Conductive SS to SS pivot

[MountainLogic]

I'm an EE in need of some metals advice.

I need to add a small lever to a Printed Circuit Board (PCB) to push a small plastic part with a max force of about 200g. This is part of a high impedance, low power circuit running at 0.5 A at 4.5V for 1 second with an infrequent duty cycle. The power runs through this pivot/bearing. I need to keep the resistance down to below 5 ohms and the resistance needs to be constant over time. The pivot (a round PCB PEM nut that press fits into the PCB) is described as "300 Stainless Steel Passivated and/or tested per ASTM A380" The pivot has an OD of 0.219". A tubular sleeve with lever arms fits over the pivot.

My questions are:
1) Is a similar SS material the best choice for the sleeve/arm?
2) Should I use conductive grease?
3) How much slop should I allow for between the pivot and the sleeve?


FYI, more details of the KPS6 pivot:

http://select.pemnet.com/interactiveSearch.php?FASTACT=ISEARCH_PRODUCT2&FPRODUCTID=2424&PAGEID=

Thanks

 

[EdStainless]

I would bridge the joint with a braided Cu strap. You could use a conductive (Cu loaded) grease, but I would expect highly variable results.

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