David mentioned in his article that this system was based on that of the EXE lathe which originated the method and which first became available during the 1920's. I was particularly impressed with the screwcutting system employed which featured the single tooth dog clutch on the headstock mandrel to ensure perfect pick up of the thread being cut every time even at high speed and without stopping the machine, except when checking progress. I remember reading about this in the article by David Urwick in ME No 3480 January 1974 (a copy of which I still have) and thinking that there could not be a more versatile machine available for the model engineer. I am pleased that you have decided to make the readership aware of the very excellent Metal Master Machine Tool in the February issue. He was granted a patent on a swing-clear toolholder, which is another solution to speeding up screwcutting.Äownload a PDF version of Martin Cleeve's article here. Martin Cleeve (a pen-name of Keneth Hart) was a recognised authority on screwcutting in the lathe.
0 Comments
Leave a Reply. |