EVERYDAY ENGINEERING FOR ABSOLUTE BEGINNERS

摘要

After all that mentioned previously, the good news is that a 50 to 70+ year old 'Snodgrass Screwmangler' or' Fazackerley Nutcruncher' would have been built with very generous slides; guides; gibs and feed screws. The shafts and mandrels are most likely to be the problems you have as they tended to be a 'free cutting steel' and a bit light in section, not surface hardened 'high tensile alloy steel' like today. The castings will be from very good grades of cast iron and wear will be minimal. The biggest matter in your favour is that as you are rebuilding the machine, you can with care restore it to a slightly higher standard than when it was originally built. My old 'Herbert' 36 inch table Universal Horizontal milling machine is metric calibrated and was made for a dealer in Ulm, Germany about 1930. At some time early in its career the ball races were replaced on the flat belt countershafts. These replacements are marked 'SKF -Schweinfurt'. As far as I know that establishment ceased to exist about 1943 courtesy of the 8th USAAF, the bearings are still perfect and run silently.