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  1. Replies
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    Cheaper

    A lot of the time I just use a bit of SAE engine oil. It seems to work fine with a sharp tap.
    With a blunt tap - sharpen the tap first.

    On the CNC I use 3:1 kero and olive oil with a pulsed...
  2. Replies
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    Mill motor

    My mill has a 3-phase motor.
    The supplied 3-pole switch was wonky and had to be replaced.
    I did not like any of the readily-available 3-phase switches: either flimsy or overkill.
    So
    I pull a...
  3. Quality

    I have a number of Sutton drill bits. They are hard and sharp, but the tips wobble. The bits seem to have slight curves in them - at least in many of mine.

    I usually buy Dormer jobber and stub...
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    NOT buying anything out of Russia anyhow. ...

    NOT buying anything out of Russia anyhow.

    Cheers
    Roger
  5. Replies
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    Yes, but

    Possibly so, but at least they got the bearings cheap.

    Cheers
    Roger
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    Vw

    Then there was the guy who managed to fit a VW Beetle flat four into a bike frame. Not sure about the gearbox. I forget the rest of the details.

    Cheers
    Roger
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    Yeah, been there too. An area in the Austrian...

    Yeah, been there too.
    An area in the Austrian bank network had an error in their permission table, so that my CC issued in Oz was not valid in that area. I even rang the bank in Oz about it, but...
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    Australian experience

    Overseas bushwalking trip planned from Australia.
    Put $16k into credit card account for safety, two weeks before departure.

    1 week before departure I am rung by the bank's security staff, to...
  9. Cnc

    Well, not quite.
    It ALL depends on how you create your g-code.
    If you are doing it from a CAD model, you will need to go back the start.
    However, if you are an experienced programmer using...
  10. Replies
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    Threads

    Often very pseudo. That is, imperial thread with a pseudo metric dial. It happens.

    Cheers
  11. Replies
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    Tank marking

    Before anyone has an OHS fit - the tank will be clearly marked just in case any eedjet wants to steal it for whatever reason.
    Why should this worry you?
    Think of it as a contribution to...
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    Arbors

    It's not hard to do. I have made several. But there is a little catch to it.
    Your chuck will not be absolutely centred with zero runout. Real life.

    So if you make your arbor just by machining the...
  13. FS, Sydney: heavy transformer and output power supply

    FS: heavy transformer and output power supply
    $40 plus any freight

    This was taken off a functioning CNC machine as more power was needed. The 230 VAC transformer has multiple windings:
    2 off 115...
  14. Um? I am missing something here. Help! (It's...

    Um?
    I am missing something here. Help!
    (It's not the EF collet series per se.)

    Cheers
    Roger
  15. they were better than sliced bread. Anything is...

    they were better than sliced bread.
    Anything is better than sliced white bread!

    On the CNC lathe I use gang tooling, all preset. That way I don't have to swap tools all the time.
    392666
    (the...
  16. Qctp

    My lathe came with a rocker, but I soon swapped a QCTP in place. Never looked back.
    So I bought a second QCTP, for the CNC lathe. Guess what: The tool holders are not strictly compatible between the...
  17. You can't

    Well, that won't work! You need the opposite: a light oil would be a start.


    There is only one way: do not put them there in the first place. Nothing else works.

    First of all, that steel looks...
  18. Replies
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    yes, but

    I agree that trying to use a CNC for a strictly one-off job is a debatable proposition, but there are plenty of exceptions.

    On a manual lathe I can machine happily to 0.1 mm, in one direction. The...
  19. Replies
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    Filter

    When a pipe breaks in our street it lets enough grit into the pipes so that washer replacement (grit gets embedded in the washer) becomes more like every 6-12 weeks until the stuff finally gets...
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    If you get this far you should have an idea of...

    If you get this far you should have an idea of what is causing the fault. If you don't have to disturb the backlash gears and can clean the grit it would be the easiest solution.
    Thank you Steve....
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    Where's the problem?

    Is there a problem with replacing a tap washer once every 6 - 12 months? Takes me just a few minutes.

    I see Bunnings has some O-ring tap washers as well. You can NOT over-tighten these. Well, I...
  22. Replies
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    Iscar

    Iscar do an aluminium carbide endmill pack (6, 8, 10 and 12mm I think) that's so cheap we don't even bother re-grinding them.

    Thank you, I will have a look. Remember I am on a retired hobbyist...
  23. Replies
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    Well, it's complex. First of all, I was...

    Well, it's complex.

    First of all, I was talking about drill bits, not milling cutters. HSS drill bits just seem sharper and tougher than carbide. I have trashed a few small carbide bits drilling...
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    Various points

    Some things I have noticed over the years:

    Drill sets are usually cheap rubbish.

    If the point of the drill is not dead centre, the hole will be oversize except at the break-through. (I have had...
  25. Replies
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    Could be a resonance: check the tightness of the...

    Could be a resonance: check the tightness of the bearings in their mounts.

    Cheers
    Roger
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    And the first thing they do (around here anyhow)...

    And the first thing they do (around here anyhow) is to acquire a couple of large dogs and let them roam free. Then they are most upset when their dogs are legally shot on someone else's property as...
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    Ok so buy in an old suburb or a small acreage...

