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  1. G

    Making a ceramic burner,

    Material in my soldering board is quite soft, "chalky" in touch - board can be brought to white heat without damage (doesn't like flux though). But i doubt it has catalytic properties like the one you linked Regards Gregor
  2. G

    Making a ceramic burner,

    Is the ceramic soldering board suited (for example https://www.amazon.com/dp/B000OVK3XO/?tag=skimlinks_replacement-20 ) or something special is needed?
  3. G

    What is with the "special" password ?

    Easy to remember password that you use on many websites is what hackers want. They will try to steal password database from any service - just to try every decoded pass and username everywhere else. Sorry that's the world we live in [emoji35] My method to deal with the problem - few often used...
  4. G

    Brass piston and cylinder problem

    Had the same problem with aluminum piston in steel cylinder in low temperature Stirling engine. First try - dry - runs fine, added tiny drop of light oil to "get better compression" - stopped on the spot. During disassembly i felt that something rubs, polished finish on piston was scratched...
  5. G

    milling machine spindle

    I will recommend a book: "Spindles" Harprit Sandhu, available fir example here: http://www.arceurotrade.co.uk/Catalogue/Books.
  6. G

    drilling using lathe

    I used 12mm bit in 3jaw of a 12x7 lathe and piece of aluminium in toolholder (about 120mm long) it worked, but not without problems. For some reason drillbit worked with only one flute (it was brand new, high quality hss bit) and with every revolution pulled and pushed toolslide from side to...
  7. G

    Turning small diameter

    Old CD drives could be interesting too - for example laser travels on pretty precise and straight 3mm rod - AFAIR 60mm long :)
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    Insert Parting Tool

    Hi Vic I use Glanze parting tool with GTN2 inserts on minilathe - and i'm very pleased with it. It's not a "universal" tool - i'm still using hss parting tool for aluminum, brass and soft steel - because hss produces much nicer surface finish and leaves smaller "pimple" at the center. But when...
  9. G

    Machining neodymium magnets

    Hallo Without thier protective coating they will oxidize and loose thier strength. It wont happen within hours but after some weeks or maybe months your magnets will be junk. Gregor
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