Shaft adapter for motor

[petn7]

How does one attach a 1/8 or 3/16 stainless steel shaft to a motor with a 2.3mm or similarly sized motor shaft?

[crazy ivan]

The simplest way would be

The simplest way would be with a Dumas style dogbone coupler. This takes care of any misalignment between the motor and the shaft. Mike's Subworks carries them:



They are available in 1/8" to 1/8" and 1/8" to 3/16" shaft sizes. You would then reduce the motor end down from 1/8" to 2.3mm (about .090") with a sleeve. A piece of 1/8" K&S brass tubing would be close for a sleeve, although the .007" slop might be too much. To get tighter might require you to machine the sleeve yourself from solid rod.

Another alternative style coupler is available from Harbor Models]http://www.harbormodels.com/site08/main_pages/propulsion.htm[/url]

These can be had with 2.3mm on one end and 1/8 or 3/16 (as well as other sizes) on the other end.



also



This one is 2.3mm and you would drill out one end to your size.

Of course, if you are cramped for space (and who isn't!), then you might not have room for the coupler. In that case, things can get more complex in a hurry.

[petn7]

Wow, that link to the

Wow, that link to the coupler is key!

But yes, I am cramped for space. However, it might be work using the coupler...I'll do some experimenting.

First, I will cut a slit on the end of the stainless steel shaft, like the end of an arrow. I'll then somehow center the motor shaft in the middle of the slit, then hold it all together with JB weld.

I think what I will do second is try to find someone to bore out a 1/8 or 3/16 stainless steel shaft with a 2.3mm hole then JB weld the motor shaft inside the hole.

[redboat219]

I suggest using a length

I suggest using a length of silicon fuel tubing.

[tsenecal]

you might also look at

http://hobby-lobby.com/ujoint.htm

you might also look at

http://hobby-lobby.com/ujoint.htm

[petn7]

I found a very simple

I found a very simple solution (from redboat's suggestion):

1. Take 1/16" silicon tubing and slide it over the motor shaft
2. Take 3/32" silicon tubing and slide that over the 1/16" tubing already on the motor shaft.
3. Slide the 1/8" stainless steel shaft into the open end of the 3/32" silicone tubing.

Ta-da!

Now for some testing in a few weeks...