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Type: Posts; User: Michael G

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  1. I originally thought pattern maker's scale too,...

    I originally thought pattern maker's scale too, but as several have pointed out, the difference in graduations make that impractical. The vertical mounting makes me think a scale on the side of a...
  2. The torque the mill will need will be controlled...

    The torque the mill will need will be controlled by DOC, although for stainless you need to be careful with that too. I suspect that limit is there because of spindle speed - To bore in SS at 180mm...
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    Sticky: Oh dear - Does this mean that I might have gone a...

    Oh dear - Does this mean that I might have gone a bit too far?:o






    I'll surround the cupboard it lives in with anti-worming paste - that should distract them...

    Michael
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    Sticky: The worst part was trying to hold the thing while...

    The worst part was trying to hold the thing while welding. Once the first tube was on it was so much easier (well, relatively) to clamp down and get an earth.

    Michael
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    Old welding helmet parts

    Last week a new helmet came home with me, so my Miller elite helmet should go.

    The helmet is old - I think the electronics are probably e-waste as they can be a bit erratic and for occasional...
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    Sticky: Finished my welding helmet stand today. The new...

    Finished my welding helmet stand today. The new helmet hasn't got the typical strap arrangement that they usually have so I made up an ellipical form to be a similar size to the top of a head. It's...
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    Welcome to the forum A bit of heat may help...

    Welcome to the forum
    A bit of heat may help along with the WD-40.

    If you change your location, you might find a member nearby who could visit (bringing a large hammer or something) to assist in...
  8. I hope it was this one...

    I hope it was this one :Uhttps://www.youtube.com/watch?v=oUVxstNNwyY

    Michael
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    Last week a new Optrel* came home with me. Not...

    Last week a new Optrel* came home with me. Not sure what to do with the Elite - I think the electronics are probably e-waste as they can be a bit erratic and for occasional use I don't fancy buying...
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    It would be great if the zinc was applied onto...

    It would be great if the zinc was applied onto bare metal before the rust took hold. If not, all you are doing is trapping the rust underneath the zinc (if it sticks)



    There is generally a...
  11. The colouration is oxide. To not allow it to form...

    The colouration is oxide. To not allow it to form you either have to remove the heat from the process (for example, shears as others have suggested) or remove the oxygen.
    Angle grinders rely on...
  12. What speed and tool type (carbide/ HSS) were you...

    What speed and tool type (carbide/ HSS) were you using?

    Michael
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    Sticky: Probably not so critical on a bandsaw, and...

    Probably not so critical on a bandsaw, and certainly your equipment, your preference applies, but the directive at one employer I worked at was to have E-stops mounted at knee height or similar, just...
  14. The white powdery stuff is from the flux I think....

    The white powdery stuff is from the flux I think.
    This may help.
    https://www.dtwd.wa.gov.au/sites/default/files/teachingproducts/ENG722_CCBY.PDF

    Michael
  15. The first weld you show appears to have voids in...

    The first weld you show appears to have voids in it, the waves in it are long and it is not smooth. I would suggest that you were travelling too fast and possibly the current was too high.
    The...
  16. So if I understand you correctly, you produced a...

    So if I understand you correctly, you produced a poor quality weld with one type of rod, used another with a poor technique, found it harder to use and are now suggesting that the rod you produced...
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    Typically stonk loads of current, 1 or 2V ...

    Typically stonk loads of current, 1 or 2V

    Michael
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    We had a machine like this at work with a similar...

    We had a machine like this at work with a similar looking tray. Turned out that during operation the tray would be flooded with oil that would then trickle down through various holes directly onto...
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    One of these? 393793 I have one of these boring...

    One of these?
    393793
    I have one of these boring bars from General tools. The tip I have in it is for ACME threads (and the bolt in the front is a ring-in), but you could use one of these with a...
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    Got a picture? I have a carbide chamfer cutter...

    Got a picture? I have a carbide chamfer cutter that I use for inside and have ground up some HSS for outside use - could probably sort something out for you.

    Michael
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    For total loss it won't matter. If you only run...

    For total loss it won't matter. If you only run coolant occasionally, consider cutting oil that you can dab on with a brush. Water based coolants are great in certain situations but occasional use in...
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    MM, this post has a link to dropbox and a copy of...

    MM, this post has a link to dropbox and a copy of some hercus docs if interested.
    https://metalworkforums.com/f189/t137514-manual-hercus-lathe/latest/post1954799#post1954799

    Michael
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    I have the necessary M1.25 cutters. I could cut...

    I have the necessary M1.25 cutters. I could cut some if I knew the bore etc.

    Michael
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    I think it is more the latter and not much of the...

    I think it is more the latter and not much of the former.:C

    In all these cases I'm thinking of the root ball as a fucrum and the trees as lever arms. You could do a little practical experiment...
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    If the centre of mass is at 12m and your rope at...

