Homemade Linear Actuator

Linear Actuator
Andrew Lewis on makeprojects.com
Homemade linear actuator fabricated from a sewing machine bobbin. A 38 SWG, enameled, copper wire is wound on the bobbin to form a coil. The bobbin is wrapped in PTFE and a small plastic disk is glued to the bottom. A magnet is glued to a plastic rod and a small, copper spring is epoxied to the magnet. The spring/magnet/rod assembly is fitted inside the bobbin center.
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1-2 of 2 comments
DIYer says:
Apr 11, 2014 7:15 PM
I don't have a project that requires this, but what a great contribution!

daveward says:
Oct 20, 2013 10:53 AM
How brilliant.  Does your wife know she lost 32 bobbins???

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