Friction in Stanton STR8-30 Turntable

You need to figure out where it is catching. If it is the underside of the platter catching on some part of the chassis or motor, then the centre bearing has sunk for some reason. I had a similar problem some time back, when a deck that I had in for repair ( can't remember what make ) had a ball bearing in the bottom of the bearing tube, that the bottom surface of the hardened shaft ran on. The lube had dried out, and the hard ball bearing had worn into the soft brass that the tube was made from. Relubing, and replacing the ball bearing with one of a larger diameter, cured the problem.

Arfa

Thanks for the help. This is my first time trying to do any repairs on a turntable, so I just want to make sure I'm clear on where I should be looking, and that I've got the terminology right...

On this turntable, once I remove the platter, the top of the casing (the chassis?) is more or less entirely closed, except for a hole that the spindle comes through. So to access the bearing tube or see the motor, I have to unscrew and remove the casing. If this is correct, are there any precautionary steps I should take before opening it up?

Thanks aga> wrote in

messagenews: snipped-for-privacy@i56g2000hsf.googlegroups.com...

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There shouldn't be any particular issues that I can think of, other than just good servicing practice. Things such as noting the screw types. Often, screws will be of different types and lengths e.g. quick-threads for plastic, machine screws etc. Just note where they come from if there are any different types. Separate the case halves carefully, and if you do have to disturb any bits of mechanism, draw a picture before you do. An indelible felt tip is often handy for just putting a quick stroke across pieces of mechanism, just to remind you how they were when you started ... Use either old 35mm film pots, or egg cartons to store the screws etc.

Have you got an idea yet of what is dragging ?

messagenews: snipped-for-privacy@i56g2000hsf.googlegroups.com...> Thanks for the help. This is my first time trying to do any repairs on

other than

snipped-for-privacy@gmail.com ha escrito:

remember to remove the pickup cartridge and tape down the arm before turning the deck over!! New styli don't come cheap. put on a soft cloth or cushion if working with it upside down.

-B.

Does this turntable have any suspension or isolation using springs? When you push on the platter itself does it move independent of the base? If it does the chances are the suspension springs have simply weakened with age and need to be replaced. The turntable itself may have dropped so low it's scraping on the mounting base in one particular area.

Rick

Thanks for all the advice, folks.

So - I did get it open (having removed the cartridge and locked the arm) and found that a very small washer-like item had cracked and the pieces were stuck to the magnetic disc that surrounds the spindle. These pieces were grating against other pieces of the mechanism.

I removed these pieces, reassembled the turntable, and now it works with no problem. However, it's now of course missing a washer, and I suspect this is not ideal for the long term health of the turntable.

This washer (when whole) was not a complete circle - rather, it was about 2/3 of a circle with three very small tabs inside the curve. Any ideas what this piece is or how unadvisable it is to continue using the turntable without it?

Thanks.

Rick wrote:

A 'washer' of this description is actually a form of circlip. Its purpose is to retain a shaft somewhere. Could be from the bottom of the tone arm lifter shaft or somewhere similar. Look for a shaft a little larger in diameter than the gap between the 'tabs', then check if it has a groove cut around it. That will be where the clip belongs. If you can't readily obtain one, you can achieve the same result, by wrapping a piece of stiff wire ( like a resistor leg ) with a larger diameter than the width of the groove, around the shaft, and in the groove.

Arfa