[TheForge] "Lug nut" torquing - order of tightening? OT

[David E. Smucker]

Bruce,  Go to the following website,    http://www.superbolt.com/

Then call and talk to their application engineers.  They should be able to 
give you real world experience.  I have used their systems for real world 
critical applications of heavy load applications.  Good Folks.

Dave Smucker
----- Original Message ----- 
From: "Bruce Freeman" <freemab222 at gmail.com>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Friday, April 04, 2008 10:54 AM
Subject: [TheForge] "Lug nut" torquing - order of tightening? OT


> This relates to my earlier question of torquing SS bolts, but now I'm
> thinking in terms of order.
>
> The bolts are in two circles, tightening together a stack of disks.
> We want pressure uniform.  To complicate matters there are twice as
> many bolts in the outer circle than in the inner, namely 36 vs 18.
> Number them by the inner bolts:  1, 2, 3, ..., 18 for the inner, 1',
> 1", 2', 2", 3', 3", ..., 18', 18" for the outer.
>
> For one time through, we snugged the bolts around the circles, then
> tightened:  1, `10, 1', 10', 1", 10"; then moved on to 2, 11, 2', 11',
> 2", 11", etc.
>
> Another time through we tightened, 1, 1', 1", 10, 10', 10"; then moved
> to 2, 2', 2", 11, 11', 11", etc.
>
> But later I got to thinking that this might not be ideal.  For lug
> nuts, you tighten in a star pattern.  I presume something similar
> would  be better for this stack as well.  But what offset?  180degrees
> then 90 degrees?  or ~60 degrees?
>
> Any thoughts or wisdom to share?
>
> -
> Bruce
> NJ
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