Build a Simple Test Rig for Prototype Parts

Start by defining what you need to test, such as load capacity, deflection, or cycle life. Sketch the essential loads and constraints. Use modular aluminum extrusion (like 80/20) for the frame; it is easy to cut and assemble with simple hand tools. This allows you to reconfigure the rig quickly for different prototypes.

For applying forces, consider using a hand-operated hydraulic cylinder or a threaded rod with a load cell. A simple lever mechanism can multiply force without complex hydraulics. Mount the load cell inline and read data with a cheap digital indicator. For cyclic testing, attach a small electric motor with a crank mechanism to create repeated motion.

Secure the prototype using custom 3D-printed or machined brackets that bolt to the extrusion. Use T-nuts and bolts for easy repositioning. If you need precise alignment, drill and pin the brackets after initial setup. Always add safety shields, especially for high-force or cyclic tests.

Calibrate your load cell with known weights before testing. Record data manually or with a simple Arduino setup. This rig will cost under $500 and can be built in a day. It gives you reliable, repeatable data to validate your designs before moving to production.

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