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Post by karma67 on Jun 12, 2022 17:00:49 GMT
Sony TTS-8000 Bearing Upgrade. Sony originally used oilites/sintered bronze bearings in most of their turntables,the TTS-8000 is no exception. 2 oilites are used along with a nylon? spacer.   The merits of using Lignum Vitae for bearings are well documented, see here, www.google.com/search?client=firefox-b-d&q=lignum+vitae+bearingsI have heard Torlon bearings in the past and they greatly reduced any noise coming from the spindle/bearing surfaces,my train of thought was LV bearings could also be an improvemnet. So a few bids on ebay and i won a couple of old lawn bowling balls,i cut them up into 25mm square pieces and selected the best grain orientation to experiment with.
I turned and fitted 4 pairs before working out which working method produced the best tolerance, the spindle measures 10.98mm so an 11mm H7 reamer was used to finish the bearings. Bearing housing with bearing fitted and being trued up after initial drilling.  Top bearing fitted.  Whilst i was at it i also made a LV thrust pad to go with the bearings,the Sony one was Nylon.  The new LV one.  So thats it,job done,like the torlon bearings the LV ones have reduced the overall noise floor over the standard bronze bearings.The question left is which sounds better Lignum Vitae or Torlon? My plan is to use the LV for a few months to bed in and then turn some torlon ones for comparison. |
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Bigman80
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Post by Bigman80 on Jun 12, 2022 17:26:56 GMT
Really interesting project there, Jamie.
It's nice to see some innovation and experimentation. This sort of thing is way out of my wheel house, so full respect to you!
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Post by karma67 on Jun 12, 2022 17:42:30 GMT
Really interesting project there, Jamie. It's nice to see some innovation and experimentation. This sort of thing is way out of my wheel house, so full respect to you! cheers oli,ive enjoyed it. |
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Post by sq225917 on Jun 12, 2022 17:56:56 GMT
Nice work Jamie.
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Post by rexton on Jun 12, 2022 18:13:49 GMT
Always great to see project like this one. Hats off, Jamie!
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dt79
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Post by dt79 on Jun 12, 2022 21:54:17 GMT
Hats off indeed Jamie. I’m in awe of anyone who has this level of resourcefulness and skill.
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Post by antonio on Jun 13, 2022 5:07:36 GMT
Super job again Jamie, do you ever sleep at night, your head must be spinning with ideas  |
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Post by awkwardbydesign on Jun 13, 2022 21:41:19 GMT
Aren't Lignum Vitae bearings usually water lubricated? Are you using oil? It will be interesting to see how they age, and if they shrink or swell. I have done something similar, but just with thrust pads for L75s, plus a record weight.
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Post by karma67 on Jun 18, 2022 5:25:14 GMT
Lignum contains natural oils but in this application i have also added some low viscosity oil for the thrust pad.
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Post by karma67 on Jun 25, 2022 16:42:59 GMT
so after removing the LV thrust pad for inspection here's what i found,to be honest the wear is so small its hard to capture in a photo.  |
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Bigman80
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Post by Bigman80 on Jun 25, 2022 17:11:27 GMT
so after removing the LV thrust pad for inspection here's what i found,to be honest the wear is so small its hard to capture in a photo. How long has it been in use for? How does that compare to any other material you have tried. Is it Argentine Lignum Vitae? 😉🤣 |
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Post by karma67 on Jun 25, 2022 17:20:44 GMT
1.about 2 weeks,approximately 2 hrs a night. 2. thats one of the reasons i wanted to go back to torlon to compare. 3. lol dont you start!  |
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Bigman80
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Post by Bigman80 on Jun 25, 2022 17:25:21 GMT
1.about 2 weeks,approximately 2 hrs a night. 2. thats one of the reasons i wanted to go back to torlon to compare. 3. lol dont you start! Ok, keeping tabs then. Excellent. Watching with interest. 3) 🤣 |
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Post by sq225917 on Jun 25, 2022 18:50:33 GMT
I'd except it wear quite quickly, forming a small impression, then get no worse over time as it polishes up.
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Bigman80
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Post by Bigman80 on Jun 25, 2022 19:57:49 GMT
With it being a natural material, won't its form change as the environment around it changes?
Humidity, heat etc?
May be a daft question but I was wondering
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Post by karma67 on Jun 25, 2022 20:52:36 GMT
With it being a natural material, won't its form change as the environment around it changes? Humidity, heat etc? May be a daft question but I was wondering yes but most things do,torlon for instance is susceptible to moisture. if anything happens with LV i have not noticed or heard anything detrimental,ie the platter still spins freely and the bearings still exhibit a close free running tolerance.
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Bigman80
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Post by Bigman80 on Jun 25, 2022 21:18:59 GMT
With it being a natural material, won't its form change as the environment around it changes? Humidity, heat etc? May be a daft question but I was wondering yes but most things do,torlon for instance is susceptible to moisture. if anything happens with LV i have not noticed or heard anything detrimental,ie the platter still spins freely and the bearings still exhibit a close free running tolerance.
Ok, fair enough. |
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Post by sq225917 on Jun 26, 2022 12:16:59 GMT
Across a 50 degree range you'll see virtually no change in tolerance, best to think of it as a composite rather than a typically grained wood. It's closer to panzerholz than oak for example.
It's not hygroscopic either, at least not when oiled.
Thetes a reason It's used in high pressure sleeve bearings in marine environments and still the preferred choice in hydroelectric power stations.
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Bigman80
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Post by Bigman80 on Jun 26, 2022 12:26:42 GMT
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Post by karma67 on Jun 26, 2022 14:13:22 GMT
for clarity that article actually states,'for fear of an explosion Nearby capable of blowing the oil and seal from the stern tube'.
the bearings themselves won't blow up or catch fire.
personally i choose to make a set from LV because having heard the reduced noise floor that using torlon bearings gave i was keen to hear if LV bearings improved on it. they did! 
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Post by sq225917 on Jun 26, 2022 14:19:22 GMT
Nope. The explosion risk is from other items inside the engine compartment not from the lignum bearing.
They're just run on pumped water, or open bath, usually fitted externally
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Bigman80
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Post by Bigman80 on Jun 26, 2022 14:26:59 GMT
I'm not suggesting the TT will burst into flames lol.
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Post by karma67 on Jun 26, 2022 14:56:36 GMT
I'm not suggesting the TT will burst into flames lol. i didnt think you were mate,unless its made by...... |
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Bigman80
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Post by Bigman80 on Jun 26, 2022 15:28:50 GMT
I'm not suggesting the TT will burst into flames lol. i didnt think you were mate,unless its made by...... Hahahahaha, naughty. |
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Post by sq225917 on Jun 26, 2022 21:10:09 GMT
Someone been making flamethrowers?
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