Torque Spec for WOPL Backplane Transistors

mlucitt

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Jun 24, 2011
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#1
This information may be buried in an obscure post, but is there a consensus on the proper torque for the Output Transistor 6-32 Hex Socket Screws in the kit supplied by Joe? If the spec is in the instructions, I can't find it.

This source http://www.federalscrewproducts.com/torque-chart.htm
lists a spec for 316 SS 6-32 screws as 10.1 inch-pounds. This seems reasonable, but I would like to know what you all think? It would be a shame to spin one of those PEM standoffs... What does PEM stand for anyway?

I would like to set my torque screwdriver and then the screws may not be exact, but they will be consistent.

Thanks,
Mark
 

Gepetto

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#2
Hi Mark
It is in the instructions, 5-6 in-lbs. I noticed that this is in the PL700 instructions but not the PL400. Just added in RevO, step 31

Don't overtorque or you will compromise the insulators.
 
Last edited:

mlucitt

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#3
Joe, thanks. 5-6 in-lbs. sounds good, we just need to compress the Sil-Pads a bit, right. It is half of the max fastener size torque, so just about right.

Thanks!
 

FredR

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#5
Over-tightened once. Breached the silpads. Voltage on the chassis. Just a tingle, but a lot of rework. Don't want to go there.
 
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