Ball Bearing Speed Reducer

[Neil WyattModerator @neilwyatt]

Thanks Jacques,

Confirms my thought that the performance can be improved with a second bearing, but doeas appear a touch over-engineered.

It would justify the price of top end telescope focusers if they had that complexity!

Neil

[Swarf, Mostly!Participant @swarfmostly]

Hi there, all,

The start of this thread reminded me of a gizmo described in the trade press back in the 1970s, the 'Cyclo' speed reducer. I've been a bit busy being festive for the last few days but I found time this morning to root out the demonstrator I received back then in response to my ringing the appropriate number on the magazine response card.

Here are a couple of photos of the demonstrator:

and here are scans of the accompanying leaflet (I'm sorry but I can't offer a translation):

Here's a YouTube video with an animation showing the operation of the device:

**LINK**

Best regards,

Swarf, Mostly!

[RobinParticipant @robin]

Is that blue and grey thing a harmonic drive? I had to buy one of them just so I could take it apart and see how it works. A bit like Sylar if you remember him. Darned things are about the same age as me but I'd never heard of them.

Fascinating gizmo, looks like an epicyclic box but does 50:1 in one stage and the output goes in the opposite direction to the input

If you want to do a Sylar you are welcome to borrow it.

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