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Hello!
My friend has sent me this diagram that is Lenco L75 platter, can anyone tell me the dimension (dimension x height x thickness) based on the attached diagram??
Thanks!
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It has different thicknesses in different places. They are all specified. For example, the thickness at the spindle is 28.19-mm - 1.78-mm = 26.41-mm. The thickest part is at the outer edge, which is 28.24-mm thick.The outermost diameter is 312.60-mm. The record supporting surface has an outer diameter of 299.00-mm at which point an 11-degree bevel begins going out to the edge of the platter.
The spindle hole is tapered. It starts out with a 9.000-mm diameter at the bottom and tapers up to a 7.200-mm diameter at the top.
Actually, all the dimensions are laid out very nicely, but it might seem a little confusing because it is difficult to see the cross-section of the platter. See if this picture makes more sense to you. It depicts the cross-section of the platter from the center-line of the spindle hole to the outer edge of the platter. In other words, it is only half of the platter.
Edits: 10/18/16 10/18/16
The drawing is done in a EU, or DIN style of nomenclature-
using 0.00 as a starting point and measuring cumulatively from that point...
I read the drawing as follows- Round plate 312.6mm in diameter at 28.24mm thick-
one should plan on a slightly larger set of dimensions to machine down to those numbers - but i think that this answers your question-
Having said this - the drawing makes me think that the new platter could ring like a bell w/o some damping....
Happy Listening
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