Pocket NC 5 Axis Desktop CNC Mill V2-50 can cut materials up to a hardness of G5 titanium although optimally cuts delrin, aluminum or softer steels. The V2-50 has a 50,000 RPM spindle which requires an air supply.* Travel is 5.0 inches/128.3 mm (Y), 4.55 inches/115.5mm (X) and 3.55 inches/90.1mm (Z). The machine accepts standard G code. The V2-50CHK has an NR-2551 NSK Spindle.