4th Axis

grabcad

This Fusion 360-designed fourth axis was crafted specifically for a Warco WM16B milling machine, similar to PM25V and G0704 models. The concept behind its design allows the work-holding to function as a lathe, accommodating 100mm chucks with a 72mm recess. Featuring a 20mm through hole for bar stock feeding, the base includes a 12mm key for machine table alignment and M10 screw holes that correspond with the table's T-slots. The spindle is constructed from steel tube pressed into a steel disk and driven by a reinforced automotive timing belt without tensioning mechanism. It consists of a 48-tooth aluminum pulley, motor shaft turned from 10 tooth T5 bar stock, LM48548 taper roller bearings for spindle support, and a 0608 bearing at the motor shaft's front end. The main supports are made of 25mm thick aluminum plates, while the base and sides/lid are 16mm and 6mm thick, respectively. The model employs a NEMA 23 3Nm closed loop hybrid stepper/servo motor for each axis, boasting superior torque and holding power. It can even tighten an ER32 collet nut using the fourth axis motion. Plans to design tail stock and trunnion are in progress, with updates forthcoming upon successful completion. Interested builders or those with questions are encouraged to leave comments below.