T-mount (2–4″ micro): 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 | ø1.6 mm |
| Screws | 2 × ø2.1 mm holes, 5 mm centre to centre |
| Hub body | ø10 mm × 5 mm long |
Source quality: Manufacturer drawing or CAD.
Fit notes
Two M2 screws at 5.0 mm center-to-center + ø1.5 mm shaft locating hole (ø1.6 drawn for slip fit). 5 mm hub height suits M2×7 screws. Spacing published by Gemfan; a few motors differ — check your motor datasheet.
Sources
- Gemfan T-mount spec (5 mm eye-to-eye)
- Emax ECO 1404 drawing (4-M2 on ø5, 1.5 mm shaft)
- BetaFPV 1204 (M2 on ø5.0)
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.