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Hi All,Its been a while since I'd used my Gyro (Gyro SE, D.C. motor circa 2001), I'd previously been using a Technics SL10 (it's a real dream to use). Anyhoo, I fired it up (I had packed it away in its original packaging and so had to re-build it), and when I happened to put my ear reaaal close to the spindle, I could hear a light scraping sound. No worries, I'll ring Michell, get a new ball bearing, everything should be fine and dandy...
Wrong! The noise was still there. Maybe the noise was always there and I just hadn't noticed. Maybe in the intervening months I've turned terribly anal..
Well, Guys, I'm hoping for some perceptive rational explanation and quick fix. Advice welcome from all.
Regards,
Follow Ups:
Hi All,Many thanks for the insights. Previous to my original posting, I did as suggested, clean the bearing and replace the oil and ballbearing. The bearing housing (bronze) is approx. 2mm clear of the sub- chassis. I suspect the the bearing was duff from the beginning.
I shall ring Michell. I'm wondering whether the coned area inside the bearing housing where the steel ball sits,
isn't hundred percent, hence the attendent noise...Regards,
The noise might be from the bottom of the bearing rubbing against the sub-chassis. This is definitely possible if you have not sufficiently tightened the bearing spindle into the bottom of the sub-chassis.
Have you carefully examined the bearing spindle and housing for damage? I can't hear the slightest peep out of mine.If everything looks okay, you might try removing the oil from the bearing sump (soak it up with a paper towel or use a syringe), and flush out the bearing with a little lighter fluid in case there's some fine metal particles or dirt present.
Clean out the lighter fluid, flush it again with fresh oil, and refill the sump.
I flush mine out and check it about every 6 months if it has had heavy use....
But there isn't too much that can make a noise. The bearing is just a ball... the top of the spindle is flat.. or should be... so the last point of call would be the bearing housing.
Are there any signs or marks on the shaft or inside the bearing housing... they should all be lovely and smooth, like the day they were machined.So as Fretless suggests.... flush and fresh oil time.
Mobil 1 is the usual type of grade...and enough of it to get pumped to the top without the sump going dry.
According to Michell, it's Mobil 1 0W-40. By the way, if you contact Michell, could you find out what's the size of the ball bearing? I've e-mailed them twice and have not received any response. I am thinking about trying a silicone carbide ball bearing in my Orbe SE.
I found the size on my Gyro SE to be 5.5mm. I have just bought a silicon carbide ball from Boca Bearings. Haven't had the chance to try it yet.Cheers
I had contacted Artech, the US distributor, and he told me it's 7/32" diameter. But I thought the Brits use metric system, so it didn't sound right to me. I e-mailed Michell twice trying to confirm the info but never got the answer to this and also the length of the belt. I just did the conversion, so 7/32" = 5.55mm So I guess either one works.A friend of mine with a different turntable just switched and he swears by it now. I was just changing the bearing oil, so I thought I give it a try as well.
Be interesting to know how much difference and in what way... always worth a tweak. I shall see if anybody this end of the world does anything similar just in case.
.
...the north american Michell distributor. I've had good experiences with their tech guy (I think his name is Dave). Wouldn't surprise me if he knows the size of the ball bearing.
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