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  1. Replies
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    Sticky: Random steel things

    1) Some random steel on a pallet on a nature strip:
    395228
    I'm guessing the blue angle with holes in the middle are supports (feet?) for some racking. The red ones are a strange mystery. I might...
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    You are both CORRECT ! Back in the day, they...

    You are both CORRECT !


    Back in the day, they were called "piston finishers."

    Every little garage had one, and pistons were purchased as semi-finished castings say 30 or 40 thou oversize.
    ...
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    lamestllama is close. It is a sort of grinder....

    lamestllama is close. It is a sort of grinder. Here are today's photos:


    395180 395181 395182

    1st one is a table, which pivots on the two pins at the front of the casting.

    2nd one is the...
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    An unusual Hercus!

    Can anyone guess what this is?
    395168



    It has a large pinion-driven tailstock:
    395169 395170
    that fits an MT3 in its 2" diameter.
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    My business card does mention killer robots:...

    My business card does mention killer robots:
    395163

    so Kryn might have been on the right track?




    but no, Henry is closer. It doesn't get parted off actually used as replacement washer:...
  6. "There is a stinky relationship between me and my...

    "There is a stinky relationship between me and my slitting saws."

    :U

    Tackh!

    (er, Kittos?)
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    I always wondered about these flip up threading...

    I always wondered about these flip up threading tool holders. Haven't made one yet.
    (no reverse on the Hercus, and no big "washing machine pulley"
    spindle handle, for manual cranking, like on...
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    Materials science, ringing, resonance, vibration damping

    ...In a perfect world, I would machine up a new one from a nice block of 4140 steel...




    Diagnostic question: Do we think a tensile steel (like 4140) would "ring" more than mild steel?

    ...
  9. Yes. I tried perforated UniStrut first, but the...

    Yes. I tried perforated UniStrut first, but the holes weren't well spaced.

    The holes in the Ericsson u-bar were just the right spacing to make the M8 threaded bar lock in at 45:
    395118 395119...
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    Mystery 4

    395110 395111 395112 395113

    What is it?




    no, I'm not turning the Hercus into a giant slitting machine :roll:
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    It doesn't look like Mal has Hercus 9 compound...

    It doesn't look like Mal has Hercus 9 compound parts, only Hercus 260,
    and that would be many hundred dollars.


    • Steel does ring. The experts say that either machining complex shapes (think...
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    Karl, funny you should say that. This is the...

    Karl, funny you should say that. This is the diffuser after 3 weeks:

    395094

    (I think a few other people have been using it as a hammer :(()



    You're saying remove it completely, until I...
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    Compound slide improvements?

    I have never been happy with the surface finish from my Hercus 9C.
    It is OK on parallel turning Aluminium, but steel varies a lot.
    As does facing off. Parting off is a crap shoot.



    Ignoring...
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    Hi Russ. Do you have any photos of the bead...

    Hi Russ.

    Do you have any photos of the bead roller?
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    Thanks for those links! "Grind the...

    Thanks for those links!






    "Grind the bottom of the magnetic chuck. Grind so there is approximately .0002 of dish per 6 of chuck length"
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    All valid questions. After the deepest...

    All valid questions.



    After the deepest cut, it was about 510C above ambient.
    Between third and fourth pass, I sprayed the table with water to minimise growth,
    but didn't like the surface...
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    It has two "grease" nipples (column, and cross...

    It has two "grease" nipples (column, and cross slide),
    and had old green/black grease in it that I cleaned out of the dovetails,
    and the cross feed screw's nut.


    The cross slide one has a large...
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    Thanks for the suggestion. I've actually...

    Thanks for the suggestion.


    I've actually never seen a surface grinder with a knee !
    I assume it would be like a BridgePort style mill, where the table elevates?




    Machine is small. A...
  19. True, but some are more sheet-ish than others? ...

    True, but some are more sheet-ish than others?



    1) The ones I think are lowest rated are rolled from sheet that seems 3mm thick
    (but might be 2mm?), and form an incomplete box that is open...
  20. When life brings you bent steel (racking beams)

    Friend of a friend has some assorted bent pallet racking. So we went out to Prestons with an empty ute, and collected several bent Dexion orange beams, some blue upright channels, and a few mesh...
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    Indeed, but I doubt the converse is true? :U ...

    Indeed, but I doubt the converse is true? :U



    The "arc" idea is interesting. I'm sure the longitudinal tracks are worn in the middle (and thus the saddle/work-table rises up at the ends of...
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    Surface grinder weirdness

    A little surface grinder had to get moved out of a neighbour's shop, and to get out, it had to be disassembled; motor+wheel off, worktable off, bearing cages wrapped carefully, cross slide off, two...
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    Groan :no: Give the dog a hammer, and see...

    Groan :no:


    Give the dog a hammer, and see what it can do?
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    Got a cheap oversized collet from here: ...

    Got a cheap oversized collet from here:

    https://www.aliexpress.com/item/32947049504.html



    (which reminds me - I should buy some oversized ones for my ER32 holders, but they aren't cheap:
    ...
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    I also have something similar: 394946 394947...

    I also have something similar:

    394946 394947 394948


    My toolmaker neighbour machined up the holder for me.


    I initially used it for milling slots in a faceplate:
    394949 394950
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    Many things there amused me; First lathe...

    Many things there amused me;


    First lathe operator used 2 "safety features."
    A little bit of cardboard on the back of the toolpost to stop chips flying into his face,
    and a rag to remove the...
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    Gidday Paul. Welcome to the forum. How were...

