Trank Rollers is a bearing unit composed of machined thick-wall outer ring,needle rollers or cylindrical roller sets,or cage guidance or full complement needle rollerjnner ring or bolt and seal.Featuring multiple compact structure,high rotating accuracy,large varieties, broad adaptability and easy installation.it can bear high radiaJ load and certain shock load and is widely used in machune tool,metallurgical.textile and printing machinery,processing lines and etc.