JR-ProjectsCustom 3D printing and CAD design
Spare parts, mounts, prototypes and small series. You send a photo, a sketch or a file, I design and print the part in the right material and ship it worldwide.
Parts you cannot buy off the shelf
Recreated from photos and measurements
Broken holders, clips, covers or knobs that are no longer available.
Mounts for car, camper and home
Made for your exact spot, like my cup holder for the Fiat Ducato or the fan mount for roof windows.
Prototypes and small series
From the first functional sample to a small series, with changes between versions.
Printing since 2012
- 2012
During my electrical engineering studies I build my first 3D printer. I design the mechanics, electronics and settings entirely myself.
- The years after
Several self-built printers run side by side for years. That is how you get to know every material and every print failure.
- Today
Modern printers with automatic colour and material changes. That means multicolour parts in a single print.
- Design in Fusion 360 or SolidWorks, with a STEP file for you on request
- I check tolerances, wall thickness and print orientation so the part fits and lasts
- Post-processing and assembly if needed
How many parts are possible?
It depends on the size. That is why I plan quantity and delivery date for every project individually.
Print time: a few hours for a plate of small parts, about a day for one large part
Which material for which part?
The material decides whether a part holds up. Here are the most important ones, and I will help you choose.
| Material | Properties | Typical use |
|---|---|---|
| PLA | Dimensionally stable, clean finish, not heat resistant | Prototypes, models, indoor parts |
| PETG | Tough, slightly flexible, handles mechanical stress | Mounts, functional parts, housings |
| ASA | UV and weather resistant, tolerates heat | Parts for cars, campers and outdoors |
| TPU | Flexible and rubber-like, absorbs shocks | Seals, bumpers, protective covers |
| Nylon | Very tough and wear resistant | Gears, sliding parts, loaded clips |
| ABS | More heat resistant than PLA, easy to finish | Technical parts and housings |
How a print job works
- 01
Send a photo or file
A few photos with a ruler next to the part, the key dimensions or your STL or STEP file.
- 02
Design & check
I design the part and check tolerances, wall thickness and print orientation.
- 03
Quote
Material, price and delivery date in writing. A test print first if needed.
- 04
Print & ship
I print, check the fit and ship the part, also internationally.
Parts I have designed and printed
What buyers say in my Etsy shop
Reviews are quoted in their original German.
„So toll, ich habe 2 Jahre lang danach gesucht, ohne mein Dachfenster austauschen zu müssen!"
„Jan ist super hilfsbereit und hat meine Fragen ausführlich beantwortet. Das Produkt kam schön verpackt bei mir an."
„Super Artikel und top verarbeitet. Nie wieder die Frage: Welches Bier war jetzt meins?"
Questions about 3D printing
Can I get a spare part printed without a 3D file?
Yes. Often a few photos with a ruler or tape measure next to the part and the key dimensions are enough. I then design the part. If you already have an STL or STEP file, it is faster.
Which file formats can I send?
Preferably STL or STEP. Photos, sketches and dimensioned drawings work too, then I design the model myself.
Which material is right for my part?
PLA suits prototypes and indoor parts. PETG handles mechanical stress better. ASA withstands sun and heat, for example in a car or outdoors. TPU is flexible and rubber-like. I advise you if you are unsure.
How many parts can you print?
It depends on the size. Small parts fit by the dozen on one build plate and are done in a few hours. One part the size of the print bed occupies a printer for about a day. Tell me the part and the quantity and I will plan the date.
Do you ship internationally?
Yes, I ship worldwide from Germany. Shipping costs depend on size, weight and destination and are included in the quote.
Tell me about your project
A few sentences are enough. I usually reply within 24 hours, and the first conversation is free.
- You write to meFor parts, ideally with photos and dimensions. For apps, a short description of the idea.
- We have a quick callBy phone or video, in English or German. We clarify what you need and by when.
- You get a quoteIn writing, as a fixed price or based on effort. Take your time to decide.