Efoil 65161 / 65121 (ø12 + M8 end, ø4 pin): prop hub dimensions
The fit dimensions PropShaper uses for e-foil and boat 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 | ø8.4 mm |
| Drive slot | 4.3 mm wide × 4.5 mm deep across the front face |
| Front counterbore | ø12.1 mm × 16.5 mm deep |
| Rear counterbore | ø17.5 mm × 5 mm deep |
| Hub body | ø53 mm × 35 mm long |
Source quality: Manufacturer drawing or CAD.
Fit notes
Flipsky/Maytech drawings: ø12 shaft with a ø4.1 pin hole 14 mm from the shoulder and an M8×1.25 end 25 mm long. Stock props step ø12.1 to ø8.2 and take the pin in a 4.2 mm slot across the motor-side face, so the prop slides on over the pin; an M8 nyloc in the aft pocket holds it. Slot depth and nut pocket are conventional; test-fit the slot on your pin.
Sources
- Maytech 65162 drawing (ø12, M8×1.25, pin 14 mm from shoulder)
- Flipsky 65161 (ø12 shaft, M8 end, ø4.1 pin hole)
- Flipsky ABS prop (ø12.1 to ø8.2 bore, 4.2 slot)
- Community props (foil.zone design share)
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.