    If the centre of mass is at 12m and your rope at 10m, then you would be lifting 12/10 of the mass (that is, the horizontal component of the 5t mass). If your tree was at 135 degrees, my basic maths...
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    In terms of cutting speeds, at one end 60rpm...

    In terms of cutting speeds, at one end 60rpm represents a 75mm HSS fly cutter on Cast Iron (probably also a useful speed if using a tapping head or larger hole saws), at the other 4000rpm is the...
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    It depends on where the centre of mass of the...

    It depends on where the centre of mass of the tree is. If it is where you have tied your rope, the horizontal component of the weight is all on the rope. Above or below, it's in proportion (distance...
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    I worked in a place that made motors once, and...

    I worked in a place that made motors once, and the answer to whether you can press the shaft out is 'it depends...'

    If it were mine I would get the motor repaired, keep the speed change and use a...
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    One looks to be a stub form gear - where the top...

    One looks to be a stub form gear - where the top of the tooth basically is not there, done for strength purposes. Nothing to worry about I think.

    Michael
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    I agree with Ash - that is an odd one. As DSG are...

    I agree with Ash - that is an odd one. As DSG are English and the lathe old rich in experience, I suspect it is more likely to be DP -30DP is M0.85 (for comparison, 32DP is M0.79).

    Michael
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    Steel does have a grain - it may be that you...

    Steel does have a grain - it may be that you getting some of that coming through from the original hot rolling (bit like damascus steel but not as uniform)

    Michael
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    Tried that one too...:no: Michael

    Tried that one too...:no:

    Michael
  33. Are you still chasing one? One of the guys at...

    Are you still chasing one? One of the guys at work is having a clearout and mentioned that he has one surplus to requirements. No details yet, but soon to be available.

    Michael
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    You know, the problem with extractors like that...

    You know, the problem with extractors like that is that I never break big taps. It's always the small ones, and sometimes even spiral flute.:C

    Michael
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    Depends on the size, but I was thinking about...

    Depends on the size, but I was thinking about milling it from a complete piece of steel. What people forget about welding is that it is an edge joint. While good welds are usually pretty strong in a...
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    Welcome to the forum TIG welding would be the...

    Welcome to the forum

    TIG welding would be the way to go, start with lots of tacks and then fill in the gaps - there will be some distortion though but a skilled welder should be able to minimise...
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    How much warm, moist (combustion products) air is...

    How much warm, moist (combustion products) air is it going to pump into a space filled with poor, cold defenseless cast iron machines?

    Michael
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    Start/ delta connections on large motors are one...

    Start/ delta connections on large motors are one of the things that are done to limit starting current. Starts in delta and then switches to star at some pre-determined time I think. 6 wires because...
  39. If you are fixated by using a winch, why not...

    If you are fixated by using a winch, why not attach it to a post in the back yard somewhere and just pull the boat up. (Or attach the winch to a demountable bracket on the back of the trailer and...
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    I haven't got one (I was a toss up between a DS&G...

    I haven't got one (I was a toss up between a DS&G and CVA - CVA popped up first), but I'm wondering whether that disc is some sort of selector as well, and which way it is pointing selects the...
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    And here's me thinking that the solution was...

    And here's me thinking that the solution was going to be that you've finally gotten hold of the right steadies for the Takisawa to turn bigger work.:doh:

    Michael
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    As long as there are not complaints about swarf...

    As long as there are not complaints about swarf from the shaper landing in the bed.

    Michael
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    Hard to pick a join, but I think I see what you...

    Hard to pick a join, but I think I see what you mean now. :B
    Most of the work is in the bit that you haven't got anyway...

    Michael
  44. The main thing that costs to replace on a SG is...

    The main thing that costs to replace on a SG is the mag chuck. I think I paid around that for mine (about a similar size), so I'd say that's a good price. I'd be tempted to buy it for a friend except...
  45. I have some you could borrow, but I'd want them...

    I have some you could borrow, but I'd want them back in a month or so.

    Michael
  46. Thread: small mill

    by Michael G
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    Bigger is nicer, simily because you have more...

    Bigger is nicer, simily because you have more power at your disposal and they should be a bit more rigid. Model engineers have done amazing work on small machines but why make it harder than it needs...
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    That piece does not look anywhere as substantial...

    That piece does not look anywhere as substantial as the piece you have in the initial pictures - not even sure it is for the same machine. Check what it is made of - I did a bandsaw repair a year or...
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    I'll have to take your word for it, but 1300m/min...

    I'll have to take your word for it, but 1300m/min by my calculation is something like 80km/hour...

    Michael
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    Are you sure about that? - that seems...

    Are you sure about that? - that seems ridiculously fast. Wood is cut at around the same speed as Al, so I would expect around 100 to 150m/min off the top of my head.
    If you have a digital tacho, try...
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    Bob, what's the size of that screw on the seat...

    Bob, what's the size of that screw on the seat motor? I have a couple of people wanting a worm/ worm gear set, so I'm thinking wormyness again*. If I know what the thread is, I maybe able to cut a...
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