RC plane 1/4″ bore (APC thin electric 9 to 13″): 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 | ø6.4 mm |
| Rear counterbore | ø9.6 mm × 2.6 mm deep |
| Hub body | ø20.3 mm × 10.4 mm long |
Source quality: Manufacturer drawing or CAD.
Fit notes
APC thin electric hub: ø20.32 × 10.41, 1/4″ bore (APC 12x6E / 13x6.5E pages). The 3/8″ × 0.10″ recess on the motor side accepts APC LPAR06E adapter rings (1/8″, 4, 5, 6 mm, 5/16″).
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.