To: atm{at}shore.net
From: tkrajci{at}san.osd.mil
Reply-To: tkrajci{at}san.osd.mil


> From: "clement.focuser" 

> How does one set the preload when using a single X bearing so there
> is no axial or radial play? One way is to increase the diameter of
> the bore or decrease the diameter of the housing....

> ...I created a gap between the housing and bore by using a
> temperature differential between bore and housing when assembling.
> The gap is filled with anaerobic Red Loctite. Loctite sets before the
> bearing assembly comes to thermal equilibrium. This was an iterative
> process. I had to assemble and disassemble a few times before getting
> a satisfactory bearing assembly.

During your iteration...how did you evaluate that preload was too little,
too much, or just right?  Dial indicator and measured/controlled forces on
the assembly?  Measuring the friction of the bearing assembly when it
rotated?  Or just yanking on the assembly until you said to yourself 'TLAR'
(that looks about right)?

Thanks in advance,
Tom Krajci
Tashkent, Uzbekistan

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