Chief Delphi - Attatching an axel to a wheel

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- - Attatching an axel to a wheel (http://www.chiefdelphi.com/forums/showthread.php?t=40453)

Jason Kixmiller

17-11-2005 19:29

Re: Attatching an axel to a wheel

Quote:

Originally Posted by Zoheb N

Do you know of any other ways of attatching the axel to a wheel. It doesn't have to be an easy way.

This would depend largely on the material that your wheel hub is made of. Plastic of poly-carb. hubs can be "sandwiched" between two discs that securely fit around the spokes of the wheel (try looking at the "wheel-chair wheels" from past years), then attach the metal discs to the axle by any of the previously mentioned methods (pin, key, WELD!)

If the hub is metal, the wheel hub can be directly broached or pinned.

David Guzman

08-12-2005 01:27

Re: Attatching an axel to a wheel

Quote:

Originally Posted by Cuog

My prefered method is a hex shaft while hardest to build it has the best long term benefit=== I have never sheared nor seen a sheared hex shaft, they can snap like any other shaft but they are i beleive the strongest.

While keyways are nice they have flaws such as loose keys and the key exploding since all the torque is applied at that one point

For practicality i would use a similar method to that which secures the tires to the axles of your car, there are four to eight pins which are parellel to the shaft and are inserted into the wheel, very strong(it can withstand whatever you car dishes out and i challenge you to build a competition legal robot that dishes out more torque than my 1979 Trans Am, so much that it can snap through and average hub built correctly and like i described)

Does anyone know of any place where they would sell gears with a hex bore in them?

Cory	08-12-2005 01:41

Re: Attatching an axel to a wheel

Quote:

Originally Posted by David Guzman

Does anyone know of any place where they would sell gears with a hex bore in them?

If you want to buy from AndyMark, they have limited tooth count selection of hex bore gears.

I can't recall ever seeing any from a major supplier that are hex bored, however.

MattB703

08-12-2005 07:49

Re: Attatching an axel to a wheel

Many tool supply places will sell hex shaped broach tools. If you have an arbor press in your shop it may save you some money in the long run to have the broach tool and just buy standard gears.

Doug G

08-12-2005 14:02

Re: Attatching an axel to a wheel

Quote:

Originally Posted by David Guzman

Does anyone know of any place where they would sell gears with a hex bore in them?

A good undersized 1/2" Hex Broach retails for a few hundred dollars, and since you won't use that often, I'd suggest just finding a nearby machine shop with broaching capabilities and ask them to do it. We've done this before and they've been happy to help. We've also managed to get a broach donated, so we can now do it ourselves on our press, be we've only used it once.

David Guzman

08-12-2005 17:05

Re: Attatching an axel to a wheel

Thanks every one for the input. We were actually thinking of making the hex with a CNC mill. It would have a fillet on the corners but we think we can put the same fillet on the shaft using a lathe. What do you guys think about this?

Dick Linn

12-12-2005 13:43

Re: Attatching an axel to a wheel

The last few years, we've just used Skyway wheels with a 5/8 keyed bore, and 5/8 shaft with a keyway already cut (MSC). We typically use a bearing on each side of the wheel/sprocket (pillow block arrangement), with split shaft collars outboard of those to prevent the axle from moving laterally. Simple, strong, inexpensive and requires no machining. Only a little sanding occasionally if things are too tight. We have relied on those aluminum pillow block housings that were used in the kit or available for several years, so now we might have to have some machined if we can't find them.

Amazing how working in a wood shop can reduce your machining requirements.

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