Hello!!

I Have emax motors 2205RS 2300KV since a week and I don't know why any HQ Prop I tried on them didn't fit properly. I have to apply a lot of strengh (really !!!!) to push them down... And if i have to change the props it's a pain to take them out of the shaft of the motors.

Any idea what kind of prop i might use to get them installed easily? Why is this happening? I don't think it's a normal process for propellers installation and I would like to have any information if you guys know what the problem is!?

HQ prop 5 X 4.1-4.8 X 3 V1S

Thank you

Do you live somewhere cold by any chance? Plastic shrinks, and motor shaft expends when motor gets warm... making it harder to put on?
Still it's better tight than loose, which can contribute to unbalance when it's spinning.
Cyclone props are my second choice to the more expensive HQ, give them try
if you don't know what pitch to get, try the 5045x3 those are my go-to for 2300-2500kv motors

I have the same EMAX RS2205S motors on my 5" quad but I've never tried any HQ props on them so I'm afraid I can't answer your question as to why they might not fit properly.

I'm running DAL Cyclone T5045C props on mine and those ones fit and work just fine.

I had that happen to me a couple of times...don't remember what brand of props.

But, my solution was to 'screw' the props on the shaft rather than trying to force them down past the threads.

Many times i have had no trouble installing the props but then getting them off was a challenge. So, i 'unscrew' the difficult ones.

That is strange. I don't have Emax motors, but I've noticed that HQ props seem to be generally a looser fit than DALs. It's nothing huge by any means, but the HQs are a bit more sloppy on the shaft. I always figured it was from the thinner hub. 
May be nothing more than the particular batch of props that you have. Next ones may fall onto the shaft.

(01-Jan-2019, 12:40 PM)roger74 Wrote: I had that happen to me a couple of times...don't remember what brand of props.

But, my solution was to 'screw' the props on the shaft rather than trying to force them down past the threads.

Many times i have had no trouble installing the props but then getting them off was a challenge. So, i 'unscrew' the difficult ones.

I agree, I do the same.

Another more extravagant (over)engineered option would be to re-drill the holes with an 5mm drill. To do this without introducing any balancing issues you would need a tower drill so you re-drill the hole perfectly parallel, and you would also need to ensure the existing hole is perfectly centred under the 5mm drill bit (easier said then done if you don't have the proper equipment) to avoid re-drilling the hole off-centre.