[Lab] Coaxial shafts...

[Ken McKinnon]

Discount Hobbies in Orleans (as I suspect most hobby stores would have) 
hollow brass tubes in various diameters from about 1/8" or so up.
Brass is pretty easy to work with..solders well or you could use two 
part eopxy to attach to your end parts.

Ken

On 2015-12-06 3:48 PM, Adrian wrote:
> Coaxial shafts...
>
> Alex,
>
> I want to independently rotate two or possibly three arms – like the 
> hands of a clock – and am looking for a “shaft within a shaft within a 
> shaft” assembly. Each arms is to be separately controlled by 360 
> degree servos (not continuous rotation) or steppers. Right now, I am 
> looking to see what’s available and so far I’ve drawn a blank.
>
> To your response, the Dremel only provides one shaft and I’m looking 
> for more. As for bearings, it would be a ball race or just cold-metal 
> (brass on brass)… I am still looking for possible ideas.
>
> Many thanks,
>
> ... Adrian
>
> *From:*Alex [mailto:alexbarbour at bell.net]
> *Sent:* 6-Dec-15 1:20 PM
> *To:* Adrian
> *Subject:* Re: [Lab] Coaxial shafts...
>
> Understand exactly.
>
> But what  are the dimensions  and what speeds and torques ??
>
> Could you  use flex drives  such as For Dremel  of Canadian Tire have  
> a cheepie  for $3.00    If You use these one must be sure to turn such 
> that the inner cable is tightened not unwound.
>
> Last alternative is to build your own   when the question 
> becomes:::       what of the inside bearing betweent the inner and 
> outer shafts ?
>
> Alex B
>
>     ----- Original Message -----
>
>     *From:*Adrian <mailto:adrian at woodsgood.ca>
>
>     *To:*lab at artengine.ca <mailto:lab at artengine.ca>
>
>     *Sent:*Sunday, December 06, 2015 7:05 AM
>
>     *Subject:*[Lab] Coaxial shafts...
>
>     Hello all,
>
>     I’m looking for a supplier of clock-like concentric shaft
>     assemblies to use for a large art display…
>
>     Ideally, I’m looking for two independent shafts (one inside the
>     other) on a common axis to convey two rotary motions from one side
>     of a baffle to the other.
>
>     Hope that you get what I’m after…
>
>     Any ideas please?
>
>     Many thanks,
>
>     ... Adrian (www.wooduino.ca <http://www.wooduino.ca> )
>
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>
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