All you guys out there with Applied Fidelity bearings
73.201.46.192 |
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| Posted on September 21, 2016 at 21:39:59 | ||
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Posts: 7116
Location: Delaware Joined: August 5, 2001 |
a few general questions.... I think the ball used on these bearings is smaller than the shaft, but i have no positive knowledge of that. So if you know...which configuration is used?  the one on the left or the one on the right....or asking it differently, is the ball fastened to the end of shaft or the thrust pad is fastened to the shaft? The reason behind these questions is because i need to assemble a motor that Jim Howard could not finish for me. And as luck have it there are not to many people that can answer questions.... dee
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| Logic says the ball below would ride higher, the ball on top lower. Which way sits at correct height? nt, posted on September 21, 2016 at 21:54:56 | |
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| I know for sure, posted on September 22, 2016 at 06:00:51 | |
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Posts: 6828
Location: Glen Burnie, MD USA Joined: December 18, 2003 |
That my Denon DP-62L bearing job is the one on the left. I know it because I spoke to Jim about the problem he had with replacing the thrust pad at the bottom of the motor. He sent me photos when he was doing my bearing, showing me how he went about replacing the thrust pad. It required machining the bottom of the motor open so the new thrust pad could be properly mounted. IIRC that was necessary due to the new thrust pad's increased height (or something like that). He also had to machine the end of the spindle so the ball could ride there properly. My original main bearing was worn with the end of the spindle out of shape, the thrust pad had a dimple worn into its surface and the walls of the bearing needed machining. The symptom with my main bearing was a thumping sound. This was caused by the combination of the dimple in the thrust pad plus the worn end of the spindle. The ball would ride up and down slightly due to the uneven wear and cause the spindle to rise and fall slightly. When the spindle fell back into place it made the thump sound. This rise and fall also contributed to the wear on the bearing walls. Ed
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| Tubes liked to take pictures..., posted on September 22, 2016 at 06:12:03 | |
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Posts: 23900
Location: Central Kentucky Joined: December 20, 2000 Contributor Since: January 29, 2004 |
Jim liked to post pictures. Here are pictures of an original Technics bearing with the thrust plate attached like your picture on the left. Here is another one of Jim's posts with pictures. Here is another post that shows a configuration similar to your picture on the right. Some pics of SL-1200 bearing assemblies. Pictures of a new stock thrust pad! Good luck, John Elison
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| You're welcome! /nt\, posted on September 22, 2016 at 18:22:11 | |
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Posts: 23900
Location: Central Kentucky Joined: December 20, 2000 Contributor Since: January 29, 2004 |
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| SALUTE!, posted on September 23, 2016 at 13:26:12 | |
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Posts: 15387
Location: canyon country califiornia, orig from buffalo ny Joined: June 9, 2000 |
;^)
...regards...tr 
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| RE: Zebra , posted on September 23, 2016 at 17:33:28 | |
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Posts: 15387
Location: canyon country califiornia, orig from buffalo ny Joined: June 9, 2000 |
yup. just adding some levity here.
...regards...tr
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