RFQ: Prototype Crank Shaft - QTY 1 - Steel or Stainless
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  1. #1
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    Default RFQ: Prototype - QTY 1 - Steel or Stainless

    I'm working on a personal project that requires a prototype part. Here is a link to the google drive with Solidworks files, Step file, and drawing. Quantity is 1 and material can be any alloy steel or stainless. If you've got a remnant left over that would be perfect. Strength won't be an issue as it's already oversized and mainly built around the other components I already have on hand.

    If you want to add holes or other features to help with fixturing, just let me know I can see if it will work.

    Thanks,
    Jake

    Edit: Changing design and will come back with an updated version that's cheaper/easier to machine.
    Attached Thumbnails Attached Thumbnails d200-002-rev-.jpg  
    Last edited by J Gilles; 06-09-2021 at 10:04 AM.

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    Quote Originally Posted by J Gilles View Post
    I'm working on a personal project that requires a prototype part.
    I'm not going to googledrive but if it's similar to an automotive crank, SCAT in Los Angeles has been doing that for decades, has the equipment and knowledge to do a good job right off the bat.

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    Not really. It's a small crank under 3" long that will mount on a gear motor for a health care application. 3/4" bore with a keyway on the motor side and a 10mm offset boss for a tie rod end.

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    I think the term "crankshaft" in the title may make some think different that what you need here if not paying attention to the print.
    It was the first thing I thought and then.... and
    Bob

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    Quote Originally Posted by CarbideBob View Post
    I think the term "crankshaft" in the title may make some think different that what you need here if not paying attention to the print.
    It was the first thing I thought and then.... and
    Bob
    I guess it's closer to a crank, than a crank shaft. That's just what popped into my head when I first drew it. Updated the title.

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    Quote Originally Posted by J Gilles View Post
    I guess it's closer to a crank, than a crank shaft. That's just what popped into my head when I first drew it. Updated the title.
    I did not download it, but sounds like a weedwacker crank might work ?

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    If you can live with a pressed in crank pin might be doable. If you want it all from one piece it will be expensive.
    Bob

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    Quote Originally Posted by bob View Post
    If you can live with a pressed in crank pin might be doable. If you want it all from one piece it will be expensive.
    Bob
    This is a great suggestion. I might be able to change it to use a 10mm pull out dowel pin and use the threads for retaining the tie rod end.

    I'm going to close this out for now and go back to the drawing board.

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    Quote Originally Posted by J Gilles View Post
    This is a great suggestion. I might be able to change it to use a 10mm pull out dowel pin and use the threads for retaining the tie rod end.

    I'm going to close this out for now and go back to the drawing board.
    I’m not understanding why this would be a difficult part to make. This thing can be made pretty easily as one part and should not be very expensive.


    Sent from my iPhone using Tapatalk

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    Quote Originally Posted by jeffk View Post
    I’m not understanding why this would be a difficult part to make. This thing can be made pretty easily as one part and should not be very expensive.


    Sent from my iPhone using Tapatalk
    No shit. Looking at the drawing that is dirt simple. 2 ops on a VMC and a small keyway broach.

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    Quote Originally Posted by Garwood View Post
    No shit. Looking at the drawing that is dirt simple. 2 ops on a VMC and a small keyway broach.
    Even a four-jaw in an engine lathe with a couple of second-ops .... pretty easy part.

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    So if it's so easy why don't you quote

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    Final update for me.

    Ended up finding a fadal 4020 for a screaming deal, so I'm just going to make this part and the rest for this project myself.

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    Quote Originally Posted by bob View Post
    So if it's so easy why don't you quote
    'cuz there'd be screaming up the wazoo about "china ! china ! china !" For a litle job like this, not worth the grief ...

    Congrats, J Gilles. You needed a vmc anyhow

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    Quote Originally Posted by bob View Post
    So if it's so easy why don't you quote
    Because my shop does not do job work, I make products.

    I happen to make a part very similar to that from aluminum and 303 stainless.

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    Will quote if still interested, send me an email to [email protected]


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