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Questions about VPI TNT-MK-IV Platters

Hello all,
I have a friend, who owns a VPI TNT Platter. He notes slippage of the Platter on the Bearing Flange,when clamping an LP. His has a 3-point Pin System, but claims he noticed some Black "Goop" in between Platter, and Bearing Flange? Is this stuff supposed to be there, and was it used by VPI?

My MK-IV all Acrylic Lead Filled Platter never had this Goop, Doesn't ever slip, but my Spinde does have a Rubber O-Ring. He claims his doesn't?

Can any give the low down on the different version Platters of the past? Thanks, Mark
markd51
tobes's avatar
tobes
436 posts
 
There shouldn't be any requirement for 'goop' on the bearing flange. I've used the VPI lead filled platter on my TNT for about 20 years and never experienced the slippage your friend reports.
The bearing spindle on the TNT's has o-rings which grip the spindle hole of the platter fairly tightly - in fact it's awkward to lift the platter off without lifting the bearing/ spindle. You'd have to be really torquing down the clamp to move the platter levelling grub screws on the flange.
Does your friend have the o-rings on his spindle?
Which clamp does he use?
markd51's avatar
markd51 OP
766 posts
 
Hello Tobes, Thank you for confirming what I suspected.
I might be wrong, but I've pretty much concluded that all of the older non-inverted Bearings, other than the HW-19Jr Platter-Bearing, used a Rubber O-Ring on Spindle.

I assue the person is probably using the One Piece Delrin, or Stainless Steel Clamp, and I did remind him that one is not supposed to tighten an LP to Platter with a death grip force. To clamp LP just enough so that LP edge contacts Platter, and that's it, no more. Mark
frogman
7,562 posts
 
Not all of the older non-inverting bearings used o-rings. I have a MK IV upgrade platter/bearing that does not use o-rings. The HW19 MK1-3, to the best of my recollection did not use o-rings. I do have a TNT MK V bearing/spindle on my TNT that does use o-rings.
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