<p>I need to print a rotor for a DC motor I'm designing. In the process of testing the behaviors of the motor performances, I would need a material that will not deform at a temperature range between 100 °C to 150 °C.</p>
<p>Since I don't have a 3D printer yet, I would like to know what would be the best choice for my need.
I was planning to buy an Ender 3, but I'm not sure this entry-level 3D printer will allow me to obtain the results I'm looking for. I'm excluding PLA material because I think it's the most &quot;fragile&quot; material from this point of view and for my needs.</p>
<p>My questions are:</p>
<ol>
<li>Which material should I use in order to have a 3D printed object (rotor) that will not deform at a temperature that varies from 100 °C to 150 °C?</li>
<li>Can an Ender 3 (planning to use full metal hotend and also hotbed) be used to print the filament that is heat resistant? Should I buy a resin 3D printer?</li>
</ol>

PEEK (poly ether ether ketone) has a glass transition temperature of 145 ‎°C (293 °F).
Melting temperature
345 ‎°C (653 °F)
Nozzle temperature
370 - 410 ‎°C
Heated bed
120 - 150 ‎°C
Polycarbonate has a glass transition temperature of about 147 °C (297 °F)
Polypropylene has a glass transition temperature is 215 °C
Polymaker PolyMide CoPA (specialized Nylon) Filament has a softening temperature of ~180 °C, but they don't specify the glass transition temperature.  Other materials have the glass transition temperature about 5 °C below the temperature the material softens.
However, the glass transition temperature is only an indication of a physical change: while uncommon, a material may be rigid enough well above it's glass transition temperature.
How to interpret various thermal-related filament properties?
A side issue to consider as far as layout is FDM prints are weakest between layers (layer separation), so you want a layout where this affects your print the least.