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  1. 23-05-2012 #11
    njhussey's Avatar
    Lives in Gloucester, United Kingdom.
    njhussey
    Last Activity: 29-06-2025 Has been a member for 9-10 years. Has a total post count of 1,375. Received thanks 127 times, giving thanks to others 89 times.
    Quote Originally Posted by Jonathan View Post
    If the bearings were a press fit the belleville washers wouldn't do anything - you must have a sliding fit so that the springs can apply a preload.
    Ok, yes I can see that.

    Quote Originally Posted by Jonathan View Post
    Yes for an 'upwards' axial force it's constrained - but not downwards. If it wasn't for the normal bearings and grubscrew the shaft could just fall out.
    How does the motor work with a prop on it in a plane then? There is a circlip to stop the shaft pulling out if the motor is used as a pusher or reverse mounted but nothing to stop it being pulled out apart from the bearings and the grub screw as you say. This seems to be enough for a model so I'd have thought it would have been enough?

    Maybe if I machine 2 steel collars 8mm ID and 10mm OD and secure them with grub screws (locktited in of course!!) one above the top bearing and one below the bottom then that would stop the movement? Would the grub screws be strong enough?

    I'll do a drawing later as on the mobile...
    Last edited by Jonathan; 23-05-2012 at 07:24 PM. Reason: Fixed the 'quote' tags.
    Neil...

    Build log...here
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