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“Industry Ready” Direct Fit Bearings

Bolt-in Solutions to Extend Time Between Replacements.


Take Advantage of Our Experience With Proven Designs

We’ve figured out the details, so you just need to bolt in a superior bearing solution and extend your operating time.

Hanger Bearings

These proven Thordon screw conveyor hanger bearings are available in a variety of material grades, styles, and sizes depending on the application. The most common applications are in materials handling, mining, sewage/wastewater treatment, and other industrial process equipment.

Self-Aligning / Spherical Bearings

Bearing Material Information

All of our “Industry Ready” bearing solutions use proprietary self-lubricating materials manufactured by Thordon Bearings.  Material grade options and properties are summarized here.

Thordon XL

Thordon SXL







Temperature Limit 60°C (140°F) 60°C (140°F) 80°C (175°F) 80°C (175°F)
OK for Dry Start Up?
Resistance to Abrasives? Moderate Good Good Good
Drinking Water Certified? NO NO NO YES
General Remarks Good balance between abrasion resistance & low friction. Lowest friction, suitable for limited dry-start. Preferred choice for higher loading, or higher operating temperatures. Best material for food-grade applications requiring NSF/ANSI 51 certification.

General Design Guidelines

Bearing Pressure
Bearing pressure is calculated by considering the bearing load over the contact area, and each material grade will have a maximum design limit to ensure long and reliable bearing wear life.
Sliding Speed
Sliding speeds create friction heat in the bearing, but in the low speed oscillating or rotating applications pictured here it is rarely the limiting factor in design. Provide an estimated bearing load and sliding speed, and the Millstream team can easily check this for you.
Wall Thickness
Minimum wall thickness is determined by the interference fit required to secure it within the housing, but should not be less than the minimum recommended amount for any given size. The wall thickness of the bearing also influences bearing clearance, since thermal expansion and water absorption allowances are proportional to the wall thickness. A thicker bearing wall will expand and contract more with water absorption or thermal expansion effects, so when possible, it is recommended to minimize the wall thickness to achieve a tighter clearance.
Mating Surface
The mating surface should be made of a corrosion resistant metallic material, with a hardness in the range of 20 Rockwell C when possible. The surface finish of the mating surface should be reasonably smooth according to good machining practice; for optimum performance with Thordon materials, a surface finish of 0.8 micro-meters (32 micro-inches) is recommended.
Fitting Methods
Polymer bearings are usually fitted with an interference fit or bonded using an epoxy adhesive. If interference fitting is used, it is easiest to freeze fit the bearings. In cases where freeze fitting is not possible, bearings can also be press-fitted.
Machining Tolerances
Polymer bearings do not necessarily need to be machined to the same tight tolerances as metal bearings to achieve optimum performance. Consult Millstream for correct bearing sizing and machining tolerances for your application.

Customized Solutions

If you don’t see what you need here, or want to modify an existing solution – let us know!  We can offer competitive customized solutions for most of the products shown.