Re: [ATM] Mirror Cells - Springs vs. Push/Pull

["Tom Krajci" <tom_krajci@tularosa.net>]

>From: "Donald Good" <donald.good@comcast.net>

>WARNING!  Simply making hachsaw cross-cuts in your collimation bolts will
>leave scratches in the bolts at the thinnest part (at the bottom of the
cut)
>creating stress risers.  Stress risers are locations in materials that lead
>to concentrations of stress forces leading to fatigue failure, something
>that you do not want in your collimation bolts.  The most common cause in
>the fabrication process is sharp corners or scratches while making load
>bearing parts.

>For such modifications in critical load bearing parts like collimation
>bolts, it is strongly recommended that scratches and tool marks left at the
>high stress parts be polished out....

Thank you for the warning.  However if I use this approach in collimation
bolts...and I subject the collimation bolts to relatively little bending (a
couple degrees?)...is this fatigue failure less likely to happen?

Tom Krajci
Cloudcroft, New Mexico
http://overton2.tamu.edu/aset/krajci/



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