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Reddit rules index · read 2026-10-07

Can you promote on r/3Dprinting?

Only in a dedicated thread Its rules send self-promotion to a dedicated thread, such as a weekly or pinned one. Promotion outside it is removed.

Bots or automated accounts not allowed Its rules remove posts or comments from bots or automated accounts. Post and reply yourself here. Other communities' AI rules.

What this page is

This page quotes r/3Dprinting's rules as ThreadFox read them on 2026-10-07. The quoted text is the community's; the verdict above is our reading of it. Conditions often decide whether a post fits (a required thread, flair, posting day, account age or karma), and r/3Dprinting's current rules on Reddit always win over this page.

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/r/3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.

What its rules say about promotion

Self-Promotion
Self-Promotion content can only be posted 14 days for free models and 30 days for paid models after your last self-promotion post. Specific other restrictions also apply, that you can read about in the full rules below. This is an overview. Full rules: https://www.reddit.com/r/3Dprinting/wiki/communityrules/

What its rules say about AI and bots

Other content restrictions
Specific other content is also restricted, for example (but not limited to): - Anything regarding cryptocurrency / NFT - AI generated content or models - Reddit ToS restricted content This is an overview. Read the full rules here: https://www.reddit.com/r/3Dprinting/wiki/communityrules/
No Karma/Repost Bots
This one is pretty obvious but we have to add it as a rule to get the applicable report reason for users so they can report Karma Bots reposting other people's content better and we can discern these posts faster.
All 9 rules of r/3Dprinting
  1. Posts must be 3D-printing-related
    All posts must be about a 3D printer, something that is 3D printed, or the 3D Printing industry. This is an overview. Read the full rules here: https://www.reddit.com/r/3Dprinting/wiki/communityrules/
  2. Requests for purchase advice must go in the stickied megathread
    - Don't make new threads when asking what printer to buy, they will be removed. - Instead use the Monthly Purchase Advice Thread that is stickied to the [top of the subreddit](https://old.reddit.com/r/3Dprinting/hot/) This is an overview. Read the full rules here: https://www.reddit.com/r/3Dprinting/wiki/communityrules/
  3. Self-Promotion
    Self-Promotion content can only be posted 14 days for free models and 30 days for paid models after your last self-promotion post. Specific other restrictions also apply, that you can read about in the full rules below. This is an overview. Full rules: https://www.reddit.com/r/3Dprinting/wiki/communityrules/
  4. No Dangerous or Malicious Devices or Instructions
    No Dangerous or Malicious Devices or Instructions: No posting, sharing, or linking to files or designs for dangerous devices (e.g., firearms, explosives). Non-functional cosplay or toy weapons are allowed if not resembling real firearms. Do not provide instructions to create dangerous devices. Ethical discussions are allowed, but no specific instructions. This is an overview. Full rules: https://www.reddit.com/r/3Dprinting/wiki/communityrules/
  5. Community Behavior
    People have off days. Jerks will be ignored and down-voted. But if someone is continually being disruptive to the community in multiple threads (aka trolling), they will be banned at the mods' discretion. This includes bypassing blocked links or services via for example link shorteners, which is against Reddits Terms of Service to begin with. This is an overview. Read the full rules here: https://www.reddit.com/r/3Dprinting/wiki/communityrules/
  6. Specific Day-Limited content
    We only allow memes to be posted here on mondays, as we end up with too many and they drown out all other discussions. Showing off first layers is only permitted on First Layer Friday, Spaghetti only on Spaghetti Saturday. Both of these topics get spammed way too often otherwise and are too repetitive in nature. This is an overview. Read the full rules here: https://www.reddit.com/r/3Dprinting/wiki/communityrules/
  7. Other content restrictions
    Specific other content is also restricted, for example (but not limited to): - Anything regarding cryptocurrency / NFT - AI generated content or models - Reddit ToS restricted content This is an overview. Read the full rules here: https://www.reddit.com/r/3Dprinting/wiki/communityrules/
  8. No Karma/Repost Bots
    This one is pretty obvious but we have to add it as a rule to get the applicable report reason for users so they can report Karma Bots reposting other people's content better and we can discern these posts faster.
  9. No Linking to Restricted Websites
    Do not post links to restricted websites or attempt to circumvent this restriction with partial URL strings, the use of subtle hints, etc., to reference models from these sites. For transparency, a [list of restricted sites](https://www.reddit.com/r/3Dprinting/wiki/communityrules/restrictedwebsites/) is available, explaining why these sites are restricted.

What the written rules don't show

  • Unpublished minimums. Many communities remove posts from new or low-karma accounts through AutoModerator settings that are not on the rules page, often before a moderator sees them.
  • Reddit's own filters. Reddit's site-wide spam filters can remove posts from accounts that mostly share links to their own site, in any community.
  • The community's norms. Many communities see themselves as peers, not an audience: post where you already take part, and make the post worth reading without the link.

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The verdict is our reading of r/3Dprinting's rule text on 2026-10-07. Rules change and moderators decide: read the current rules before you post. Not affiliated with Reddit or r/3Dprinting.

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