Newbie - prop fitting and removal

[Hereinmyownskin]

Hi,
I';m new to quadcopter flying. I';ve got an Eachine 250 and have been getting used to flying it. I';ve got King Kong props which don';t seem to fit on the motor shaft. I have been enlarging the inside of the prop with a drill piece. However I';m still finding the fit tight. Is this normal to need to increase the bore of the prop?
Then when I';m taking the props off they are so tight I';m using a screwdriver and wedging it into the motor in order to be able to get enough leverage to unscrew. I';m definitely damaging the motor and I';m hoping I';m doing something wrong! Can anyone offer any advice?
Thanks!
Phil.

[Elmattbo]

Try a different set of props. Usually prop shafts are 5mm but the tolerances on some brands are quite tight. I';ve not used King Kong props but I started out with gemfans and I used to cut my hands to ribbons on broken prop hubs as they were so tough to get off. Dal props are cheap and work fine - have a look at surveilzone.com.
You won';t be doing any damage but it';s not ideal as the tiny little chips of paint and metal off the motors will drop into the windings. It';s unlikely to cause a short but they will find them selves onto the the magnets and cause wear in the long run.


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[hoverfly]

Bin the props and get some with the correct bore. Props can be reamed  out but if not done very carefully its easy to get them out of balance.

[Bajadre]

agree with the guys I usually buy DALs or HQs and never had to ream them etc remember buying packs last year they came with spacers but never used them.

[Ern Stock]

Yes , agree , dals seem to have a nice bore these days.
Previously have used a 3/16 (4.8mm) file , gently passed through the bore once or twice .
Available as std (325) chainsaw file at garden machinery store for £1

[Hereinmyownskin]

Thanks guys for your super fast replies! Any recommended sites to buy from in the UK?

[Bajadre]

Usually buy from

fastlads
makeitbuildit.co.uk
electricwingman.co.uk

and www.hobbyrc.co.uk do some great deals on props 

[Ern Stock]

T9 hobbysport
Unmannedtech

[xxpitt]

rather than just trying to pull the prop straight off try unwide it off, does help if you get a particularly stubborn prop