A chain whip is a bike tool. Here's how to make one.

Step 1: Find the Parts

- You need a sturdy round bar or flat bar. I used a smooth round bar a got from the rails of an old printer. The longer you use the more leverage you'll get. About 12" will work fine.

- Some old bike chain. 12" or so will work fine. I find that the farther you wrap around the gear the better the chain holds.

- A welder or POSSIBLY you could put a hose clamp around the end and the middle to secure it. If using a flat bar, drill and bolt it.

Step 2: Assembly

Pictured below is a commercially made chain whip. I find that my method works fine too. But 5-10 chain lengths over 3"-4" should work fine for the "secured" portion. Simply leave the rest unattached.

http://bicycletutor.com/replace-cassette-cluster/ shows a chain whip in action.
To eliminate any confusion, this is a&nbsp;TOOL&nbsp;used to tighten and loosen threaded <a href="/wiki/Sprocket" rel="nofollow" title="Sprocket"><font color="#002bb8">sprockets</font></a> on a <a href="/wiki/Bicycle" rel="nofollow" title="Bicycle"><font color="#002bb8">bicycle</font></a>. NOT&nbsp;A&nbsp;WEAPON. It is called a chain whip because it has a short section of <a href="/wiki/Chain" rel="nofollow" title="Chain"><font color="#002bb8">chain</font></a> used to grip the sprocket&nbsp;<br /> <br /> <a href="http://en.wikibooks.org/wiki/File:Chain_whip_tool.jpg" rel="nofollow">http://en.wikibooks.org/wiki/File:Chain_whip_tool.jpg</a>
good point, help explain this to these confused people!
&nbsp;This isn't exactly a good idea. &nbsp;Check your local laws and regulations before building this. &nbsp;You might also need a permit in some areas and it might be against the law to use it in other areas. &nbsp;I know that if the police catch you with this in Phoenix, Arizona, United States, you WILL go to jail and face a good amount of prison time and possibly a hefty fine. &nbsp;Whatever you do, USE COMMON SENSE!
&nbsp;This is really dangerous!!!!!!
Since the author does not, here is a picture explaining the use of this tool:<br/><br/><a rel="nofollow" href="http://en.wikibooks.org/wiki/File:Chain_whip_tool.jpg">http://en.wikibooks.org/wiki/File:Chain_whip_tool.jpg</a><br/>
for the record, this is a tool used for removing large bolts and such for the ignorants who only think of this as a fun way to remove flesh, it is is ALSO a tool!
This is also a weapon! If you remove the chains, you'll have a club, and you can whip people with this. THAT will definitely HURT. Good job!
Watch out, this could do real damage. I think you need more pictures though

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