Gemfan 40 mm 3-blade propeller (1.5 mm shaft, BetaFPV) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/betafpv-gemfan-40mm-3-blade-1-5mm/  (sheet CC BY 4.0)
Basis: Manufacturer specifications (BETAFPV)
Catalog version: 2026-10-20

Overall (mm): length 40, width 40
- 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.

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)

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- BETAFPV: Gemfan 40mm 3-Blade Propellers (1.5mm Shaft) — web — Publisher's page; dimensions are facts — https://betafpv.com/collections/1-2-inch-propellers/products/gemfan-40mm-3-blade-propellers-1-5mm-shaft-2

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/betafpv-gemfan-40mm-3-blade-1-5mm/index.json
API: https://xemstudio.com/api/geometry?object=betafpv-gemfan-40mm-3-blade-1-5mm