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  1. Replies
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    Here’s the old torch set that’s soon heading to...

    Here’s the old torch set that’s soon heading to its new home.
    It’s “Elga”brand. It was already relatively old when I bought it in 1985, and was still working fine when I last used it around 2004 :)...
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    I guess the term "ownership" gets a bit technical...

    I guess the term "ownership" gets a bit technical - but there's clearly "rental" and "perpetual once off up front payment for the bottle". As you say - some mixed arrangements with that once-off cost...
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    I see you’re in Melbourne, so good chance there...

    I see you’re in Melbourne, so good chance there is a dedicated welding supply place nearby that will let you handle the gear.
    BOC, Migomag, Migwell as well as plenty of independent welding and...
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    I did a lot of oxy-acet welding as a young bloke....

    I did a lot of oxy-acet welding as a young bloke. Just hobby stuff, never welded as a trade.
    I no longer have oxy-acet gear as I simply don't see a need for it. I have oxy-lpg for cutting thicker...
  5. I’m NOT a sparky so can’t give a specific...

    I’m NOT a sparky so can’t give a specific regulation reference, but definitely not kosher in my experience.
    It’s a sub board, should be on its own circuit and the 6mm feed to the shed doesn’t...
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    A decent face mill would make short work of the...

    A decent face mill would make short work of the bulk material removal.

    Steve
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    A thou along the top and basically nothing along...

    A thou along the top and basically nothing along the front face - I'd be over the moon about that!!
    Sort out the tailstock height and start making chips I'd think.

    Steve
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    Trailer axles come up frequently on Facebook...

    Trailer axles come up frequently on Facebook marketplace etc too.

    Forklift tynes are a great source of high quality non-round steel. Pretty sure they are 4140 or similar. Machines beautifully but...
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    I realise you were asking specifically about new...

    I realise you were asking specifically about new steel, but if you want to save a few dollars for smaller diameter stock then keep an eye out for high tensile bolts
    IME they are nice steel to work...
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    Easy!! Slightly too aggressive on the feed/DOC...

    Easy!!
    Slightly too aggressive on the feed/DOC and ping - it just happens :)

    Practically though, there’s probably only the same cross section of material as a 4mm solid endmill - so I’ll cite...
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    Just for interest, no material left in the center...

    Just for interest, no material left in the center a 2 insert 14mm diameter BAP300 tool holder once the pockets are cut.

    Here’s one I broke recently. Something to keep in mind when looking at...
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    Good info Karl. My own observation is that the...

    Good info Karl.

    My own observation is that the recognised brand manufacturers don't typically run the generic (eg APxx) inserts for milling. I've come across a couple of exceptions, but in...
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    Thanks Karl - that pretty much confirms what I...

    Thanks Karl - that pretty much confirms what I thought ie that the cheap ones are crap but a good one will work well.
    IME there is no way known you’ll get that sort of performance out of the eBay...
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    What I meant by "agricultural" was the possible...

    What I meant by "agricultural" was the possible applications in my workshop compared to the higher precision surfaces I understood the stones were originally intended for (like his beautiful vee...
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    I was pretty sure there had been discussion here...

    I was pretty sure there had been discussion here previously about them.
    Finally found the thread - started by JHovel back in 2017 when he made some of his own.
    ...
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    Precision ground flat stones

    I agree Michael, but I think we’re both considering applications that are magnitudes more agricultural than they are actually intended for.

    FWIW - here’s the Robyn Renzetti video I referred to...
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    My understanding of the purpose of grinding them...

    My understanding of the purpose of grinding them is to actually grind the tops of the grit flat, so that they won't cut like a normal stone (and hence won't actually cut the primary surface).
    ...
  18. Back in my youth we used the old nichrome wire...

    Back in my youth we used the old nichrome wire wound radiant heater elements as rheostats for charging motorbike batteries from dumb car battery chargers. Normally to use as spotlighting batteries. ...
  19. I have tried that a few times in the past, but...

    I have tried that a few times in the past, but TBH what normally happens is I get bored watching it, get distracted with something else, forget about it, go inside, then remember in the middle of the...
  20. Thanks John. I generally agree with what...

    Thanks John.

    I generally agree with what you're saying in regards to testing start/cranking batteries.
    I don't see that it applies directly to deep cycle batteries though, where its capacity...
  21. 12v lead-acid battery tester recommendation

    I seem to accumulate a few 12v batteries around the place.
    Cranking batteries, deep cycle ones, traditional wet lead-acid, AGM, VRLA etc and ranging from small 6Ah ones through to about 150Ah. I...
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    I'm definitely not a fan of them. I find them...

    I'm definitely not a fan of them. I find them harsh and noisy, and not very effective for steel. Mill is a 1.8T TOS FNGJ32 so rigidity isn't particularly an issue.
    Possibly its the cheap crap...
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    Turning small extended diameters

    Not my tip - I learned this from Joe Pie on Youtube a few years ago. I've had to use it a couple of times lately so thought I'd share in case anyone doesn't know about it.
    Here's the original video:...
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    I read your original post saying you unscrew it...

    I read your original post saying you unscrew it to put on your rotary table - but didn’t click that you were unscrewing it from the stub.
    I was actually wondering how you were mounting it on the...
  25. Just a quick update... My can of CRC 3-36...

    Just a quick update...

