Such bearing can bear double-direction axial load and has moderately high accuracy and stiffness. ZARN and ZARF models are needle and double-direction thrust roller combination bearings, which can be applied to lead screw support of the digital control machining center, ect. The housing waher of ZARF model is used for flange in stallation and thus can be applied to lead screw support of the digital control machining center, ect. YRT model is a roller and double-direction thrust needle roller combination bearings, which can be used as pivotal bearing for the digital control milling machine.