    Gidday Paul. Welcome to the forum.

    How were you going to do the bellows?

    (e.g. Just buy an existing moulded shape? 3D print frame to attach canvas to?)
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    Hi Alan. I recognise that sort of damage. Here...

    Hi Alan.

    I recognise that sort of damage. Here is my ex-school compound slide:
    394835 394836



    I don't think your slide's damage will impact cutting or parting very much.
  29. 1) Agree. 2) He seemed to be saying the...

    1) Agree.

    2) He seemed to be saying the toolpaths could be shared between users.
    e.g. I create/model/build a toolpath for widget A, and email it to you.

    If you have the exact same tools I use,...
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    Sticky: You want to see slow? Try approximating a ball...

    You want to see slow? Try approximating a ball smoothly with a DRO :roll:
    21mm radius @ 0.5mm step = 66 discrete sets of co-ordinates:
    394707 394708 394709 394710 394711 394712

    My eyes got sore...
  31. www.Maharn (http://maharn.com).com I'm guessing...

    www.Maharn.com
    I'm guessing this will be a while to market.


    0) Not fussed about the tooling aspect. He is saying that the tooling library allows easy swapping/sharing of tool paths to machine a...
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    Sticky: 1) Machining up fake nail heads, because...

    1) Machining up fake nail heads, because blacksmithing them failed:
    394694 394695 394696
    First time grinding a HSS profile cutter!


    2) Sharpening an old circular saw blade:
    394698
    because I...
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    Propane worked, but didn't help

    Grabbed an old expansion burner my Dad used 30 years ago,
    that I'm surprised they still seem to make/sell:
    394686



    and put it in my little forge. It makes a hell of a noise - sounds like a...
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    Old+Flogged is OK. This job is only rough...

    Old+Flogged is OK. This job is only rough turning, so parallelism and surface finish are secondary.



    I know of an old Okuma LB-15 II buried in a warehouse,
    but they are only 60mm in the...
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    https://www.machineryhouse.com.au/2LX5102 ...

    https://www.machineryhouse.com.au/2LX5102

    394684394685
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    Medium size CNC lathe?

    Someone asked me about machining some camshaft blanks. Up to 80mm diameter. There are plenty of machine shops that could handle that,


    ...but was wondering if anyone knows of an old CNC lathe...
  37. Teeny, tiny, boring bar insert. Need designation or supplier for holder

    Not a lathe boring bar, a rotating shaft from a line bore-ing machine:
    394659

    That particular shaft is about 12mm diameter. It has a perpendicular slot, about 4x6mm, which currently has a bit of...
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    He made it even simpler; no air feed required, it...

    He made it even simpler; no air feed required, it now just knocks the feed select lever off:

    https://photos.app.goo.gl/6TcXfLBtSPHFe9XU9

    https://photos.app.goo.gl/HWtK24vkg6yE2MbD7
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    Got a MIG working, and welded some nails on the...

    Got a MIG working, and welded some nails on the back:
    394655

    So that is the simplest 15 of the 200 total nails. This week I will try Propane-ing the forge, to get the steel beyond red.
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    OK. There wasn't much spatter inside the nozzle:...

    OK. There wasn't much spatter inside the nozzle:
    394643
    and checking with a multimeter revealed open circuit between the tip and the neck+sleeve.
    (I had assumed they were one piece of brass, and...
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    Bossweld PowerPro 250 issues

    Never used anything but AC stick (and OxyAcetylene back in my teens).

    I'm about to try some MIG (MAG) with one of these:
    394641
    15A power lead, still got the cover film over the displays,...
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    That would require an anvil, and real...

    That would require an anvil, and real blacksmithing skills, but close.

    Large imitation nail/bolt heads:
    394636
    which are for a pub door.

    Seperate thread here:...
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    Fake large nails

    Took some rusty old 1/8" plate steel and cut into squares:
    394626


    Machined a rough die in the Hercus:
    394625 394631


    Got an assistant to stoke the coals:
    394627 394628 394629
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    Creative responses. I particularly like the...

    Creative responses. I particularly like the thought of a very tall cow :o



    It is actually a poor-man's forge:
    394621 394622 394623


    I was inspired by this photo from somewhere:
    394624
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    Nice fabrication work - I particularly like the...

    Nice fabrication work - I particularly like the neat drawings of the suspension brackets.
    Wonder if they were tooling up to produce a lot of upgraded chassis?

    Also like the deTomaso or Ferrari in...
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    Mystery 3

    394601 394602 394603 394604 394605 394606 394607 394608 394609 394610
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    Yes. Filament devices have serious PTC (positive...

    Yes. Filament devices have serious PTC (positive temperature co-efficient):

    394587

    I think I used several small bulbs in parallel, to match the specified resistance, and so that they barely...
  48. :U I was a computer scientist for 30 years....

    :U


    I was a computer scientist for 30 years. Ended up hating IT and business politics (especially Agile), but I think I still like programming (though not many programming languages). I still see...
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    And, for others who might not be lucky enough to...

    And, for others who might not be lucky enough to have a large/expensive resistor on the shelf,

    try some halogen light bulbs, or an old radiator element mounted in a box !
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    Hi Tony. Welcome to the forums. Interesting...

    Hi Tony. Welcome to the forums.


    Interesting lathe. The saddle seems quite wide for the distance between the bed Vs!

    (sadly, I can't afford another lathe)
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