GepRC GR1204 1204 5000kv brushless motor quick review

The GepRC GR1204 is a 1204 sized motor (12mm wide, 04mm high stator) suitable for micro quadcopters that is available in 5000kv. Specifically this stator size and kV has been identified as an ideal size to build an ultralight 3 inch build like a TP3. I bought mine from Banggood here to use for a ultralight 3" TP3 build that I've reviewed and discussed here.

The GR1204 uses modern design and manufacturing so that weight is just 3.8g per motor (no wire). The stator is 1mm wider than early 11 series motors which offers slightly better torque and efficiency which is needed to better control a light 3 inch propeller. They are in a gold colour that looks better than the stock image suggest - they are beautiful in real life. Mounting for propeller is a standard 1.5mm shaft with 2 x m2 screws for a t-mount.

Specifications:

• KV: 5000KV
• No. of Cells (Lipo): 5000KV @ 3-4S
• Configuration: 9N12P (i.e. 12 magnets for betaflight RPM filtering)
• Stator Diameter: 12mm
• Stator Height: 4mm
• Shaft Diameter: Φ1.5mm (2mm internal)
• Motor Dimension(Dia.*Len): Φ15.28*10.9mm
• Rotor: N52H arc magnets
• Base casing : 7075-T6
• Weight: 3.8g

Included in the pack is the motor with reaaaaly long silicon wires (more than you'd ever need on any 3") and micro JST plugs. Also included is heaps of M2 screws mounting the motor on practically any frame thickness typical for this size. Also you get the stickers for the sticker-bomb glam shot:

In terms of application they are best suited to a very light 2.5 or 3 inch micro build. I don't really recommend 2 inch in general these days because performance is down significantly on 2.5 and 3 inch. WIth propellers bigger than 3" the motor simply isn't responsive enough - I found that on even on 3 inch that 3s response is down in the high throttle range when using a fairly agressive pitch as found on the gemfan 3018 twin blade - the gemfan 3016 triblade would be better. When you do get the application (and weight) right, these motors are very nice - responsive, powerful and very efficient. I was getting up to 5 minutes flight time on a little GNB 2s 450mah pack as seen on the video below:

I can definitely recommend the GEPRC 1204 motors for light 2.5 inch and 3 inch builds, they are well made, beautiful and more importantly perform great. If you find them out of stock the RCInpower GTS 1204 motors are similar as are the Xing nano 1204. Again if you wish to see the full build and review article for the quad I built these motors with, follow this link: https://www.quadifyrc.com/reviews/tp3-ultralight-3-micro-quad-build-and-review-lockdown-edition

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