Model Boat Mayhem - Forum

Technical, Techniques, Hints, and Tips => Other Technical Questions... => Topic started by: blackice on April 21, 2012, 06:38:18 PM

Title: Propshaft component order.
Post by: blackice on April 21, 2012, 06:38:18 PM
Could someone please help me with the order in which components should be threaded onto the propshaft?

IE. Starting from the propeller and working back to the coupling insert

Currently it's set at Propeller > nut > washer > shaft tube > washer > nut > coupling insert.

Is this correct and do i assume correctly that you tighten the nuts against the propeller and coupling insert to lock them in place leaving the washers to allow a bit of movement?

Thanks in advance.
Title: Re: Propshaft component order.
Post by: DickyD on April 21, 2012, 07:20:17 PM
Absolutely.     (http://i124.photobucket.com/albums/p8/DickyD_photos/Smileys/tumb.gif)
Title: Re: Propshaft component order.
Post by: john s 2 on April 21, 2012, 07:42:35 PM
As Dicky sayes all fine. Just make sure that prop assembly can move so no play or gap at prop end as this helps seal the shaft and use a suitable Grease to lube shaft and prevent water ingress. John.
Title: Re: Propshaft component order.
Post by: blackice on April 21, 2012, 09:22:06 PM
Great, thanks for your replies.

I've noticed that one end of the shaft has slightly more thread than the other end. Which end should the prop/coupling insert go?
Title: Re: Propshaft component order.
Post by: DickyD on April 21, 2012, 10:58:17 PM
You dont really want any thread entering the bottom of the tube, ideally as it will allow water up the tube.

Dont worry to much if you cant achieve this.(http://i124.photobucket.com/albums/p8/DickyD_photos/Smileys/tumb.gif)
Title: Re: Propshaft component order.
Post by: funtimefrankie on April 24, 2012, 05:51:42 PM
To avoid thread going into the bottom bearing I usually cut some of the thread off the prop end, so the shaft doesn't bottom in the prop.
What I do is screw the shaft into the prop as far as it will go,  without a nut. Measure the amount of thread left visible. Remove the prop screw on the nut and then remove a bit less than the amount just measured. Clean up the end and screw the prop back on. Lock the nut against the prop, pop a washer back on and then put  the lot back up the tube, washer, nut and insert at the motor end.
End play can be adjusted at the motor end.