Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: ArcMan on January 15, 2009, 03:23:37 PM

Title: Mounting Wheels
Post by: ArcMan on January 15, 2009, 03:23:37 PM

Does anyone have experience mounting these neoprene foam wheels to hubs?

http://www.lynxmotion.com/Product.aspx?productID=237&CategoryID=39 (http://www.lynxmotion.com/Product.aspx?productID=237&CategoryID=39)

I also bought the recommended hubs.  Can this wheel be disassembled and then the hub screwed and nutted to just the inside piece or do I need to drill through the entire wheel?

Title: Re: Mounting Wheels
Post by: frodo on January 15, 2009, 03:30:57 PM

can't you just superglue the hubs to the wheel centres?

Title: Re: Mounting Wheels
Post by: ArcMan on January 15, 2009, 03:47:41 PM

I don't want to go that way.
The hubs are aluminum.  Super glue (cyanoacrylate) does not form a reliable bond with metal.  Even if it did, that would eliminate any possibility of changing the wheels.
Thanks for the idea, though.

Title: Re: Mounting Wheels
Post by: pomprocker on January 15, 2009, 04:17:38 PM

The two halves can be pulled apart if need be

Title: Re: Mounting Wheels
Post by: Admin on January 27, 2009, 12:39:16 AM

http://www.societyofrobots.com/mechanics_chassisconstruction.shtml#wheels

Scroll down a bit until you see a pic of the wheel. I just drilled two holes and screwed in my servo hub.

(http://www.societyofrobots.com/images/mechanics_chassisconstservowheel2.JPG)

Title: Re: Mounting Wheels
Post by: ArcMan on January 27, 2009, 12:40:40 PM

Looks good as a servo mount.  Thanks, admin.

But I actually needed to mount it to a hub for a 6mm flatted shaft from a gearmotor.  Here's how I ended up doing it.  The Lynxmotion hub had a #4-40 threaded hole at the center and a #4-40 screw for bolting it on through the center of the wheel.  The problem is that the wheel hole size is a #8, not a #4.  Tssk, tssk.  Very sloppy, Lynxmotion.  So I bored and threaded the hub for #8-32.  The wheel fit very tightly on the #8-32 screw and was nicely centered.  I used a star washer on the outside and some threadlock to make sure the screw didn't back out.  Bootiful.