Botex timber trailer brakes and stub axle question

[Dan Maynard]

I'm also a bit confused how it ever left Jas P Wilson like that, I'd have thought worth having a chat with them and hopefully they will be helpful.

[doobin]

Although the video looks dramatic I’d say that’s not an alarming amount of side movement for a slow speed taper bearing application and I shouldn’t think any damage has been done. It only ever sits in one position when loaded. I think you could use a couple of thick washers or a custom made spacer to allow the nut to close it up a bit more, but whatever you do don’t ‘nip it tight’ else bearing destruction will follow very quickly. 

If the rear bearings are not seating against the back of the stub axle then yes I would put the spacer here. 

 

Edited August 28, 2023 by doobin

[swinny]

11 hours ago, doobin said:

Although the video looks dramatic I’d say that’s not an alarming amount of side movement for a slow speed taper bearing application and I shouldn’t think any damage has been done. It only ever sits in one position when loaded. I think you could use a couple of thick washers or a custom made spacer to allow the nut to close it up a bit more, but whatever you do don’t ‘nip it tight’ else bearing destruction will follow very quickly. 

If the rear bearings are not seating against the back of the stub axle then yes I would put the spacer here. 

 

The whole assembly will seat to the back of the stub axle but then the front bearing is not sitting in its race..... this bearing has gone as far up the stub axle it can so it all needs to be shimmed from the rear to bring it forwards into the front bearing. Also it then needs to protrude a bit from the bottom of the thread so the big washer under the nut can push against the front bearing into the race to seat nicely and eliminate any play.

Edited August 28, 2023 by swinny

[doobin]

On 28/08/2023 at 20:05, swinny said:

lso it then needs to protrude a bit from the bottom of the thread so the big washer under the nut can push against the front bearing into the race to seat nicely and eliminate any play.

Whever you do, leave a small amount of play. Tapered bearings should never be even 'nipped' tight.

[swinny]

8 hours ago, doobin said:

Whever you do, leave a small amount of play. Tapered bearings should never be even 'nipped' tight.

Yeah i know