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Thread: Pretty scrap

  1. #1
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    Default Pretty scrap

    I am starting a thread where you can post a photo of your beautiful scrap. This means, you spent some time making a nice part, but had to toss it in the trash because a critical dimension was wrong. So next time that this happens, take a photo and post it here. Maybe we can learn from your mistake.

    This is my latest:



    I needed some keys that were 14.000mm wide on one side and 12.000mm wide on the other, parallel and centered to within a few microns. So I rough milled a piece of tool steel 150mm (6" long) about 0.2mm oversize, used a slitting saw to make a clearance groove, then ground the four important surfaces. The plan was to then drill and countersink the mounting holes, slice into four keys, harden and temper, and then do the final grinding. Problem is, I ground off 0.2mm too much . The part is exactly 13.832 / 11.832 wide. In the trash bin it goes.

    Lesson learned: even though the part is oversize, watch the $%^& dimensions while grinding!

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    These are all scrap. Is there a particular one you want to know about?

    z.jpg

  3. Likes bhigdog, Oldwrench, DrHook, davehud, ballen and 12 others liked this post
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    Quote Originally Posted by Booze Daily View Post
    These are all scrap. Is there a particular one you want to know about?

    z.jpg
    Figure between 5 and 8 beers a part...

    Yeah, username checks out.

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    Quote Originally Posted by dodgin View Post
    Figure between 5 and 8 beers a part...

    Yeah, username checks out.
    And that's just while I'm programming...

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    I scrap somewhat more frequently than i would like but our shop is purely a one-off prototyping type place. Batches of 10 are big. I actually have an order of 130 custom rollers to make which is huge for us.

    THese 2 were kinda expensive fuckups on my part but it was only stock that was lost, oh well! One is the main hull for a robotic submarine that has been shrunk down 60%..the original was about 100lbs of raw aluminum that becomes 4 pounds. The other is a custom whiskey ice-press with 6 total components to make it look like a space ship.dasfs-2-.jpg

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    Ripped it out of the chuck on the last op.


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    I don't make scrap, only new door stops.

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    Almost all of these are "prototypes", yea um, that's what they are called. Some of these are actually the more desirable lightened versions, of if you prefer the racing variant.


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    Quote Originally Posted by Kyle Smith View Post
    Almost all of these are "prototypes", yea um, that's what they are called. Some of these are actually the more desirable lightened versions, of if you prefer the racing variant.

    Very nice! That looks expensive

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    How 'bout this one for you guys, a UHMW paint canister piston. Absolutely nothing wrong with any of it, I was just installing energizers and thought to myself,

    "Pete, these energizers are a pain in the ass to install."
    "Right you are, Pete. Let's go get some assembly lube."
    "Here's some silicone grease, that's compatible with every material!"
    "Damn, still a pain in the ass to install."
    *recalculating*
    *recalculating*
    *recalculating*
    Dammit this goes in a paint canister.
    Attached Thumbnails Attached Thumbnails piston.jpg  

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    Quote Originally Posted by Booze Daily View Post
    These are all scrap. Is there a particular one you want to know about?

    z.jpg
    Looks like a shrine.

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    Quote Originally Posted by ballen View Post
    I am starting a thread where you can post a photo of your beautiful scrap.
    Do ex-girlfriends qualify?

    Or only ex-wives?

    ??

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    Quote Originally Posted by metalmadness View Post
    Very nice! That looks expensive
    BFD.

    Anybody as would own that many copies of Machinery's handbook and be able to afford to waste the storage space on them has to be steenkin' rich..

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    Quote Originally Posted by Forestgnome View Post
    Looks like a shrine.
    Display shelf to show potential customers.

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    Quote Originally Posted by Booze Daily View Post
    Display shelf to show potential customers.
    You don't tell them the parts are scrap....right? Just extras

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    Development work

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    Quote Originally Posted by Hardplates View Post
    You don't tell them the parts are scrap....right? Just extras
    Actually, no one has ever asked.

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  23. #18
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    Quote Originally Posted by Booze Daily View Post
    Display shelf to show potential customers.
    Fun fact-

    If you add stuff to your friend's "Look what we can make" shelf it really fucks with them.

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    A reminder from my early years in machining about the importance of setting the Z offset.

    20210313_151738.jpg

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  26. #20
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    Quote Originally Posted by kenton View Post
    A reminder from my early years in machining about the importance of setting the Z offset.

    20210313_151738.jpg
    I'm not even mad. I'm impressed.


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