Aluminum Tubing Connector Hub Dimensions

Lynxmotion Servo Erector Set
1

Hello to all!

It’s been a while. I have a question about the hub I mentionned in the title.

According to the 3D part on Alibre, the radius of the smaller tube coming out of the circle is 0.213 inches. Is this correct? It seems a rather odd number… a 213/500 inch diameter.

I want to connect the Ball Bearing Hub to a 3/8 inch shaft to drive a special wheel (in the pictures it looks solid enough to do this. Tyb’s Pico ITX Johnny five image seems to prove it can handle the load… I hope : forums.trossenrobotics.com/showthread.php?t=1312 ). I was going to try to use a shaft connector from servocity to connect two 3/8 to 3/8 inch shaft together. But now that I know it’s not exactly 3/8 I don’t know if I can manage to connect it together and still be able to get the shaft to be strait.

Thanks for reading

2

Hi Sam, where have you been! :smiley:

The HUB-08 has a 0.187" id and the part that fits inside the tubing is 0.425. The 0.500" aluminum tubing has a wall thickness of 0.035" and an od of .5" so it id is 0.430".

Hope this helps.

3

Thanks for the reply!

SAm

4

Does anyone know the flange thickness?

Thanks!

5

1/16"

You can turn the .418" hub OD of the flange down to .375" (3/8"), and allow a 3/8" coupling to slip over it.

Alternately, bore the 3/8" rod to take a 3/16" shaft, and add a setscrew. then the two can be joined with a piece of 3/16" rod. A little less strength.

Alan KM6VV