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Type: Posts; User: Michael G

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    316 is used in marine environments, 304 used in...

    316 is used in marine environments, 304 used in more mundane applications. Provided that you are not doing something weird with it (like splashing salty water at it constantly), 304 will probably be...
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    I must admit that it has me intrigued; like Jack...

    I must admit that it has me intrigued; like Jack I was thinking of other things that it might be able to do. The pressure is not much though - 2.5 bar (vs 6+ from a standard compressor). My plasma...
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    Sticky: Friend of mine did something similar - had some...

    Friend of mine did something similar - had some radio headsets but the plastic nut inside had broken along the knit line (they were injection moulded). Could I make some in aluminium (M6x0.75)...
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    This is the critical fold, and where the width of...

    This is the critical fold, and where the width of the folding leaf is important - I assumed 50mm as it was not marked on the sketch
    405401
    It can be folded.
    405400
    Michael
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    Yes.

    Yes.
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    I think you should be able to - depends on the...

    I think you should be able to - depends on the bending leaf thickness (I could do it on mine).

    Michael
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    What size Al do you need (just in case the...

    What size Al do you need (just in case the Tennant Creek branch of Capral is not open when you call in)

    Michael
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    Sticky: Works for me. Maybe make the arm a little longer...

    Works for me. Maybe make the arm a little longer so it can swing forward when needed.

    Michael
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    Actually, brass etching is something I haven't...

    Actually, brass etching is something I haven't done...

    Michael
  10. Nice save - the business end looks fine. ...

    Nice save - the business end looks fine.

    Michael
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    Gee Kryn - I showed that over 2 and a bit years...

    Gee Kryn - I showed that over 2 and a bit years ago... :doh:

    https://youtu.be/hiqyBfpMwuY

    Michael
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    Remember that a test bar will sag under it's own...

    Remember that a test bar will sag under it's own weight.

    Michael
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    Sticky: The bit on the column is just a turned ring and...

    The bit on the column is just a turned ring and you have that piece from the lamp. You should be able to make something up. If that lamp piece is the wrong size there are other ways of getting that...
  14. The stock is only 105 long and less the 25mm...

    The stock is only 105 long and less the 25mm slice, it means there only needs to be 80mm of clear overhead between the blade and where the bow sits (note that the handle can be removed too). An...
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    Try it and see. I was once told that modern...

    Try it and see. I was once told that modern grinding wheels are so well made (in comparision with older efforts) that balancing is rarely needed. How true I'm not sure but (once dressed) you may find...
  16. I think I can do that on my 4" bandsaw. If...

    I think I can do that on my 4" bandsaw. If someone with something bigger shows up, then go with that but if there are no takers I'll have a go.

    Michael
  17. Some of those tools look like brazed carbide -...

    Some of those tools look like brazed carbide - probably would not hurt to stick them in some evaporust, see how they clean up. The rust looks nasty but should clean up and with a bit of a sharpen,...
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    SA Looks a lot like mine Bob, so if you need...

    Looks a lot like mine Bob, so if you need dimensions for the handle, let me know.
    I think there should also be a spring for blade return too.

    Michael
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    Inside an industrial CNC machine

    Steve is an engine maker in the US, specialising in 'drag and drive' engines making 3000 to 5000hp.
    He bought a large HAAS 5 axis horizontal machining centre that he is getting converted to 4 axis...
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    Only if the screw has some sort of stop or brake...

    Only if the screw has some sort of stop or brake on it so that it can't run away. Ball screws are known for doing that so potentially climb milling is more risky :doh:

    Michael
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    It is likely that if the nut has worn, the...

    It is likely that if the nut has worn, the leadscrew has worn too, particularly if like most of us, you don't work all the way across the full travel of the machine all the time. Check by winding to...
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    Given how fine the grit in these stones can be,...

    Given how fine the grit in these stones can be, if it works as advertised, I'm not sure if that would cut anything - more rub/ burnish. Then from Reidy41's post, as soon as you rub them together you...
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    My personal opinion is that precision ground...

    My personal opinion is that precision ground stones are not something I would buy. I could well be wrong, but I can not see any great advantage to them over off the shelf stones, and I use one of...
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    Actually, it is a more common practice not to put...

    Actually, it is a more common practice not to put burrs and dings in there in the first place.:U

    I can't remember the last time I had to stone out a ding on a precision surface. I know there are...
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    It will stain it yellow. Rather than soak, how...

    It will stain it yellow. Rather than soak, how about wrapping the metal bits in paper towel and soaking the towel with Evaporust?

    Michael
  26. For a low resistance, high capacity resistor an...

    For a low resistance, high capacity resistor an electric stove element may be the go. I snagged a few from the bin at the previous place for a vac former I intended to make but one of the guys...
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    With respect to the repeat-o-meter, this thread...

