MechMate CNC Router Forum

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-   Driving Mechanisms: Rack/pinion, gears, screws, belts & chains (http://www.mechmate.com/forums/forumdisplay.php?f=24)
-   -   Using a chain for a rack (http://www.mechmate.com/forums/showthread.php?t=3827)

Mr Ron Sun 24 June 2012 15:38

Using a chain for a rack
 
Using a chain is a common means of moving a trolley along a rail. The chain is tack welded to an overhead I-beam and a sprocket that is inside the trolley engages the chain. As the sprocket is turned, either by power or manually, it traverses the chain in rack fashion. My question is; can a chain be used in place of a rack for the rack and pinion drive? Racks are very expensive.

Quadro Sun 24 June 2012 16:01

Mr Ron,
It has been done and wasn't very sucessful. See this build #62.

Zouave Mon 25 June 2012 08:09

In comparison to the rest of the build, I think the rack is one of the less expensive and more important parts.

It really isn't much off a savings to go with a chain, and your performance will suffer.


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