WOW ball screw support bearing is a combination unit between radial needle rollers and full-component thrust balls, thrust cylindrical rollers or otherwise angular contact balls. It can bear one-way or two-way axial load. combined needle roller bearing is a bearing unit composed of radial needle roller bearing and thrust bearing parts. It features compact structure, small size and high rotating accuracy and bearing certain axial load while holding very high radial load, and multiple structure styles, broad adaptability and easy installation. It is widely used in lathe, metallurgical, textile and printing machinery etc