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Finding custom gears online

  1. Dec 6, 2014 #1
    I am looking for a very specific sort of gears. And I know they don't exist in any stock so I am convinced I need them custom made, googling gears really just gives me sloppy results. I'm not finding any professional-looking websites. They look sketchy or boring at best, definitely off-putting.

    Is there any high-quality, easy to use and reliable website/corp/service in europe that makes custom racks and bevel gears on demand?
     
  2. jcsd
  3. Dec 6, 2014 #2

    jack action

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  4. Dec 6, 2014 #3
  5. Dec 6, 2014 #4

    Danger

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    Bookmarked to 'Resources" folder. Thanks, Jack.
     
  6. Dec 7, 2014 #5

    Baluncore

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    Why not describe the gears and racks you want. While I prefer to buy stock gears, I cut my own gears when needed. I can usually find what I need.
     
  7. Dec 7, 2014 #6

    Danger

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    Really? By hand or machine tools? That's not a facetious question. In my locksmithing career, I made most of my keys by hand with a file and eyeballing it. They had to be accurate to within .001". (Well, factory tolerance for a Schlage pin-tumbler unit is .002", but my pride wouldn't let me be that sloppy.) I was always far too timid to attempt gears or screws, though. (I did them on a lathe in shop class back in high-school, and even that was annoying.)
     
  8. Dec 7, 2014 #7

    Baluncore

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    In a Barber Colman gear hobbing machine, or a milling machine for small quantities.
     
  9. Dec 7, 2014 #8

    Danger

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    Oh, yeah... I think I saw that on eBay or something when I was snooping around for a cheap Unimat-type lathe. It looked pretty cool. I have no need of one though, because of my approach to design. I work with what I have, so I never need custom parts. (Well, that might change now that I've gotten into some seriously heavy-duty stuff, but I'm still trying to go "off-the-shelf".) I've decided not to bother with the lathe, though... I'm holding out for a 3D printer, which is actually cheaper.
     
  10. Dec 7, 2014 #9
    Are 3d printed gears viable? I've actually considered making some 3d printed gear for the prototype, but the gears are small, 20mm pitch diameter so I bailed on that one.

    I'm afraid bevel gears in 1:8 ratio are rare. I googled something but the ratio is so big that the bigger one is close to being just a rack. Also the "rack/bevel" gear is not circular, but has around 62 degrees of a circle.
     
  11. Dec 7, 2014 #10

    Danger

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    Depends upon both the printer and the application. As far as I know, a "sintered-metal" unit can output parts that approach the toughness of tool steel. Something made by a regular plastic shaper such as a RepRap will handle anything that any other plastic gear would be used for, such as in a VCR (remember those?) or RC model or kitchen blender.

    edit: Oh, one thing though... These things do not come out "clean". You have to file and/or sand them to get rid of aberrations.
     
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