    Ok so buy in an old suburb or a small acreage $60k+ to build shed, council 7 neighbours who demand we buy more locally halt the process becasuse it doesn't fit their lifestyle!

    Buy old farm...
  28. Replies
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    each slot being a different length... Oops! Oh...

    each slot being a different length...
    Oops!
    Oh well, CNC with a single slitting saw, multiple cuts. It's just g-code ...

    Cheers
    Roger
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    Bore out pulley. Not hard, and pulleys are cheap....

    Bore out pulley. Not hard, and pulleys are cheap.
    Mounting the pulley so it is centred is key. Use existing hole as a guide.

    Cheers
    Roger
  30. Replies
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    Dear me. Where did that come from??? But yes, if...

    Dear me. Where did that come from???
    But yes, if it is undersize you can handle that. In fact, I often prefer to do it that way, after micing the cutter carefully.

    Cheers
    Roger
  31. Replies
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    A stack of slitting saws of the required...

    A stack of slitting saws of the required thickness, with spacers between them.
    Low revs - you approximate the speed of a hacksaw blade. Low feed rate to match.
    The oil is to wash the swarf away,...
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    There have been many reports of imported...

    There have been many reports of imported materials which don't measure up to spec, and for the life of me I can't see why our government permits this sort of thing to continue. I really believe...
  33. Thread: CNC Lathe

    by rcaffin
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    3,237

    Or

    Or use some sheet lead and some (thin) BluTack. Yes, that does work.

    Cheers
    Roger
  34. Replies
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    Dust

    Sydney - humidity. Sawdust and 'other' dust holds moisture.
    So I cover both the lathe and the mill bed with light plastic sheeting. Stuff accumulates on top of the plastic. No condensation...
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    Vacuum

    Whether the joint lines are visible or not is one thing, but the vacuum seal on the inserted plug has no dependence on camera resolution.

    Cheers
    Roger
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    Floor

    Certainly not on my barn floor: 100 yr old fly-ash 'concrete'!

    Cheers
    Roger
  37. Replies
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    Impressive

    Very impressive.
    But I wonder what the price of the machine is? Not a hobby machine at all!

    Cheers
    Roger
  38. Replies
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    4-Jaw

    Looks very much like my 4-jaw, off a little H&F Chinese lathe.
    I managed to cut a matching thread in steel to make a dog system.

    What thread does the Hercus use?

    Cheers
    Roger
    EDIT: My little...
  39. Replies
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    Chatter?

    The 1st pic looks like chatter to me. The 2nd pic is just weird.
    I would want to check for any play or flex in the table or the spindle.

    Cheers
    Roger
  40. Thread: Moore & Wright

    by rcaffin
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    8,322

    ? ? ? ? ? ? ? ? It's a gauge, not a cutting...

    ? ? ? ? ? ? ? ?
    It's a gauge, not a cutting tool.

    Cheers
    Roger
  41. Thread: Moore & Wright

    by rcaffin
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    8,322

    Flipped?

    Seems to me that there may be TWO problems here.
    * The first is the accuracy of the angles. Without access to the hardware I cannot comment on that. Jiggle the line fitting and the results might be...
  42. Thread: Moore & Wright

    by rcaffin
    Replies
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    Photos?

    Any chance of posting the photos?
    For our education.

    Cheers
    Roger
  43. Thread: Moore & Wright

    by rcaffin
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    Well, if I got them some 40 years ago, and they...

    Well, if I got them some 40 years ago, and they were possibly 20 years older than that, I think we could safely assume they were genuine. :)

    Modern stuff? Like the M&W stuff quoted earlier? Oh,...
  44. Thread: Moore & Wright

    by rcaffin
    Replies
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    Old & new

    Which may be why I am still using some 20 - 40 yr old UK/USA metrology gear. It seems to hold its calibration. My two 'old' Mitutoyo mics (Japanese) are also good.

    On the other hand, I did buy two...
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    Speedbores

    Speedbores - yeah, that's them. I especially like the version with the little pointy tips out at the corners.

    My B&D with 2 gears runs at 900 RPM on low gear: and goes through almost anything.
    ...
  46. Replies
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    I have a 40 yr old B&D corded drill with cast...

    I have a 40 yr old B&D corded drill with cast aluminium body and 2 speeds (by gears). Made before they went plastic. I have a smaller Makita corded drill as well. Both get used extensively on the...
  47. Thread: Moore & Wright

    by rcaffin
    Replies
    26
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    8,322

    Two classes

    My experience has been that there are three classes or cultures in China.
    * The first is the old State-run factory, where they don't have much/any QC and will only sell to you in container lots....
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    servicing

    It seems to me, about 18 microns backlash in the ballscrew is OK for a turret mill X-axis.
    Depends on what you want from the machine. My system resolution is 0.8 um, and I routinely zero it to 10...
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    A different view

    In my experience of servicing ball nuts, you cannot get a zero backlash result from a single ball screw nut. It isn't possible, and you should not even try. A slight temperature change and you will...
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    Poll: Cost of time!

    I do make some specialised things for my main hobby and I sell them internationally. The cost of the materials is only a small fraction of the sale cost, so that looks like a huge profit - until you...
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