Jockey wheel coupling query

[Al (astral highway)]

I’ve trawled through the forum on a mobile device but can’t find a specific answer to this Q.

Garrard AT6 deck jockey wheel: I’m still working on this and am curious - once the wheel is ‘restored’ ( OT for this thread) , I note that the wheel only grips the drive spindle by push-fit pressure and a circlip.

So unless I’m missing something, why doesn’t it just slip, wasting energy on the coupling between the drive spindle and jockey wheel, once the inside perimeter of the platter is engaged? Or is it designed to slip and the slippage acts as a ⚙️ gear? The circlip is only a retaining measured and doesn’t clamp the jockey wheel.

If it isn’t supposed to skip, what’s a good fix?

If there’s an appropriate thread I’ve missed, no worries.

[ms660]

If everything's in shape then normally it won't slip, that's due to the pressure applied by the spring.

Lawrence.

[Al (astral highway)]

Ahah, thanks ! so if it is slipping ?

Superglue ? ⚙️😅😯

[Nuvistor]

From memory, ok not that good, the direction of the rotation pulls the jockey wheel against the the spindle and rim.

[Al (astral highway)]

Hi Frank, so you (and Lawrence ) mean it’s supposed to slip until that sideways pressure is applied?

[ms660]

Originally Posted by astral highway

Ahah, thanks ! so if it is slipping ?

Superglue ? ⚙️����

The idler wheel, the arm it's on, its engagement mechanism, the spring or springs etc etc and the idler wheels presentation to the stepped motor pulley (stepped pulley must be secure to the motor shaft) and the platter must all be ok for proper operation.

Grease/oil....should be where it's supposed to be and nowhere else.

Lawrence.

[Al (astral highway)]

Originally Posted by ms660

Grease/oil....should be where it's supposed to be and nowhere else.

Lawrence.

.

Indeed: I cleaned it in an ultrasonic bath and the perimeter with a solvent. I cleaned the spindle with a solvent.

The appropriate parts only of the deck and mechanisms have been degreased from old funk meticulously and regreased selectively with lithium grease.

I’m still not clear: would it be appropriate to fix the wheel permanently to the spindle or is it supposed to slip until the appropriate mech is engaged?

[Edward Huggins]

I don't think you seem to have much faith in how the (tried and tested) pressure exerted by the inner rim of the turntable onto the Jockey (Idler) wheel and the Stepped Spindle works?

[Nuvistor]

Hadn’t seen Lawrence’s post, apologies Lawrence.

If you fix the jockey wheel to the spindle how would you change speeds on the stepped pulley.

Have you seen this thread, scroll down to the relevant section.
https://www.vintage-radio.net/forum/...ad.php?t=75401

[Al (astral highway)]

Originally Posted by Edward Huggins

I don't think you seem to have much faith in how the (tried and tested) pressure exerted by the inner rim of the turntable onto the Jockey (Idler) wheel and the Stepped Spindle works?

Haha! That’s (was) right ...I get how the jockey wheel and inner rim of the turntable are coupled, but the slipping jockey wheel , well , that’s not exactly intuitive. And the process can’t be watched. I’m beginning to get it now, but there’s a learning curve with these mechs and their subtleties.

[Michael Maurice]

The only cure is either a new or restored idler wheel. Nothing else provides a permanent cure.