Where each $46.04 sale goes
Filament, power, your time $6.81Marketplace fees $4.82Left from this sale $34.41
One sale ties up the printer for about 4.5 hours. $34.41 ÷ 4.5 h = $7.65 per print hour.
At the mid price, if it sells. Shipping not included.
Why it can work
- Old boats have obsolete fittings
- ASA has held up on deck in one owner's report
- Non-load caps and covers are low risk
Why it might fail
- Failure under load can injure crew
- UV and salt degrade printed parts
- Commercial blocks are rated and cost from about $17
Be aware before you sell
Cleat files on Printables and MyMiniFactory exist, but check licences and never imply a load rating you have not tested. Rated high for safety liability, not IP: a failed block or cleat under load can injure crew or lose a boat. Etsy asks for your own original design, so a licensed file may not qualify.
How to get a file you may sell
- Make your own. Tinkercad is free and enough for simple shapes.
- Buy a commercial licence. Many designers on Cults3D, MyMiniFactory and Etsy sell one. Read what it allows.
- Use open licences. CC0 and CC BY allow selling prints. NC does not. Filter by licence on Printables or MakerWorld and keep a screenshot.
Search live listings
More detail
Our take
Safety-critical under load: a Harken 16 mm block is rated at about 250 lb working load, and layer lines are the weak point of any print. Skip anything that carries a line or a person's weight, and only low-load trim such as caps and covers in ASA could work.
How the score adds up
Profit per print hour23/30
Demand6/25
Low competition20/20
Low legal risk0/15
Evidence quality6/10
The score is our estimate from public prices and signals, not sales data. Evidence confidence: medium.
Competition
Harken and Ronstan dominate rated hardware, and printed versions are mostly owner DIY rather than a real market.
We have not confirmed any yet.
Make it your own
- Solve one specific problem better than generic listings
- Test one original design before making more
- Show a real photo and honest measurements
Where to find 3D files
We do not link files for this product because of safety or brand risk.
Demand signals
- Sailboat Owners members discuss what they solved with a printer, including UV failures on pulleys. source
- Good Old Boat covers printing new or replacement parts aboard. source
- Yacht.de reports on spare parts from a professional printing repair service. source
- A Sailing Forums member printed a replacement for a broken plastic cleat. source
Check your own numbersRead the repair and spare parts guide
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