3D printer for the maintenance department: what you can print, what you shouldn't, and whether it pays off
The line stops when a plastic bracket, guide or sensor mount breaks. The original part costs tens of euros, but delivery takes several weeks, and sometimes the part is no longer produced. In such situations, more and more company maintenance departments are using a 3D printer. This article covers the practical side: what you can print with one, what is better left alone, what to choose, and how to assess whether it will pay for itself.
What a maintenance department can print
- Brackets and mounts – for sensors, cables, hoses and button boxes.
- Covers, guards, plugs – against dust and dirt, when the original is broken or lost.
- Guides, spacers, supports – lightly loaded mechanical parts.
- Jigs and fixtures ( jigs and fixtures) – part-centring aids, drilling templates, measuring supports.
- Flexible parts in TPU – non-standard gaskets, dampers and protectors (see the article on TPU filament).
- Functional parts in engineering filaments – lightly loaded gears and sliders made from nylon or carbon fibre composites (see the article on CF filaments).
- Organisation aids – tool holders, boxes for small parts, label holders.
- Prototypes – before ordering a metal part, you can check that it fits in form and dimensions.
What is better not to print
- Parts with safety functions – safety devices, lifting equipment, pressure system components. If a failure of the part could injure someone, an original or certified part is required.
- Parts operating at temperatures above what the material can withstand. PLA starts to soften at around 55 °C; higher temperatures need other materials and, in some cases, metal.
- High-load metal parts – shafts, bearing housings, threaded joints that are repeatedly tightened.
- Parts subject to special requirements – food contact, electrical insulation or fire rating. In such cases the material must have the appropriate declaration or certificate, and its suitability must be checked against the specific requirements.
- Parts still covered by equipment warranty – a non-standard part may become a dispute with the manufacturer.
What to choose: printer and materials
| Question | What it means for your choice |
|---|---|
| Which materials will you print? | PLA and PETG print on almost any printer. ABS, ASA and nylon need an enclosed chamber and a higher nozzle temperature. |
| Will you use composites (CF, GF)? | You need a hardened steel or other wear-resistant nozzle – brass wears out quickly. |
| What size are the parts? | Look at the largest typical parts and compare them with the build volume. |
| Who will print? | If several people will use the printer, simple setup, calibration and remote monitoring matter. |
| Where will it stand? | An enclosed chamber and filtration matter if the printer will stand in a room where people work. |
For a more detailed comparison of filaments, see the article "Which filament to choose for spare parts". Don't forget filament storage: nylon and TPU absorb moisture, so a filament dryer and sealed boxes are useful to the maintenance department (more on drying and storage at drying and storage).
How to calculate payback
There is no universal answer – it all depends on how much your downtime costs. A simple way to assess it is to collect the last 6–12 months of cases where you waited for a plastic or simple part, and for each case compare:
- Without a printer: original part price + delivery + downtime cost × waiting time.
- With a printer: filament cost (part mass × filament price per kilogram) + employee time for modelling and printing + downtime while the part is printed.
Add up the difference over a year and compare it with the cost of the printer, accessories and filament stock to see whether the investment pays back. In companies where an hour of downtime costs more than the part itself, just a few avoided waits are often enough.
Include consumables in your costs too: spare build plates, nozzles, a filament dryer. You will find them in the accessories and spare parts category.
How to start
- Make a list of the parts that are most often missing or most often break.
- Select those that do not perform a safety function and work at normal temperatures.
- Choose a material for each and print a test sample.
- Check the fit in the equipment and note the settings (material, infill, walls) so the part can be reproduced next time.
- Keep your 3D models in one place, together with equipment and part numbers.
How to find them on inteq.lt
- You will find printers in the 3D printers category – e.g., Bambu Lab P2S, Bambu Lab H2D; when buying for a company, a VAT invoice is issued.
- Filaments – gijų (filamentų) kategorijoje: PETG, ASA, nailonas, CF kompozitai, TPU.
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