    My can of CRC 3-36 arrived the other day, so I've given the T&C grinder a spray.
    Weird stuff - looks like any other thin oily spray when it goes on, but come back the next...
  26. I think your original reasoning was somewhat...

    I think your original reasoning was somewhat sound, but possibly some mixed/invalid references.

    I haven’t looked at how you might have got the initial thread depth, but referring to this page...
  27. I typically just use diameter minus pitch to get...

    I typically just use diameter minus pitch to get the ID.
    In this case for 30mm x 24TPI, it’s about 1.05mm pitch - so bore the ID 28.95.

    Steve
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    Sometimes trying to tighten a screw can get you...

    Sometimes trying to tighten a screw can get you enough movement to break it loose.
    Another tip is to use a smear of valve grinding paste on the bit. It provides some additional friction -...
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    From what I can find online the minimum radius...

    From what I can find online the minimum radius for internal corners is typically about 0.75mm.
    I know there’s also a general rule that the minimum hole diameter is 1x the material thickness. Not...
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    CNC metal cutting questions

    You can definitely work around the internal corner radius issue depending on which faces/features are critical

    Here’s a quick sketch of a couple of example options for internal radii.
    From left...
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    What thickness material? I’m assuming under...

    What thickness material?
    I’m assuming under about 20mm as that’s about the practical limit of laser IME…

    Steve
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    Nice find Elan. That’s a simple and very useful...

    Nice find Elan. That’s a simple and very useful calculator.
    I got just over 1000psi from a quick calc using 28,29.5 diameters and the default 350/500 MPa strengths for steel (conservative since the...
  33. Beautiful. Like an oversized watch on steroids!! ...

    Beautiful. Like an oversized watch on steroids!!
    I have accumulated a few spare milk bottle fuses - in case you happen to need any.

    FWIW - My Thiel has a clutch pedal on the front that engages...
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    I’d be interested to see how you’re using it with...

    I’d be interested to see how you’re using it with the vice once you’ve got it all together.

    Steve
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    Very good point. I hadn’t picked up on the 2mm...

    Very good point.
    I hadn’t picked up on the 2mm wall thickness

    Steve
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    Is it for the rod end of the cylinder of the eye...

    Is it for the rod end of the cylinder of the eye end?
    I’m assuming the rod end so the force on the end cap will be less as it has the rod through it reducing the effective area the pressure is...
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    Welcome aboard Tom. Unfortunately the old iron...

    Welcome aboard Tom.
    Unfortunately the old iron disease isn’t curable, but plenty of us around for mutual support ;)

    Steve
  38. I can a the chip clearing air pump (my Thiel has...

    I can a the chip clearing air pump (my Thiel has similar but more ancient).
    There are 2 other BIG features that are awesome - but I’m not going to spoil the story ;)

    Steve
  39. Years ago there used to be electronic kit sets...

    Years ago there used to be electronic kit sets that would plug in between the 240v outlet and the load (ie pump in your scenario)
    When there was current flowing to the load it would turn on a...
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    If you’re only threading wood, I’d suggest trying...

    If you’re only threading wood, I’d suggest trying to find a bolt the right size and cut/grind some straight flutes in it to turn it into a rough tap.
    Even better if you can get one that’s high...
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    Either of those motors should work fine on a...

    Either of those motors should work fine on a 220-380v step up VFD like the cheap Ecogoo/Nflixin brand ones.
    Big difference in power between them though - 1hp and 4hp.

    Steve
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    Assuming you meant 19TPI (not 19mm) then that...

    Assuming you meant 19TPI (not 19mm) then that seems correct to me - but easiest way to confirm is to chuck up a bit of stock and run a test pass the check what you actually get using thread pitch...
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    Perhaps the eBay ones are the leftovers that...

    Perhaps the eBay ones are the leftovers that nobody uses…

    Steve
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    Of the 5 boxes I’ve got here, only one of them is...

    Of the 5 boxes I’ve got here, only one of them is set up for what I’d call reverse (ie CW looking from the tailstock)
    That also seems to be logical from the perspective that most threaded parts are...
  45. Gotcha!!! ...

    Gotcha!!!

    https://uploads.tapatalk-cdn.com/20240206/0726df0db95fa4f6daaaa2a38c18d66b.jpg
    https://uploads.tapatalk-cdn.com/20240206/a2d0bb5682517fe6f6dac3a383030bec.jpg

    When installed the...
  46. Progress!! ...

    Progress!!

    https://uploads.tapatalk-cdn.com/20240206/de2e5cd7d05b59e266a0b7e198e2608f.jpg
    https://uploads.tapatalk-cdn.com/20240206/3048d5127f39823357b9e073f3299dc2.jpg


    The blue sleeve will...
  47. Thread: Roller box

    by OxxAndBert
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    I don’t have any for sale, but do have a couple...

    I don’t have any for sale, but do have a couple here if you need detailed measurements or photos etc.

    Steve
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    VIC No problem Josh. Will PM you to arrange. ...

    No problem Josh.
    Will PM you to arrange.

    Steve
  49. The small blue bit is just a plastic cover that...

    The small blue bit is just a plastic cover that goes over the end. Nothing rotates there..

    Steve
  50. Thanks Kryn. I’ve looked but can’t find anything...

    Thanks Kryn. I’ve looked but can’t find anything on these current model ones.
    The older ones had the ratchet on the small end, but these have it under the large blue ring.

    Steve
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