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Use SpaceBalls for Wire Retention in Aluminum Extrusions

A really simple technique for running wires through the exposed slots on T-slotted Aluminum Extrusions.

For 20mm x 20mm Alum. Extrusions, 0.26" rubber Spaceballs panel spacers are cheap and perfect to hold in wires. Designed to eliminate rattle paneled doors, find them for ~$5 per 100 on Amazon or most Woodworking sites.



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Place every 4"-6" for long wire runs


Separate the wires with a pair of tweezers and slide in the Spaceball