Considerations When Purchasing Rexnord Filament Bearings



Our partners at Rexnord Corporation address common questions our customers have when purchasing bearings, such as Rexnord’s filament bearings. What is a filament bearing? When would you use one? OTP Industrial Solutions and Rexnord team up to help our customers make an informed purchase decision.


What is a filament bearing? 

“Filament” is a general term to designate filament wound, non-metallic composite bearings. The structure of the filament bearing should be reinforced with continuous filaments of fiberglass or another material helically wound around a mandrel.


When should you use a filament bearing?

Among the most common filament bearing applications are agricultural machinery, construction equipment, energy processing equipment, food and beverage processing equipment, forest product processing equipment, hydraulic and pneumatic cylinders, lift systems, material handling machinery, mining equipment, recreational vehicle clutches, sailboats, stern drives, and water management valves and actuators.

When considering filament bearings, keep in mind that straight sleeve configurations work well in oscillatory (pivoting), linear sliding and slow-speed full rotation applications like those found in recreational vehicle clutches, construction equipment and water management butterfly valves. Hex and square bore configurations are used in applications such as agriculture and wood processing equipment. These configurations provide torque transmission or prevent shaft rotation, while allowing linear motion. Linear configurations work well in harsh applications like contaminated or wash-down environments, as well as food packaging machinery and factory automated production lines.


When considering your filament bearings, keep in mind the importance of:

  • Self-lubricating features that reduce maintenance time
  • Corrosion and moisture resistance, meaning they can perform when submerged in fresh or salt water
  • Non-metallic composite material that will not seize to a shaft
  • Non-metallic options that could be up to 77 percent lighter in weight than steel bearings and 30 percent lighter than aluminum bearings
  • Electrical insulation


Contact us today to learn more about Rexnord filament bearings and get the answers to all of your bearings questions.



By Woody Schmetzer

When choosing the right bearing, cheaper is not always better—or even cost effective. A less expensive bearing typically means lower quality, additional bearing change outs and more bearing purchases. Even though the bearing is less expensive on paper, over time the costs can add up.

For example, OTP recently helped a customer with two bottling facilities lower its maintenance costs and improve its operations by choosing a product line that stood above the competition and was a great fit for our customer’s needs. Each of the customer’s plants experienced premature bearing failures and went through many pillow and flange block bearings, which we supplied to them for years. It reached a point where we needed to do something different to improve the bearings’ performance.

After analyzing our customer’s operations and unique needs, OTP technicians selected Sealmaster bearings. The Sealmaster bearing chosen for our customer handles loads better and provides enhanced lubrication, which results in longer bearing life. The Sealmaster bearing provides superior features:

  • Wider inner and outer races
  • Felt seal instead of rubber lip
  • Land riding metal ball retainer
  • Zone hardened inner race
  • Locking pin that allows grease to go directly into the insert bearing

Overall, switching our customer to Sealmaster bearings meant less maintenance and downtime from changing out worn bearings. Three years later, the Sealmaster bearings are still running strong inside our customer’s facilities.

Need an expert solution for your bearings? OTP Industrial Solutions is happy to answer your questions and ready to provide assistance for your industrial product needs. Contact an OTP Sales Engineer for more information.