LME40UUAJ Linear Ball Bushing Works with 40mm Shafts 40x 62x 80 mm LME40UUAJ adjustable Linear Motion Ball Bushing works with 40mm shafts, this is an adjustable sealed linear ball bushing, with the inner diameter of 40mm, outer Diameter of 62mm and a length of 80mm, the LME40UUAJ can be used in many CNC router applications like CNC wood router,plasma and any application that requires smooth linear motion and positioning.