Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: corrado33 on October 17, 2009, 04:08:39 PM

Title: How to make sure your wheel hub is centered.
Post by: corrado33 on October 17, 2009, 04:08:39 PM

Just as the title states, what's the best way to make sure the hub you're putting on your wheel is PERFECTLY centered?  What if the hole in the wheel is bigger than the hole in the hub?  (Meaning you can't just shove a shaft through both of them to line them up.)

Thanks in advance.

Title: Re: How to make sure your wheel hub is centered.
Post by: Joker94 on October 17, 2009, 07:33:12 PM

my hub has 3 screws that screw in around the shaft to centre it. The may be a viable solution.

Attached is a diagram of what it looks like.

There is one of the collars on each end. and it does not take up much room.

Title: Re: How to make sure your wheel hub is centered.
Post by: corrado33 on October 17, 2009, 08:37:32 PM

I think I understand your idea, however I don't believe it'll work for my application, plus I'm trying to avoid buying parts I don't need (aka the collars).  Thanks though!  :)

Title: Re: How to make sure your wheel hub is centered.
Post by: Joker94 on October 18, 2009, 01:19:41 AM

Well the only other thing i can think of would beincreasing the diameter of the shaft by using metal tape, but that may not work as the tape may be to delicate. Or there may be some other way to increase the diameter of the shaft.

Another idea i just had is measure the gap/space between the hub and the shaft, and then weld on some wedges to the hub to centre the shaft. The wedges would only be short stubs and would only have to be tacked on. Picture is attached. you may get a better result with 4 tabs instead of 2.

These ideas may not be practicle or possibe for you.

Title: Re: How to make sure your wheel hub is centered.
Post by: ArcMan on October 19, 2009, 08:29:12 PM

In an ideal world (one with a metal lathe), the hub would be machined with a shoulder with a diameter equal to the wheel's bore.
Before I got my lathe, though, I used the tape idea mentioned previously with success.