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stefano.antonelli
08-27-2007, 04:50 AM
My question may be very obvious but I cannot found an easy answer by myself so I will try the forum.

How can I fix a Colson Wheel mounted on a hub with keyway on a motor shaft?

I suppose that I should use a steel key, cut it to correctly fit the wheel's hub and than fix everything with two collar to keep the wheel in place.

Am I correct ?

If I am using a hub without keyway, how should I fix the wheel to the shaft?

Stefano

Matt
08-28-2007, 03:22 PM
I'm assuming you are working off this page?
http://www.trossenrobotics.com/store/c/2894-Colson.aspx

To answer your question, yes, you want to use collars to hold the wheel in place. We have lock collars here:
http://www.trossenrobotics.com/store/c/3119-Lock-Collar-and-Shaft-Keys.aspx

We should cross reference them in the catalog to help shoppers out. We will make a note of it.

Dave
08-29-2007, 11:50 AM
If you're using an unkeyed hub, there isn't an easy way to secure it to the shaft. If you're using a keyed hub, a standard 1/8" square key will have to be filed down to fit. Collars work well for fixing the wheel in place. If the shaft has a tapped end, a collar on the inside and a screw and washer on the end of the shaft also works.

stefano.antonelli
08-29-2007, 12:08 PM
Hi Matt and Dave,
thanks a lot, now I have a clearer idea.

A small guide about how to mount wheel in the site will be of great help for people like me that have a software background and lack of mechanics knowledge.

One more Question :-)

Will it be possible to use the following mounting hub:

http://www.trossenrobotics.com/store/p/3564-Mounting-Hub-6mm-pair-.aspx

to mount a Colson 3''x7/8'' wheel on a BaneBot GearMotor 28mm 5:1 (6mm shaft)?

thanks again
Stefano

Dave
08-29-2007, 05:43 PM
Will it be possible to use the following mounting hub:

http://www.trossenrobotics.com/store/p/3564-Mounting-Hub-6mm-pair-.aspx

to mount a Colson 3''x7/8'' wheel on a BaneBot GearMotor 28mm 5:1 (6mm shaft)?


This hub would work better:
http://www.trossenrobotics.com/store/p/4276-Wheel-Hub-Colson-7-8-Wheel-6mm-18-Broach.aspx

It was designed to work with the wheel/motor combination you're looking at. Granted, as I stated in my previous post, you'll still need to grind down a standard 1/8" key to make it fit. We provide 1 key for each hub ordered.

The hub you linked to wouldn't work for very well. The hub is meant to mount to the side of a wheel (via the ring of screw holes in the hub). You'd have to drill screw holes into the side of the wheel. This wouldn't be a big deal, except that the ring of screw holes is just barely larger than the bore of the wheel, so the screws wouldn't have much plastic to bite into.

Your order shipped out a few hours ago, by the way. I hope you didn't order the wrong hubs :(

stefano.antonelli
08-30-2007, 06:27 AM
Hi Matt,

My order should be OK, moreover I decided to try different wheels so I will have different wheels/hubs to try.

thanks again
Stefano

darkback2
02-12-2008, 11:37 PM
I have had pretty good luck using the 2 inch wide colson wheels. I drill 2 holes down through the wheel at opposite ends. I then take a piece of 1 3/8ths inch oak rod, drill out a 7/8ths inch hole down the center of the tube and glue in an aluminum mounting hub using supermend epoxy paste. I then drop a couple of wood screws down through the holes in the wheels. I know this is a ton of work...and there is probably a cleaner looking solution, but as a school teacher on a budget...this is the cheapest way I have found to support robots weighing 30 lbs or more.