    With respect to the repeat-o-meter, this thread may be of interest.

    https://metalworkforums.com/f65/t178131-testing-hand-surface-plate

    Michael
  28. Thread: SA - Steel

    by Michael G
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    G'day Kryn Yes, the RHS can be Duragal. There is...

    G'day Kryn
    Yes, the RHS can be Duragal. There is a small amount of welding to be done but I can strip the coating locally.
    Next weekend will be fine.
    I had not thought as far as shelving...
  29. Thread: SA - Steel

    by Michael G
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    SA - Steel

    I'm planning an upgrade to my mill accessories cupboard. Before I throw myself on the mercy of the local steel suppliers, does anyone near by have surplus steel they want to get rid of? I'm after

    ...
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    Are you sure it's not what we old buggers call...

    Are you sure it's not what we old buggers call 1/4"? (6.35mm?):roll:

    Michael
  31. To do that sort of thing, I cut the external...

    To do that sort of thing, I cut the external thread first and size it with a thread mic (or wires). Usually I will make the blank slightly smaller, so not much point measuring off the OD. Typically...
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    I have one you can borrow if you wish. What is...

    I have one you can borrow if you wish.
    What is the model of your drill? I am wondering about the health of my drill chuck; it seems to do a wonderful job of galling up the drill bit shanks.
    ...
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    While trying not to give away what I was told in...

    While trying not to give away what I was told in confidence, Grahame has had some family based issues crop up and is concentrating on what is important at the moment.

    Michael
  34. Resistance (spot) welding works by putting stonk...

    Resistance (spot) welding works by putting stonk loads of current through a very small area. When we were welding studs on, they typically had a small projection on them to get the small area. We...
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    SA Yes it has.

    Yes it has.
  36. Thread: Table rock

    by Michael G
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    Personally I cheat - I make 3 legs solid and put...

    Personally I cheat - I make 3 legs solid and put a large bolt as the foot for a 4th. A table can be perfectly flat and still rock if the floor is not flat. It gets worse the better made (more rigid)...
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    If you are set on non-digital, these are a base...

    If you are set on non-digital, these are a base model plan jane set of Mitutoyos that I never use, but they are 8"/ 200mm.

    405020

    So we don't run afoul of the forum rules, PM me if they might...
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    Sticky: I have a grab box of (imperial) tapered pins...

    I have a grab box of (imperial) tapered pins somewhere. If you want one I can have a look for the size you need. How stressed is the joint? If the rest of the joint is tight, and it is more a...
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    Another parallex free set from memory is Brown &...

    Another parallex free set from memory is Brown & Sharpe. The Mitutoyos are not too bad - the angled measuring surface takes out most of it.

    Michael
  40. Thread: Miss Me?

    by Michael G
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    Is that why it went quiet all of a sudden! :U ...

    Is that why it went quiet all of a sudden! :U

    Michael
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    You did not mention what length. I recently got a...

    You did not mention what length. I recently got a nice 600mm pair...



    Another one I use is to adjust to the measurement I want, zero and then I can read the amount to take off diameter directly...
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    I use a Tecalemit gun too on nipples that look...

    I use a Tecalemit gun too on nipples that look exactly like those. The important thing is that the axis of the nipple and the axis of the gun must co-incide, otherwise it will leak rather than go...
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    Newer is relative - it's still older than I am! ...

    Newer is relative - it's still older than I am!

    Michael
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    Really? I've had one for close to 20 years, it's...

    Really? I've had one for close to 20 years, it's the only mill I've ever used in any of my videos; you even have a part I made using it. The last time you visited you were using it as a table surface...
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    Austral is a manufacturer (now Australwright)....

    Austral is a manufacturer (now Australwright). From what I've been able to see, 602 looks like a bearing bronze. Probably phos bronze or gunmetal would subsitute. You could also try phoning...
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    Austenitic stainless steels (300 series) are not...

    Austenitic stainless steels (300 series) are not typically magnetic, although some grades such as 316 will be slightly magnetic. Ferritic stainless steels (400 series) are magnetic and probably some...
  47. Somewhere (don't ask me where) I think there is a...

    Somewhere (don't ask me where) I think there is a requirement that images be 120k or less. 250k may have been pushing a friendship...
    Lots of resizing tools out there.

    Michael
  48. I don't really like them or telescopic gauges as...

    I don't really like them or telescopic gauges as they rely on operator feel; I could never get closer than about 4 thou which for a fit leaves too much variation. Instead I have a sets of pin gauges...
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    Sounds like you are reinventing the percussion...

    Sounds like you are reinventing the percussion mechanism inside an electric hammer drill.

    Michael
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    Before I did my poly-vee conversion, I noted the...

    Before I did my poly-vee conversion, I noted the motor sheeve diameters as 70.9, 99.1 and 125.8. I think they are OD. Not 100% sure but I noted the spindle pulleys as 93.5, 126.5, 154.5 and 183.5 for...
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