• Help... URGENT!
  • Torque value for Front Hub nut using Stub Axle stiffeners / Bearing Spacers?

2015/09/21 12:18:45
Jason
Hi,
If anyone has experience with or is using stub axle stiffeners / bearing spacers in their front hubs, what torque settings have you used for the hub nut?
The only info that came with the parts from the bearing spacer manufacturer/supplier says to do the nut up "full tight".
I get what they mean, but a torque value would be nice if anyone can help please?
I've tried contacting MSF racing components, but no response on the phone as yet. Hoping to fit the struts today & would like to have them finished first. . . so I don't forget the hub nut isn't torqued down once the struts are in.
Cheers, Jason.
2015/09/21 12:42:23
ronsmallford
Factory manual says tighten to 27 lb ft while rotating hub to bed in then back off 90 degrees. Wont this still be applicable?
2015/09/21 13:00:05
Jason
Thanks, I don't think so, but I'm not exactly sure.
My understanding of it, in this case at least , is that the bearing spacer/stub axle stiffener sets the preload on the bearings, not the torque value on the hub nut itself.
This is what allows the hub nut to be tightened to 'full tight', according to the manufacturers instructions. . . whatever that means!
Just don't want to damage the threads on the stub axle or nut by over tightening things.
My idea of 'full tight' could well do some damage!
 
2015/09/21 14:35:31
Johnscapris
Jason,
 
I would use 45 ftlb and then lock the nut.
 
 
Regards
John
 
 
2015/09/21 14:40:13
ronsmallford
I just read up on the msf site and now understand the concept.
The spacer is a predetermined length so that when the hub nut is tight the correct bearing clearance is achieved. MSF should explain what "full tight" means. In the mean time we know the nut will stand 27 lb ft. (reading for capri strut).
It looks like whats meant is "done up" instead of backed off 90 degrees.
2015/09/21 19:14:35
Jason
Yeah, that's it essentially.
Finally managed to get through to MSF Racing Components.
They don't specify torque values as it's dependent on the thread size of the hub spindle, plus strength & size of the hub nut. . . which makes sense really. So 'full tight' would be different for every application.
For a 3/4 inch spindle thread & a thick high tensile nut, around 100 lb ft or so was mentioned though.
I'll go with what John said I think as my spindle threads are closer to 5/8 or 11/16.
Thanks for the input guys, much appreciated.
 
Cheers, Jason.
 
 

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