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david

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david last won the day on September 28 2018

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About david

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    Manufacturing tools and watch parts.

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  1. PeteFr2, When I reassemble the spindle assembly I smack the nose cone with a wooden 2x4 to help seat the spindle into the cone bearings. To adjust it I tighten the nut on the back while slowly rotating the spindle by hand until it feels tight. Then I back off the nut about 1/4 of a turn. This is something that has to be done by feel. The spindle needs a microscopic gap to allow it to ride on the lubricating oil The lubricating oil should be the actual bearing. The ideal gap would be the distance of one molecule of oil but the practical distance will have to be slightly larger. I then run the lathe for a short period and check for any heat buildup in the headstock. If it becomes warm it is too tight and the nut needs to be slightly backed off. The last thing I do is check the inside cone runout with a 1/10,000 inch dial indicator. The runout should be around 2/10,000 of an inch. Do not try to go past that or you can damage the lathe. This issue with cone bearings was a limiting factor in precision for hundreds of years. Around the WW2 era Derbyshire finally improved on it when they began producing lathes with ultra precision ball bearings. They were able to achieve a spindle runout of around 50/1,000,000 of an inch. Both Derbyshire and Levin lathes have reduced spindle runout as far as ball bearing spindles will allow. The only way to surpass this is with air bearings or hydrostatic bearings. david
  2. For many years the beer available in the USA was horrible. Times have changed and there are a number of craft breweries that make excellent beer. My area (Atlanta, Ga) has an excellent brew called SWEETWATER ALE. I love beer but had to switch to wine as it tended to make me fat. david
  3. Klassiker, Unhardened drill rod can be purchased off of the interned and is very inexpensive in smaller diameters. One of the problems with threading using a die plate is the lack of quality steel they are made from. A regular commercially made die will do a much better job cutting a thread than a die plate. When you make another one, cut the thread first before investing your time and work machining the rest of it. Make sure that the stock has been turned to the correct diameter before threading. If the diameter is just slightly oversize it will cause problems. david
  4. I had two visits to England back in the 1990s. My favorite brew was THEAKSTONS OLD PECULIER. david
  5. Trigus, Watchmaker screwdriver shafts are skinny for a reason. It is to reduce the force transmitted from your fingers and thumb to the screwdriver tip. The screws used in watches are very tiny and can be easily overpowered and broken.. Trying to use a pin vice could present problems from applying too much torque to the screw, twisting it in half. Breaking a screw off in a watch plate can be a disastrous problem as you may not be able to get the broken piece of screw out of the plate. Most inexpensive watch screwdrivers are usable, especially when starting out. You can start out with a less expensive set and upgrade at a later time.
  6. JDM, That Bergeon model is actually an instrument size lathe which was designed to include clock size parts. It is a bigger and stronger machine than their Geneva style lathe and will reduce machine flex caused from heavier cuts. This is due to the double pedestal bed and the larger size. It will also successfully make watch parts, is extremely expensive and has a designer label brand name. It is not, however, as precise as a Derbyshire or a Levin lathe in the instrument size machine. Due to the cone bearing spindle the rotational speed cannot match a ball bearing headstock. Also, the spindle runout cannot be brought in more than a couple of ten thousandths of an inch or the bearings will be damaged. A ball bearing spindle can have a runout in the millionths of an inch and offer a faster rotation. At one time cone bearing headstocks were more accurate than ball bearing headstocks but with the improvement of ball bearing manufacturing around WW2, ball bearing machines surpassed the accuracy of the cone bearing machines. That said, it is a beautiful looking machine and will certainly do the job for which it was designed. david
  7. Hamish, At some point a person has to conclude that a tool functions adequately for the job or it does not. Selecting a designer label tool seems to be an easy way to select quality but unfortunately things do not always work out that way. Does a SNAP-ON wrench really tighten a bolt better than a CRAFTSMAN wrench? Does a BERGEON case opener open watch cases better than the Chinese case opener? Is a BERGEON watch winder a better tool than the Chinese made watch winder. Is a BERGEON lathe more accurate than a DERBYSHIRE or a LEVIN LATHE? As most people tend to think that a highly advertised Swiss tool with a designer brand name is a superior tool, they will never be happy with actual reality. When the issues are researched it becomes evident that the BERGEON case openers and watch winders are made in China and the DERBYSHIRE and LEVIN lathes are far more accurate than the BERGEON lathe. The BERGEON lathe is manufactured by a company called DIXIE, which is owned by a Japanese company called MORI SEKI. The next question is, Is a BERGEON lathe adequate for watch work? The answer is yes. I own one and it is a fine machine. I also own a Chinese made Sincere lathe and it is also a fine machine. The BERGEON and SINCERE machines have cone bearing spindles and have accuracies limited to that particular bearing system. That said, both machines can make parts with enough precision to be used in a watch. I also have both BERGEON and HOROTEC screwdriver sets. Either type of screwdriver is able to remove watch screws. As long as the screwdriver blades are of good quality the rest is a personal preference. david
  8. JD, Does the watch front have a left handed thread? Try turning it in the opposite direction. david
  9. Rduckwor, I live in Atlanta. Can you supply any additional information? david
  10. PaulnKC, I went through the same thing a number of years ago. The device that worked the best for me was definitely a microscope. Low power loupes have a decent range of focus but as the magnification increases the range of focus decreases. At 20X any head movement will throw the watch movement out of focus. Since the microscope lenses are fixed in a frame, you can examine parts at 40X with no problems. Also, your eyes emit vapor which will fog up the loupe. I would vote for the microscope hands down. david
  11. Phydaux, Welcome to the learning process. I would bet that Mark went through the same experience when he was starting out. After somebody puts in years of study and practice they seem to make the process look easy. In truth, it isn't. As mistakes are made one learns techniques and tricks to avoid repeating them. I cannot count the number of watch parts that I launched into a low earth orbit that evaporated somewhere between the ozone layer and stratosphere. When starting out, expect to break things. Practice on the LEAST expensive movements you can find. In the beginning it doesn't matter if the movements even work. Just famillarize yourself with the components, where they go and how to disassemble, clean, reassemble and lubricate. If you start out with non working movements you will also begin to recognize why the movement failed to work. Anybody who is honest about it will admit going through the same learning experience. Relish mistakes as an important part of the learning process. david
  12. J Berry, You should suggest that your friend moves the tools to your home. david
  13. JD Berry, It looks like you hit the mother load. The tool in the first photo is expensive and almost impossible to find. If you watch this video you can see a similar tool in operation: https://youtu.be/mkGygB7BMsQ The tool in the second photo looks like a set of dies and a holding base. It would be used in conjunction with a press for pressing in watch crystals and backs. The tool in the third photo is a small general use drill press. It is good for drilling applications that do not require a high rate of speed. Extremely tiny drill bits will break if turned too slow. I have a Dumore high speed drill press that turns at around 20,000 rpm and is suitable only for extremely small diameter drill bits. david
  14. Praezis, India gets most of their steel from melting down old ships. The steel used in ship plates contains silicone which makes it great for ship plates but not so great for machining applications.
  15. From your posts it appears that you are familiar with both the one day session and Mark's course. In that case would you advise PHYDAUX to take the one day course for $1245.00 or Mark's course? david
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