Vex high strength shafts vex 276 3523 larger 635mm frac14in shafts are tougher stronger and ready for even the most stressful robotic applications these thicker shafts are more resistant to both twisting and bending fatigue meaning that you should have no fear of designing high torque gearboxes or high impact drivetrainsthe shaft is actually designed about 1mm shorter than its respective 8 32 standoff this means that if you use standoffs to hold together two pieces of metal the