Are 3D Printed Gears Viable for Professional Use?

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Discussion Overview

The discussion revolves around the viability of 3D printed gears for professional use, particularly focusing on custom gears and racks. Participants explore various methods of gear production, including traditional machining and 3D printing, while considering the quality and application of these gears in different contexts.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant expresses the need for custom-made gears and seeks recommendations for reliable services in Europe.
  • Others suggest that they have found professional-looking options in Europe, although specifics are not detailed.
  • There is a discussion about the feasibility of cutting gears by hand or using machine tools, with one participant sharing their experience in locksmithing.
  • Another participant mentions using a Barber Colman gear hobbing machine or a milling machine for small quantities of gears.
  • One participant indicates a preference for off-the-shelf parts but is considering 3D printing for future projects due to cost considerations.
  • A question is raised about the viability of 3D printed gears, with one participant noting that small gears may not be suitable for this method.
  • Another participant suggests that the viability of 3D printed gears depends on the type of printer and the intended application, mentioning that sintered-metal units can produce tough parts.
  • Concerns are raised about the finish quality of 3D printed parts, indicating that post-processing may be necessary to achieve desired results.

Areas of Agreement / Disagreement

Participants express differing views on the viability of 3D printed gears, with some supporting the idea under certain conditions while others remain skeptical, particularly regarding the size and application of the gears. The discussion does not reach a consensus on the overall effectiveness of 3D printed gears for professional use.

Contextual Notes

Participants mention specific gear types, ratios, and production methods, but there are limitations in the details provided about the requirements for custom gears and the capabilities of different 3D printing technologies.

Jarfi
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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?
 
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Bookmarked to 'Resources" folder. Thanks, Jack.
 
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.
 
Baluncore said:
I cut my own gears
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.)
 
In a Barber Colman gear hobbing machine, or a milling machine for small quantities.
 
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.
 
Danger said:
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.
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.

Baluncore said:
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.
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.
 
  • #10
Jarfi said:
Are 3d printed gears viable?
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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