[RASMB] torque strength with Al centerpieces

[John Correia]

A rather fundamental aspect of torquing a cell assembly that appears to be overlooked or not learned by new users is the fact that you must tighten & release, tighten and release at least three times.  The ring slips for the 1st 2-3 torques and thus you do not obtain the target lbs until you stop slipping.  This alone may help to prevent cell leakage.
 
 
 
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 Dr. John J. "Jack" Correia
 Department of Biochemistry
 University of Mississippi Medical Center
 2500 North State Street
 Jackson, MS  39216
 (601) 984-1522                                 
 fax (601) 984-1501                             
 email address: jcorreia at biochem.umsmed.edu     
 homepage location: http://biochemistry.umc.edu/correia.html
 dept homepage location:    http://biochemistry.umc.edu/
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>>> "Karen Fleming" <Karen.Fleming at jhu.edu> 11/16/05 9:34 AM >>>

We have a user here who is having leakage problems with some Aluminum 
2-sector centerpieces. We're using sapphire windows, so has anyone had 
any experience torquing these cells to 130 or 140? Would this damage 
the centerpieces? I know that charcoal-epon centerpieces can be torqued 
higher, but they are not an option for this experiment at the moment.
-Karen F.
****************************************************
Karen G. Fleming, Ph.D.
Assistant Professor
Thomas C. Jenkins Department of Biophysics
Johns Hopkins University
3400 North Charles Street
Baltimore, MD 21218

Voice: 410-516-7256
Fax:    410-516-4118
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