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Schaferhunde

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Jan 12, 2021
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Does anyone know why the 3 ball bearing clocks have banking pins, Shenton states with the 2 ball to stop the balls jamming in the plate?
My interpretation is to limit the radial travel but with 3 balls I am at a loss to understand why?
Also the pins create friction on the balls.
 

wow

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Jun 24, 2008
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Does anyone know why the 3 ball bearing clocks have banking pins, Shenton states with the 2 ball to stop the balls jamming in the plate?
My interpretation is to limit the radial travel but with 3 balls I am at a loss to understand why?
Also the pins create friction on the balls.
I do not see any banking pins on mine. Can you explain where they are?

590BE8AC-225C-4B97-9DDC-ED639E846E70.jpeg D3C5037B-83BC-498E-BA75-B8AC76528786.jpeg F8123296-EA5B-435E-ACAB-0C1FA79AF89B.jpeg
 

Schaferhunde

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Jan 12, 2021
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I do not see any banking pins on mine. Can you explain where they are?

View attachment 659295 View attachment 659296 View attachment 659297
There are 2 brass pins, in the front and back of the bearing housing, the bearing housing is enclosed behind armoured glass, some clocks have 2 bearings and others 3 ball bearings. The banking pins will be hidden behind the 2 ball front metal plate.
With the 3 and 2 ball versions the banking pins sit just above the 2 lower balls.
 

wow

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Thank you. I see them. I do not know why they are there unless they keep the wheel from rotating past the contact wire twice on each rotation:???:
 

Schaferhunde

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Jan 12, 2021
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Thank you. I see them. I do not know why they are there unless they keep the wheel from rotating past the contact wire twice on each rotation:???:
No that's not the reason, I think all the bearing housings were fitted with 2 banking pins to save and simplify production costs, the only plausible reason is as Alan Shenton states and only for the 2 ball bearing clocks, to keep the balls from getting pushed out of their holes in the little front steel plate and jamming the movement. In my opinion the banking pins are irrelevant in the 3 ball bearing clocks. Please correct me if I am wrong.
There seems to be confusion relating to the bearing housing lubrication and tightening the lock ring.
The bearings should NOT be immersed in a pool of oil, but only wiped over with an oiled rag, a new paper gasket should be fitted
and the lock ring DOES NOT NEED EXCESSIVE FORCE TO TIGHTEN THERE IS NO NEED FOR PIN PLIERS, WITH THE PROPER LUBRICATION THERE WILL BE NO OIL POURING OUT BEHIND OR IN FRONT OF THE BEARING HOUSING, THE LOCK RING CAN BE TIGHTENED USING A STRONG PLASTIC NEEDLE POINT WHICH WON'T DAMAGE THE HOLES.
 

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