Quality Bearings & Components (QBC) offers a FREE 306-page "CATALOG B620," which includes a comprehensive 48-page design section and features 
over 12,580 off-the-shelf bearings of all types. 

Major product groups include: ball bearings, thrust bearings, sleeve bearings, needle bearings, roller clutches, guide wheels & rail systems, linear ball bearings, lined aluminum linear bearings, and inner and outer ring spacers. Product quality is ensured through statistical process control, ensuring the highest quality products at the lowest possible cost. 

Individual Sections of the Catalog can be downloaded by clicking on the Download link against each section.