# Gemfan 40 mm 3-blade propeller (1.5 mm shaft, BetaFPV)

> What are the dimensions of the Gemfan 40 mm 3-blade propeller (1.5 mm shaft, BetaFPV)?

- Category: Drones › Propellers
- Kind: Modern device
- Basis: Manufacturer specifications (BETAFPV)
- Page: https://xemstudio.com/objects/betafpv-gemfan-40mm-3-blade-1-5mm/ · JSON: https://xemstudio.com/api/geometry?object=betafpv-gemfan-40mm-3-blade-1-5mm · Plain text: https://xemstudio.com/objects/betafpv-gemfan-40mm-3-blade-1-5mm/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width |
|---|---|
| 40 | 40 |

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- BetaFPV's Cetus Pro / 75 mm whoop prop; BetaFPV notes the hub was changed from three holes to one.
- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.

## Sizes

| dimension | value |
|---|---|
| Diameter | 40 mm |
| Pitch | not published |
| Hub thickness | not published |
| Bore / mount | 1.5 mm inner diameter, single hole |
| Weight | 1.94 g per set of 4 (2CW+2CCW) |

## Where the files are

- BETAFPV: [Gemfan 40mm 3-Blade Propellers (1.5mm Shaft)](https://betafpv.com/collections/1-2-inch-propellers/products/gemfan-40mm-3-blade-propellers-1-5mm-shaft-2) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/betafpv-gemfan-40mm-3-blade-1-5mm/index.json

- betafpv-gemfan-40mm-3-blade-1-5mm-swept-disc: [STEP](https://xemstudio.com/files/hardware/betafpv-gemfan-40mm-3-blade-1-5mm/betafpv-gemfan-40mm-3-blade-1-5mm-swept-disc.step) · [STL](https://xemstudio.com/files/hardware/betafpv-gemfan-40mm-3-blade-1-5mm/betafpv-gemfan-40mm-3-blade-1-5mm-swept-disc.stl) — Swept disc Ø40 mm, 1 mm reference (hub thickness not published), Ø1.5 mm bore — blades not modelled

## Questions

**What shaft does the Gemfan 40 mm 3-blade propeller (1.5 mm shaft, BetaFPV) fit?**

Bore/mount: 1.5 mm inner diameter, single hole.

## Fits with

- [FPV drone motor sizes: 1104 to 3115, shaft, prop thread and mount patterns](https://xemstudio.com/objects/fpv-drone-motors/)
- [APC 8x4E electric propeller](https://xemstudio.com/objects/apc-8x4e-propeller/)
- [APC 8x6E electric propeller](https://xemstudio.com/objects/apc-8x6e-propeller/)
- [APC 9x4.5E electric propeller](https://xemstudio.com/objects/apc-9x4-5e-propeller/)
- [APC 9x6E electric propeller](https://xemstudio.com/objects/apc-9x6e-propeller/)