Can you promote in r/3dprinting?
/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.
The short answer
Participate genuinely answering questions, disclose your affiliation when relevant, avoid direct sales pitches, use the Monthly Purchase Advice thread for purchase guidance, and follow the self-promotion frequency and linking rules.
What works here
- Answer technical questions and help troubleshoot
- Share relevant projects or models occasionally with disclosure
- Post free models (respect 14-day rule) and paid models (30-day rule) per cooldown
- Use the Monthly Purchase Advice Thread for printer-buying questions
What gets posts removed
- Posting direct solicitations or ads in main feed
- Frequent self-promotion exceeding ~10% of activity
- Giving purchase recommendations outside the stickied megathread
- Linking to restricted websites or using link shorteners to bypass rules
Where this comes from
View the current official rules on RedditSelf-Promotion limits
Subreddit enforces 'Less than 10% Self Promotion' and cooldowns (14 days for free models, 30 days for paid models).
Purchase advice location
Requests for purchase advice must be posted in the stickied Monthly Purchase Advice Thread.
Topical requirement
All posts must be 3D-printing-related, so vendor content must be directly relevant to 3D printing.
Restricted links
Posting links to restricted websites is prohibited and there is a maintained list of restricted sites.
Content restrictions & behavior
Community behavior rules and bans on malicious content mean promotional posts should not violate other policies.
Official rules of r/3dprinting
- 01Posts must be 3D-printing-related
- 02Requests for purchase advice must go in the stickied megathread
- 03Self-Promotion
- 04No Dangerous or Malicious Devices or Instructions
- 05Community Behavior
- 06Specific Day-Limited content
- 07Other content restrictions
- 08No Karma/Repost Bots
- 09No Linking to Restricted Websites
Based on the community’s official rules, analyzed July 27, 2026. Rules change; the official rules page is always the source of truth.
Read the Intoru research and correction methodology.
Intoru follows these rules for you.
It finds people in r/3dprinting and hundreds of other communities who are looking for what you sell, and drafts replies that fit each community’s rules, so you help first and never read as spam.
Find your buyers on Reddit