ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Well, after months, years of unfructuous research, I finally came across a seller who was selling Beogram parts, and I just tried my luck and asked him if he had this one. He did!
For some reason, it was covered with superglue when I got it, it looked in a sorry state. But for €5 including P&P, well...
Anyway, the material B&O used was acetone resistant (Nylon?) and I was able to restore it completely to its former condition.
Out will be the Meccano pulley then, and in will be the real McCoy, finally!
Isn't eBay wonderful, sometimes?
Happiness is made of little things like this
Three cheers to the first one who finds the name of the deck!
Jacques
4002? There are a number of sizes!
Peter
Peter: 4002? There are a number of sizes!
Nope. The smaller half-moon hole should give the game away!
My two Beogram 4200's had black pulleys made of cheap plastic.
Are we talking about this one , good find Jacques, anytime you need nylon wheels, send me dimensions and I make them for you.
Collecting Vintage B&O is not a hobby, its a lifestyle.
You win my Mexican friend! This very one indeed. Can you machine pulleys for half-moon shaped axles?
Hey, where's the tuner?
chartz: You win my Mexican friend! This very one indeed. Can you machine pulleys for half-moon shaped axles? Hey, where's the tuner?
I can make pulleys with a round axle hole, with a grub screw that tightens to the flat part of the axle.
Søren Mexico: I can make pulleys with a round axle hole, with a grub screw that tightens to the flat part of the axle.
Tried that on the BG 4000 (Meccano pulleys, various shapes and materials, with grub screw and shim), and I could never have the pulley turn correctly. It keeps wobbling ever so slightly.
Trouble is, the axle is very thin, unlike that of the later 6000/4200/4400 Beograms (round axle, larger diametre).
The original moulded pulley is very sturdy and of course it fits perfectly.
chartz: Trouble is, the axle is very thin, unlike that of the later 6000/4200/4400 Beograms (round axle, larger diametre). The original moulded pulley is very sturdy and of course it fits perfectly.
You are right about that, with small axle diameters the problem is the grub screw getting too big for the axle hole, the screw has to be machined with a smaller tap and the hole made accordingly where the screw/tap connects to the axle, I would make a brass center to the wheel to stabilize it.
Well, I'm glad you found yours, fabricating one will be time consuming with the tools I have here.
chartz:Tried that on the BG 4000 (Meccano pulleys, various shapes and materials, with grub screw and shim), and I could never have the pulley turn correctly. It keeps wobbling ever so slightly.
What's the problem with it wobbling? It doesn't have a direct relation to anything that you could hear. Keep the cover on and be happy
--mika
Well just the satisfaction of perfect mechanics you know Mika.
But true, it's been working like that for two years!
By the way, this is what I had come up with:
This solid brass Meccano pulley has the same diametre as the plastic pulley, but the groove is deeper, leading to a slightly different speed.
I had to machine the central cylinder and thread it for the screw, which had to be big to press against the flat part of the axle.
Well, it worked...