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  1. #1
    Join Date
    Nov 2008
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    Perth WA
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    Default Tentative Turning - Modifications to a Chinese Indicator Stand

    Whilst my shed is not a homage to Chinese industry I will admit I do own some Chinese tools, a bandsaw, a handful of collet chucks and their collets, a couple of toolholders and two 19 dollar mini magnetic indicator stands. A couple of weeks ago I picked up a nice Compac magnetic stand. Not much more than a small pot magnet with a pair of arms attached. What endeared me to this little stand was its ease of use. No buttons to push or levers to turn to disengage the magnet. Simply tilting the magnet enables its release. The only down side of the Compac is its inability ( at present )to hold DTIs by their dovetails.

    So this morning I had a closer look at one of the 19 buck jobbies. My plan was to mount the articulated arm on a beater Eclipse magnet I've had laying around for years. Eclipse supply their pot magnets tapped M6. The Chinese arm mounting screw was 3/16". The hex at the base of the ball was smaller than the ball. I thought of setting it in a vice and either using a drill or mill to drill the 5mm tapping hole. Then I found a plastic grinding wheel centre sleeve that was a neat fit over the ball. Seemed like a good idea that would enable holding in a 3 jaw. Didn't work. The risk was snapping the insert which cost me half as much as the entire stand.

    Brass shim worked. Held the ball, mar free, well enough to enable turning off the 3/16" thread ( left on to aid in centring with the tailstock rather than being hacksawed off ). drilling and starting the thread .

    A 6mm socket set screw installed in the magnet and the job was done.

    I decided to dismantle both of the mag bases, neither of which functioned particularly well, the reason for the transplant. The donor stand base internals were crudely finished in contrast to the other base which featured a more sophisticated and complex design. After removing swarf from within both bases the crude version outperforms its comrade in smoothness of operation.

    These things aren't Nogas but for the outlay they aren't too bad, especially after a clean.

    BT
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  3. #2
    Join Date
    May 2011
    Location
    Murray Bridge SA
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    Default

    Thanks for the instructions BT, great idea.
    Kryn

  4. #3
    Join Date
    Nov 2008
    Location
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    Default

    Not instructions Kryn but a caution.

    The circular spring clip retaining the ball end is positioned to stop at each side of the cutaway in the housing. If you have the desire to pull one of these things to bits, you need to slide the clip around in its groove until one end of the clip is exposed in the opening to allow plier access. Place some cardboard against the body to prevent scratching and with a pair of needle nose pliers the clip can squeezed inwards and removed. Now you are wondering about the caution. It's when the clip springs out of the pliers and into, in my case, the midden. Fortunately the music was off and I could hear where it landed. Music on and the other stand would have become a donor.

    Bob.

  5. #4
    Join Date
    Oct 2010
    Location
    Perth
    Posts
    90

    Default

    I was under the impression that if you remove the central magnet from the base it stuffs up their magnetism. Is this not the case?

  6. #5
    Join Date
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    It has not had any adverse effect on these two bases Marty. The crude looking one was actually improved. Previously it had a gravel like lack of smoothness in its operation.

    BT

  7. #6
    Join Date
    May 2010
    Location
    Lower Lakes SA
    Age
    58
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    2,557

    Default

    Bob I had the plastic knob version of that stand but despite a fair bit of faffing about could never get both ball joints to tighten evenly. One would always be a bit flaccid. It donated its dovetail clamp to an even cheaper permanent magnet holder - the blue one with the double knuckle. I find those surprisingly effective.

    Anyway, neatly done. Either you got lucky or the differences between the two versions of the red one are more than cosmetic.

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