Bearings
Thomson - Wide Range of beaings and motion Systems
Slocum's Bearing Presentation - Overview of all types of bearings based on text Precision Machine Design by Alex Slocum.
SKF Bearing Guide - Self study guide that describes pros and cons of various rolling element bearings.
Shigley's Standard Handbook of Machine Design Part 5 - Review of journal bearings, rolling contact bearings, and lubrication. Must be on UCSD campus or use VPN to access.
Roller and Ball Bearings Design Guide by NHBB - Roller and Ball Bearings Design Guide by NHBB
NSK - Large bearing company
Kaman Industrial Technologies - Bearing Manufacturer
Jewel Bearings - Jewel bearings have very low radius resulting in low friction and can work well with light loads.
Flexure Joints - Flexures - Lecture Summary from the The University of Michigan by Brian Trease