One of the most frequently misunderstood principles regarding the use of plain bearings is something known simply as the 2:1 Ratio. This paper will explore the history behind the 2:1Ratio, the mathematical theory supporting the rule, practical limitations of implementing the 2:1 Ratio and finally some simple troubleshooting steps which can be taken to overcome any problems.

In this white paper, two round shaft plain bearing technologies are explored from a tribological and application standpoint. The first technology is exemplified in the PBC Linear Simplicity bearing, which consists of a self-lubricating liner bonded to the inside of an essentially cylindrical shell. The second technology is found in the IGUS DryLin bearing based on a self-lubricating injection molded liner affixed to the inside of a similar shell.

Every linear bearing application requires a linear shaft as the inner raceway. However, many times that inner race is overlooked in the design process because it is presumed to be part of the bearing solution. The truth is that the shafting utilized in a linear application is just as critical as the bearing chosen. 

To truly be self-lubricating, a bearing system must do exactly what the name implies. It must provide its own lubrication throughout the entire life of the system without the aid of some external source providing any type of lubrication for any period of time. It must be designed and manufactured into the bearing material from the beginning. In this white paper we will be debunking the myths of “Lubed for Life”.

Every linear bearing application requires a linear shaft as the inner raceway. However, many times that inner race is overlooked in the design process because it is presumed to be part of the bearing solution. Other times it is merely considered insignificant. It is also the case that in the procurement stages, linear shafting is quite often thought to be a commodity; in other words, it’s all the same.

PBC Linear, a Pacific Bearing Company and a global leader in linear motion solutions, continues to strengthen their Applied Cobotics brand with the latest product offering, the Automated Storage and Retrieval System (ASRS). This essential automation tool will help small- to medium-sized companies boost their robot production without significant increases in labor, and ultimately see a higher return on their investments.