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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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    WRT Addict

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    Manufacturing tools and watch parts.

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  1. Lately I have been drinking Manhattans. Two shots of Sweet Vermouth, two shots of Old Overholt Rye Whiskey, a few drops of Angostura Bitters and one Maraschino cherry; tasty stuff. david
  2. I pulled this off of the internet: An India Stone is made from the man-made abrasive aluminum oxide. The term India Stone is a trade name for Norton's Aluminum Oxide sharpening stones. Norton's India stones are orange, tan or brown in color. This distinguishes them from Norton's Crystolon (silicon carbide) Stones which are gray in color.
  3. I use waterstones to sharpen woodworking tools such as various cutters and chisels. They are unsurpassed in this application as they are made from a softer material, designed to wear quickly, and will put a mirror finish on a chisel blade. This however is not the goal when shaping a screwdriver tip. Old Hippy is correct in selecting an extremely hard oil stone such as an Arkansas stone. The purpose is to shape the screwdriver tip with the stone, not the stone with the screwdriver tip. david
  4. Marc, Lophroaig Islay Scotch is a wonderful tasting single malt Scotch. I have tried a lot of them and it is far and away my favorite. david
  5. Both MSC and McMaster Carr have an international sales base. There should be a way to purchase material from them almost anywhere in the world. I was not aware that Kasenit hardening power was no longer available. I checked the internet and numerous other suppliers offer a similar product that should be available from MSC or McMaster Carr. These companies also supply drill rod. One case hardening technique I used in the past was to put the part and Kasenit powder into a crucible and heat everything together. The Kasenit would melt into a cherry red liquid along with the part. I then quenched the part in water. Experiment and see what happens. david
  6. Klassiker, The questions you asked are great questions and questions that should be asked. First off, annealing can be a long precision process. Most watchmakers have come up with various home grown methods over many years. There are some videos by Steffen Pahlow where he anneals material with an alcohol lamp. It has been awhile since I have watched it but I believe he encased the part with some brass tubing and heated everything with the lamp. I have a computer controlled kiln that can reduce temperature in controlled increments over time. The kiln was expensive and is probably not on the wish list of most watchmakers. The main concept is to reduce the temperature slowly, in steps, over a long time period. Most watchmakers do not have hardness testing equipment but you will certainly know if the material is "soft" when you machine it. Drill rod is a generic term for small diameter shaft material that has been ground on a centerless grinder. It is generally offered in Inch, letter and number diameters in relitavely short (3 foot) lengths. It is usually offered in oil hardening (O1,O2), water hardening (W1,W2), and air hardening (A1,A2) steels. The O,W and A designators refer to the chemical composition of the steels. It also implies that the steel is to be hardened by quenching in oil, water or air. Since air quenching has the least amount of temperature differential, it produces the least amount of distoration and cracking in the quenching process. It is used a lot in high precision applications such as stamping dies. Water hardening tool steels are far less expensive then the oil and air hardening steels and are used in lower precision applications such as knives and scissors. For some reason the W composition of drill rod has become the favorite for watch staffs. david
  7. Measure Twice, 12L14 is also called leaded stock and is generally used to make turned shafts. It machines beautifully and leaves a nice finish but it is almost impossible to weld. It can be hardened.
  8. 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
  9. 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
  10. 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
  11. I had two visits to England back in the 1990s. My favorite brew was THEAKSTONS OLD PECULIER. david
  12. 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.
  13. 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
  14. 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
  15. JD, Does the watch front have a left handed thread? Try turning it in the opposite direction. david
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