Teres bearing
- izzy wizzy
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#1 Teres bearing
After 20 years or so running, the 401 bearing thread made me think I should look at mine. It was getting a bit noisy with a small scraping noise about every revolution.
There's quite a bit of wear on the thrust plate. I can't remember the material of the white one which was an upgrade over the original so that's going in.
When I spin the shaft on the thrust plate I can see the ball grips the thrust plate so the shaft spinning on the ball was probably the scraping noise.
Rest of the bearing seems fine so looking forward to putting it all back together. Just got to find the place where it says how much oil to put in.
There's quite a bit of wear on the thrust plate. I can't remember the material of the white one which was an upgrade over the original so that's going in.
When I spin the shaft on the thrust plate I can see the ball grips the thrust plate so the shaft spinning on the ball was probably the scraping noise.
Rest of the bearing seems fine so looking forward to putting it all back together. Just got to find the place where it says how much oil to put in.
- Paul Barker
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#2 Re: Teres bearing
Teflon
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- izzy wizzy
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#3 Re: Teres bearing
Or possibly Delrin from memory. Maybe Mark can remember.
- Paul Barker
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#4 Re: Teres bearing
Well, turns out it is Delrin, a ptfe filled plastic.
You can get teflon bar or flat at those gatherings around the country between model engneers and the people selling them machinery and consumables. I dont have time for them these days.
If I were designing a thrust plate for a turntable Id use ptfe bar, made to fit.
Though I doubt it would better an original grease bearing. If I were a turntable engineer Id reverse engineer that.
As for 401 not sounding as good to me as a 301. They are made of different materials, why would two things with different metalergy sound the same?
You can get teflon bar or flat at those gatherings around the country between model engneers and the people selling them machinery and consumables. I dont have time for them these days.
If I were designing a thrust plate for a turntable Id use ptfe bar, made to fit.
Though I doubt it would better an original grease bearing. If I were a turntable engineer Id reverse engineer that.
As for 401 not sounding as good to me as a 301. They are made of different materials, why would two things with different metalergy sound the same?
"Two things are infinite, the universe and human stupidity, and I am not yet completely sure about the universe." – Albert Einstein
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#5 Re: Teres bearing
Why wouldn't they ?
Just because you say it , deosnt make it true .
Just because you say it , deosnt make it true .
#6 Re: Teres bearing
I agree with you DQ. But the irony of you posting that is off the scale.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
#7 Re: Teres bearing
I have loads of delrin rod knocking around, i use it to make replacement thrust pads for lenco bearings. The original thin nylatron material is no longer obtainable under that name, or if it is ive not found a source. it is probably available under some other name.
But delrin is readily available and turns very nicely you can get a lovely surface finish when facing the side the ball will sit on. I prefer it to the practically always ruined original pads
But delrin is readily available and turns very nicely you can get a lovely surface finish when facing the side the ball will sit on. I prefer it to the practically always ruined original pads
- IslandPink
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#8 Re: Teres bearing
I don't think it has teflon in it, Paul. Here's the blurb :
https://en.wikipedia.org/wiki/Polyoxymethylene
Delrin as a trade name is mentioned in the first paragraph, and in the third paragraph of 'development'.
It would need to have fluorine in the structure to be a teflon variant.
https://en.wikipedia.org/wiki/Polyoxymethylene
Delrin as a trade name is mentioned in the first paragraph, and in the third paragraph of 'development'.
It would need to have fluorine in the structure to be a teflon variant.
"Once you find out ... the Circumstances ; then you can go out"
#9 Re: Teres bearing
I think delrin is the 3m trade name, its also known as acetal from other suppliers
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#10 Re: Teres bearing
Looking at the Teres manual…. The thrust pad is Delrin (I know it’s a novel concept to read instructions ). Looking at their sectional drawing I am unclear where the metal disc goes. https://www.vinylengine.com/library/teres/bearing.shtml
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#11 Re: Teres bearing
If I had read the instructions fully the Delrin thrust pad is meant to be bonded onto the metal backing plate.
- izzy wizzy
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#12 Re: Teres bearing
I seem to have an early model before the delrin disk embedded in the brass plate. First brass plate, then delrin disk, then the combined thrust pad.vinylnvalves wrote: ↑Sun Jun 25, 2023 6:43 pm Looking at the Teres manual…. The thrust pad is Delrin (I know it’s a novel concept to read instructions ). Looking at their sectional drawing I am unclear where the metal disc goes. https://www.vinylengine.com/library/teres/bearing.shtml
Took about 6 hours for bearing to sink home. Looking forward to tunes this evening with no scraping noises hopefully.