This instructable is an addendum to the previous one, and documents a lot of improvements I made to the original project.

Step 1: Add a Switch In Line

I sliced one of the power cables and put a switch in the middle.

Now I can turn the gollerblades on and off.

Step 2: Replace the Wire Brush with a Urethane Wheel

I got this wheel from my local hardware store (they have *everything*).

First, I drilled out the center of the wheel to make it fit over the threads of the angle grinder.

I also bought an angle grinder nut to hold it on - they're a little pricy. I could alternatively have salvaged the nut from the wire brush.

The wheel had a curvature that prevented any threads from being exposed above it, so I flattened it a bit with a hammer.

Also, I noticed that if the wheel wasn't pressing against ground, it tended to stretch and fly off the wheel quite a bit.

As you can see, the urethane deforms a lot.

Fortunately, this wasn't a problem.

Step 3: Use Bicycle Innertube for Lashing

Last time I used duct tape. Not a flexible or reusable material. If you want this project to be permanent, use something sturdy and reusable, like these handy strips of rubber (available free at every bike store)

Step 4: Film Yourself [video]

An have a rocking good time, whizzing around a parking lot with your friends.

Motorized roller-hockey?

The switch was definitely wonderful to have, the bike tubes quite convenient.

On the other hand, I learned that urethane grips less-well than a wire brush,. Also, with the actual wheel, I did not go as fast as I did with the wire brush. Possibly a bigger, heftier wheel would do the trick - or I'll just stick to the wire brush.
cool :P
This reminds me Air Gear :D I am making a project like that too :)<br /> <br />
This looks much safer than the first one... However, I still would think that the batteries would be as heavy as lead... ... Wait a minnit...
My inner Mad Scientist just unleashed a frighteningly evil laugh. I'm seeing the grinder dissembled further and attached in an under slung position along the rail... The mantra of mad scientists everywhere, "power's a bit of a problem, though."
I think the slower speed is most likely because you're not getting enough torque for the larger wheel radius. Some reduction gears should remedy that. Or, if you're willing to try taking apart the grinder, you might find some gears you can just remove, or perhaps replace, to adjust the ratio.
I do a lot of welding. Every Grinder I have [3or4] turns at 10,000+ rpm - you want bigger wheels for more speed. There is enough torque to rip the grinder from your hands if you don't have a good grip on it !!!
Nice, im planning to make some too. <br/>Can you upload a better video though? one thats not in the dark so we can see how to stand when using etc.<br/><br/>Thanks for making this by the way =]<br/>
or you could permantly attach the grinder to a wheel of the old style 4 wheel roller skates ? this looked cool except for the speed (or lack of). though you wouldnt want too much in case you fell :O Now im having visions of 2 angle grinders each attached to a wheel on either side of a wooden platform that you can sit on (wide skateboard?). ....
How long can you go before the batteries run out?
Commercial Go-llerblades hitting the <a rel="nofollow" href="http://www.dailymail.co.uk/pages/live/articles/news/news.html?in_article_id=472044&in_page_id=1770">news</a><br/><br/>L<br/>
also...filming during the daytime....really good idea hehe
The link on step one links to your "edit" page, not the part 1 instructable. Just a heads up...
Thank you!

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Bio: Hi! I'm Star Simpson! I'm a real me! See more at [http://stars.mit.edu stars.mit.edu]. photo by [http://bea.st ... More »
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