ZMR250 Arm with different hole spacing and different motor mount
thingiverse
Because different hole spacing in circulation, I have uploaded the four most common dimensions. The total length is 117mm and usually you can install 6 inch props. The length from motor mount middle to first frame mount hole middle is 80mm. In this version, there are two motor mounting dimensions available. You can see in the picture which is A and which is B (frame mount dimensions M3). Motor mount dimensions include: 11.8mm - 16.2mm M2 (1804 1806) 15.8mm - 19.2mm M3 (2204 2206) Inner hole dimension includes: 6.5mm (1804 1806) 9.0mm (2204 2206) These dimensions are not for 3D printing, but rather for CNC machining with normal 3mm carbon fiber. You can send an appropriate company the correct file and get the right part. My favorite supplier in Germany is actually https://noblish.com
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