Modify 40mm props to fit on 0603 0.8mm shaft

I’m building my own 75mm ‘whoop’ with Racerstar 19,000kv 0603 motors - they have a 0.8mm shaft.

Wanting (needing as I have them) to use 40mm 4 blade props, and they are obviously for 1mm shaft motors.

Has anyone any bright ideas how to mod the shaft/prop so they fit?

I’ve tried with plumbers PTFE tape and also with insulation tape on the shaft, but it’s not got enough ‘stick’…


1 Like

@jimbo_wa I saw a recent post on RCG where somebody used 0.8mm shrink tubing to adapt 1mm bore props to a 0.8mm motor shaft. It was in one of the BL whoop threads, I think either UR/UK/US65 or new BetaFPV 2S whoop.


Ah - that’s inspired!

(why didn’t I think of that…)


@jimbo_wa Just came across the original post on RCG, thanks to a reply a few days later. OP includes a link to the 0.8mm shrink tubing. Response offers hot glue as an alternative.

@Brainstorm Good find (again!)

I had 6mm of ‘thin’ heatshrink and it didn’t work so have 2m of 1.2/0.6mm on its way from eBay - hopefully that will work.

Did think about adhesive/hot glue, but can see the props being off-centre/incorrectly balanced?

If not, I somehow seem to have a set of 0703 19,000kv motors arriving just in case… :money_mouth_face:

Did you get the 0603s going? I just got mine going on a 66mm build and had some issues getting the motors to spin up, I had to adjust ppm input through bl heli suite. I was contemplating getting the 1.0mm shaft version of these since they miiiiight be more durable.

On the 66mm frame these 0603 .8mm have plenty of punch and drain a tiny bit more battery than I’d like. If you have this going I wanted to know your luck on the bigger frame with bigger props, or if you actually went 0703s

@bustaphoto I had them spun up on the FC, but never in the air with props on as I received the 0703’s and used them instead…

The larger motors/1mm props have plenty of punch compared to a UK65 though!

1 Like

Roflmfao I did something similar for a set of 720 Motors to make them fit 0825 motor holes.
But that added way to much weight.
Why I didn’t think of this I’ll never know but am gonna try if what I have on hand at home is small enough.