Before planning/designing any CNC machines using 80/20 extruded aluminum, one should look at the specification. Recently, I have purchased 80/20 2020 aluminum to build my CNC machine and found that pieces I've received are not perfectly straight. Pieces are bowed and my CNC table is off. According to 80/20 team, they are within provided tolerance of straightness. T-profile specification for straightness / flatness and beam deflection are two different things. When you order 80/20, your pieces are not guaranteed to be straight, but it will be within tolerance, which is 0.0125 inches/foot. Don't waste your time if you are looking for accuracy. I do not recommend any mass production using 80/20 Inc. Extruded Aluminum.

See Table Below...