Hello everyone
      I am having problem with mounting propeller to motor   here are the specifications
1.)Avionic M1826/31 KV1800 MICRO brushless motor (http://rcbazaar.com/products/1942-avionic-m182631-kv1800-micro-brushless-motor.aspx)
2.) 8*4 E propeller
           the diameter of propeller is more than the side screws of the motor  
but this propeller is suggested by rcbazaar so i thought that it will no problem
           Some how i manage to mount the propeller but when i increase the throttle of motor rubber band slips and propeller comes out.
  
Please suggest me any  Idea  

try a prop adapter

Sent from a potato using a lamp

thank you aniket210696 and aniket1995  i have tried prop adapter(circular objects ) but it did not work with single prop adapter so i inserted two prop adapters into prop then finally it worked properly. very soon i'll be completing my russ 40 . want little bit help again  what can i use for push rod from scratch, i have tried umbrella thin sticks, is there also any other option.

Know i know the name of that thing

how did you put 2 prop adaptors?

this is a PROP ADAPTOR:-



this is a PROP SAVER:-



now which one of these you tried?

Sorry i had some misunderstanding , after referring your pics i came to know that i am having propsaver with the motor . and had issue with it, even aniket1995 was not knowing what to call that circular objects , please tell us what to call that circular thing.

This was the problem

those can be called prop fitting rings... what you need to do is take those rings and see which one fits the motor shaft. then put that inside the prop hole and then mount it on the prop saver. or simply buy a prop adaptor... the prop you have is very difficult to mount on a prop saver though

Sent from a potato using a lamp

prashant ... your prop and motor size looks like an issue... the prop is way to big for the motor .. either you are using prop used for engines.... cause 3 mm shaft motor cannot have a prop with such big dia..... Try another prop.

Prasanth the prop you are using are electric prop from rcbazaar..
Get gws  style prop from rc dhamaka or some lhs, comes in orange colour mostly.. those are the props for the motor you are using...and use 7030 or 6030 with that motor...
I guess 8" will be overkill for those...

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I agree with arun... go easy or you'll burn the motor...

Sent from a potato using a lamp

Sorry for the misunderstanding guys

@Aniket210696 : Thank you so much bro, but those rings are not working on the motor shaft so i am planning to buy another prop. as suggested by arun.shreelakam

@rastsaurabh :  but prop was suggested by rcbazaar

@arun.shreelakam
  i am building russ40 by reading your post of building it and successful flying on your birthday
yes i am changing the propeller because their is no other option. although rcbazaar website had suggested 8*4 E for this motor

can i use the same prop for pusher model

Yes just turn the prop around and switch 2 of the 3 wires of the motor to the esc and your motor can now be used as a pusher

Thank you so much priyum 

Happy to help