T-Motor MN direct (ø4 + 4×M3 @ ø12): prop hub dimensions
The fit dimensions PropShaper uses for drone and RC propellers on this mount, with the sources behind them. Open it in the studio to design a propeller around this hub and export an STL for printing.
Dimensions
| Shaft bore | ø4.1 mm |
| Screws | 4 × ø3.2 mm holes on a ø12 mm bolt circle |
| Hub body | ø18 mm × 7 mm long |
Source quality: Manufacturer drawing or CAD.
Fit notes
From T-Motor's official MN3110 2D drawing: ø4 shaft + four M3 rotor-face holes on a ø12 bolt circle (drawn ø3.2 clearance). Common across MN-series navigator motors — confirm your exact motor's drawing in their Download Center. Hub OD/height conventional.
Sources
Every dimension stays editable in the studio, so you can adjust the bore or add a set screw to match your own hardware. Printed props are prototypes: check the fit on the bench and spin them up behind a guard.