Hub for sprocket (feat. My First Core Box)

Discussion in 'Sand Casting' started by Funkster, Sep 30, 2018.

  1. Funkster

    Funkster Silver

    Hallo folks,

    Tales of joy from the shed this weekend as (spoiler alert) I made a successful attempt at casting a sprocket hub using a silicate-bound core for the central bore.

    Here's the design for the pattern:
    everything_1.png everything_2.png
    The pattern is split in two and they are attached by a piece of M10 all-thread (not shown) that's stuck into the drag part:
    everything_3.png

    And the design for the core box:
    coreinbox_2.png
    The core box as made:
    coreboxparts.jpg
    And my first ever sodium silicate core!
    core.jpg

    core_in_mould.jpg

    The casting came out just fine - I had a few crumbly edges when I pulled the pattern, but nothing that affected performance:
    casting.jpg corehole.jpg
    And here's the finished part doing its job:
    finished_assembly.jpg


    There's a video in case that's the kind of thing you're into.


    I took inspiration for the pouring cup, sprue and riser from olfoundryman's videos - props to him if he's here!

    ttfn,
    --
    Olly
     
    Rtsquirrel and Mark's castings like this.
  2. DavidF

    DavidF Administrator Staff Member Banner Member

    Very well done Olly :D
     
    Funkster likes this.
  3. PatJ

    PatJ Silver

    That is a surprisingly small runout, all things considered (such as no lathe or drill press).
    Quite a successful piece.
    Interesting way to gas a core too.

    Cool!
     
    Funkster likes this.
  4. Funkster

    Funkster Silver

    I probably just got lucky with the runout. In my mind the tapered ends on the core were aligning it perfectly with the print in the mould, but I'm sure the sand didn't get that memo! :)
     
  5. Melterskelter

    Melterskelter Gold Banner Member

    Remarkably accurate casting!

    And your video is first rate.

    Well done all around.

    Denis
     
    Funkster likes this.
  6. Funkster

    Funkster Silver

    Thank you :D
     
  7. Tobho Mott

    Tobho Mott Gold Banner Member

    Cocaine and single malt whiskey mix to make CO2?! Nobody told me this hobby was gonna be so expensive! :D

    Nice burninations, good job!

    Jeff
     
    Funkster likes this.
  8. Funkster

    Funkster Silver

    I'm glad someone else here knows of Trogdor :)
     
  9. Tobho Mott

    Tobho Mott Gold Banner Member

    My own furnace, Balerion the Black Dread, also is named after a dragon.

    I know a little of Trogdor the Burninator, but really only by reputation. ie. Enough to recognize the name, but that is about it.

    Jeff
     

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