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Helicomatic bearing question

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Old 07-06-23, 12:47 PM
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WGB 
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Helicomatic bearing question

Rebuilding a rear and there seems to be no internal damage so hopefully it is worth the effort.

There were 12 x 5/32 bearings installed before but the grease had long ago turned into varnish so it turned very rough anyway. Bearings were nearly mint.

My question is: How many bearings did they have?

I can't find a reliable reference and the voices in my head thought 13 and not 12...🤔🤔. I'd rather not destroy it.
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Old 07-06-23, 12:53 PM
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Velobase says 13 per side in the rear.

https://velobase.com/ViewComponent.a...a2a30&Enum=110
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Old 07-06-23, 02:44 PM
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Thank you!

Now, is it best to run these with the full load or should I reduce by 1??
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Old 07-06-23, 06:06 PM
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I'd put as many hearings that can fit on the races so you can try to offset the undersizing of the bearings that Malliard did, when they designed the Helicomatic hub.
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Old 07-06-23, 06:31 PM
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The Helicomatic Museum site says 13, 5/32" bearings per side. https://www.borgercompagnie.com/helicomatic/specs.html
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Old 07-06-23, 06:44 PM
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Thank you all.

I went with all 13. It seems smooth.
Now I just need to fit it on a rim!
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Old 07-06-23, 09:46 PM
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I'm not convinced that the "full complement minus one" rule has any merit except to ensure you didn't use too many.
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Old 07-07-23, 07:54 AM
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Originally Posted by SurferRosa
Velobase says 13 per side in the rear.

https://velobase.com/ViewComponent.a...a2a30&Enum=110
Sutherland's concurs: 13 5/32" balls on each side.
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