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star sapphire washer on spindle?

what is the deal with this washer?  i’ve had a sapphire and star sapphire, both came with this washer.  it appears too thick to allow the record to clamp or vac flat against the platter.... don’t get it.

both these tables are mid-80’s tables. with reflex clamp.  have searched and can’t seem to find any info.

thks
tripwr1964
tripwr1964 OP
3 posts
 
what's the correct thinkness?

one i have on both tables is rubber and ~.095" (or 2.4mm) thick.
the notch on the platter is only .010" (0.25mm) deep.

so the reflex clamp is suppose to compress this rubber washer .085"?


mofimadness's avatar
mofimadness
4,982 posts
 
The washer keeps the center of the record (the label) up just a bit, so when you use the clamp, the edge of the record flattens out against the platter.

On the SOTA tables, you only use it if you have the reflex clamp.

VPI, Oracle and several others use this same approach.
yogiboy's avatar
yogiboy
5,656 posts
 
I found that the washer that came with my VPI useless. When I used it with a clamp,the record would never flatten out against the platter. As a matter of fact most of the time I don't even bother using the clamp!
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