dident know where to put this so i thought i would put it here i guess

http://www.emachineshop.com/

its a company that has a free cad drawing program thats linked in some method to its website and basically you choose your materials you want it made outta you draw it up the program gives you a quote and you can order it then and there dont know how it would go havent tried it just found it while looking for parts
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Just had a nutty idea...
Emachine shop is an American online machineshop and you use their special software CAD program to make up your part and it gives you a price instantly.I was talking to Nick yesterday and he got slash's weapon shaft and stuff done by them, and seemed happy with the result. At the moment we all mod things in robots and usualy this involves either alot of wasted time or someone getting alot of $$$... Just one idea is some sort of design for a wheel hub to suit drill shafts... one that could easily be stuck into a red wheel. Whats interesting is although one off componants cost a fair bit, ordering more drasticaly reduces this one off cost. eg. on their pricing page, a little ali part milled out costs $124 american for one, however for ten the price ea drops down to $14 American! And if you wanted 1000 it goes down to $0.58!
Just one of my thoughts lol
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Not a bad idea - money can also be saved by leaving out easy hand tool jobs and doing yourself. The question is: how many to order? Fifty sounds about right to me for a year's supply
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order 2000 they start paying you
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Indeed... I can't really use their program well enough at the moment though, so I wouldn't have a clue how much they'd cost
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we looked at making something like that without CnC and it worked out cheaper just to make the wheels.

Only upside is that the red wheels are a "throwaway item" so provided your hub isnt owned as well its possible, hard part is grabbing the red wheel without busting it or needing a longer shaft in the drill
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Mechanical engineers build weapons, civil engineers build targets

I have that covered - just need a red wheel to take some measurements. If a quantity order can get a simple hub down to (say) $5 each, then an entire wheel with hub and some attachment screws would be only around $10. Its not a good as a custom urethane wheel, but the tread part is disposable and can be replaced many times.

Does anyone know what the thread size is on the left hand locking screw? It looks like 10-32 UNC to me...
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sadly i think you are right wrt thread size
i'd have to check the tap but yeah.
(sad in that you guessed it, sadder still that i rembered)
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Mechanical engineers build weapons, civil engineers build targets

No guessing involved - I measured the diameter with a known 10-32 screw, then compared the thread pitch. It might be M5 but it's a remote chance and no other thread type is close to 10-32. I just found that a replacement LH screw is exorbitantly expensive at $ 8.20 each, so one of my ideas to cut eMachine shop costs won't work. The cost can still be cut dramatically by doing some of the thread tapping over here and there are plenty of other options I found for minimising their costs.
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After some doodling in the eMachineshop software, it looks like the total cost for a red Bunnings wheel with a solid aluminium hub will be around $18 AUD, which includes the wheel, hub and 3 mounting screws. The red wheels are not a great choice for mounting hubs, as the ribs and center have to be machined off on one side.


It would be cheaper to import 3" by 7/8" Colson wheels and get hubs made for them by eMachine shop. The cost per wheel drops to around $14 and the combination would be lighter.

The question is: how many people would buy wheels at around $14 each? If I couldn't sell 50 in a reasonably short time, its not worth doing.
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Simple Solution! Talk to Andrew A. He makes 4140 steel inserts that thread straight onto the shaft of the drills and are basically a metal version of the plastic insert on the red wheels, keyed part as well... Philip scored 2 metal ones for $8....

LOL, You guys always look at the hard way of doing things What next, 3mm Titanium battery boxes
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None for me thanks, I can keep the std red wheels on these days.

OK Arron, foget I ever tried to help anyone by putting $400 down to get something made in volume. I designed the same part you would get from CNC bot parts and made it almost 1/2 price. How's that doing it the hard way?
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quote:

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Originally posted by TDT:

LOL, You guys always look at the hard way of doing things What next, 3mm Titanium battery boxes

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www.cncbotparts.com

the colsons i would say are the best wheels for drills along side jakes ones (which i prefer cause they are one piece and smaller.) they arent that expensive either.

and the blue wheels aaron send me are great too, colson style and where like $5 each
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