SB-series friction dial drive

[Multi-Volti Devices]

Hello and Happy New Year:

Some time ago I requested help in the form of measurements for the SB-
series dial drive planetary pressure discs (what else do you call
them?). I'll guess they're made of beryllium copper and they eventually
crack.

I am trying to source them, and either measurements, or ideally a dud
pair you've given up hope on I could submit for analysis would be even
better.

I do not have any SB-gear myself.

Murray

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