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Understanding Linear Bearings: An Overview of Types and Options

Understanding Linear Bearings: An Overview of Types and Options

Posted by Sam K. on 30th Mar 2023

If you're involved in any sort of mechanical or engineering work, chances are you've come across the term "linear bearings" at some point. But what exactly are they, and why are they important? In this post, we'll take a closer look at linear bearings, explore the different types and options available, and highlight the benefits of using PTFE lined plain linear bearings from Bearings Direct.

What are Linear Bearings?

In simple terms, linear bearings are mechanical devices that allow linear or straight-line motion between two parts. They work by reducing friction and wear between moving parts, enabling smooth and efficient movement. Linear bearings are used in a wide range of applications, from industrial machinery and automation systems to medical equipment and consumer products.

Types of Linear Bearings

There are several different types of linear bearings, each with its own unique features and benefits. Some of the most common types include:

  1. Ball Bearings: These are the most common type of linear bearing, consisting of a cage filled with ball bearings that move along a track. Ball bearings are relatively inexpensive, easy to install, and can handle heavy loads.
  2. Roller Bearings: These bearings use cylindrical rollers instead of balls to reduce friction and allow for smoother motion. Roller bearings are ideal for high-speed applications and can handle both radial and axial loads.
  3. Plain Bearings: Also known as sleeve bearings, these bearings consist of a cylindrical shaft or bushing that slides inside a larger cylindrical housing. Plain bearings are simple, low-cost, and require minimal maintenance.
  4. PTFE Lined Plain Bearings: These are a special type of plain bearing that feature a PTFE (Polytetrafluoroethylene) lining, which provides exceptional resistance to friction, wear, and corrosion. PTFE lined plain bearings are ideal for applications that require high levels of precision and durability, such as in medical equipment and food processing machinery.

Why Choose Bearings Direct?

At Bearings Direct, we offer a wide range of linear bearings to meet your needs, including ball bearings, roller bearings, and PTFE lined plain bearings. Our bearings are made from high-quality materials, such as chrome steel and stainless steel, and are designed to provide long-lasting performance in even the most demanding environments. Plus, with our extensive inventory and fast shipping times, you can be sure that you'll receive your bearings when you need them.


Linear bearings are a crucial component in many mechanical and engineering applications, enabling smooth and efficient motion between two parts. With so many types and options available, it's important to choose the right bearing for your specific needs. At Bearings Direct, we offer a variety of linear bearings, including PTFE lined plain bearings, that can help you achieve the precision and durability you require. Contact us today to learn more about our products and how we can help you with your linear bearing needs.