made for my > >> ex-Emco lathe, to facilitate the withdrawal of the tool, when reversing > >> to the beginning of the thread. I have sent these pictures directly > by > >> email. This system is a lot quicker and easier to make, than the > more > >> elegant series of retracting devices. > >> > >> An even more basic device, which I have not made, but which should > >> work,certainly on the finer threads, is to hinge the cradle of the > >> cutting tool, and swing this upwards to clear the thread on reversing. > >> > >> Cheers! Hubert > >> MODEL ENGINEERING DISCUSSION LIST. > >> > >> To UNSUBSCRIBE from this list, send a blank email to, > >> modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the > subject > >> line. > >> > >> > >> > > Hubert/Ken > > > > have a look here, for ideas.... > > http://www.hemingwaykits.com/acatalog/Swing_Tool_Post.html > > > > This has some good drawings, on how to make such a tool post > > > > Patrick > > MODEL ENGINEERING DISCUSSION LIST. > > > > To UNSUBSCRIBE from this list, send a blank email to, > > modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the > subject > > line. > > MODEL ENGINEERING DISCUSSION LIST. > > To UNSUBSCRIBE from this list, send a blank email to, > modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject > line. MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.