Gemfan 1608 40 mm 3-blade propeller (1.5 mm) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/gemfan-1608-40mm-3-blade/  (sheet CC BY 4.0)
Basis: Secondary source: GetFPV (copy of the maker's figures; the maker publishes none directly)
Catalog version: 2026-10-20

Overall (mm): length 40, width 40, height 5
- Whoop prop for 1102-class motors on 1.5 mm shafts.
- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.
- Secondary source: the numbers come from a retailer or magazine copy of the maker's specification.

dimension  value
Diameter  40 mm (1.6 in)
Pitch  0.8 in
Hub thickness  5 mm
Bore / mount  1.5 mm hub ID
Weight  0.42 g
Blades  3

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- GetFPV: Gemfan 40mm 1608 3-Blade PC (1.5mm) — web — Publisher's page; dimensions are facts — https://www.getfpv.com/gemfan-40mm-1608-3-blade-polycarbonate-propeller-set-of-8-1-5mm.html

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/gemfan-1608-40mm-3-blade/index.json
API: https://xemstudio.com/api/geometry?object=gemfan-1608-40mm-3-blade