Frequently Asked Questions

Products (12)

Answer: 

Pot Bearings are multi-rotational bearings that permit rotation by the use of a confined elastomer – confined within a “pot”. Please see our Products page for “Pot Bearings”.

Answer: 

Disc Bearings are multi-rotational bearings that permit rotation by the compression of a urethane disc. Please see our Products page for “Disc Bearings”.

Answer: 

Laminated Elastomeric Bearings are bearings that permit rotation and translation though the compression and shear of elastomeric layers “sandwiched” between layers of thin steel plates. Please see our Products page for “Elastomeric Bearings”.

Answer: 

Spherical Bearings are multi-rotational bearings that permit rotation by the movement of concave stainless steel surface over a matching convex surface that is covered with woven PTFE fabric. Please see our Products page for “TeXLon Spherical Bearings”.

Answer: 

Self-Lubricating Bronze Bearings are bearings that allow rotation and translation by the movement of self-lubricated bronze elements over steel sliding surfaces – both flat and radial. Please see our Products page for “Cosmec XL Self-Lubricating Bronze Bearings”

Answer: 

The Laminated Elastomeric Bearing is the most economical to purchase, but is not well suited for all applications. Please see our Products page for “Elastomeric Bearings”.

Answer: 

No. All bearing types produced by Cosmec can be (and have been) used in many other varied applications, such as Hydro-Electric, Buildings, Piping, Vessels, and many others. Please call or email Cosmec’s Engineering Staff with your application.

Answer: 

Pot Bearing Advantages:

  • Pot Bearings are multi-rotational
  • Pot Bearings have negligible vertical deflection under load.
  • Pot Bearings have uniform vertical deflection under load.
  • Pot Bearings have high vertical and horizontal load capacity.
  • Pot Bearings cause relatively low stress on the bearing seats.

 
Pot Bearing Disadvantages:

  • Pot Bearings require periodic maintenance.
  • While pot bearings are relatively low in height, other bearing types – such as Disc Bearings – are usually lower in overall height.
Answer: 

Disc Bearing Advantages:

  • Disc Bearings are multi-rotational.
  • Disc Bearings have relatively high vertical load capacity and medium-high to medium horizontal load capacity.
  • Disc Bearings require less maintenance than Pot Bearings.
  • Disc Bearings are usually low in overall height.

 
Disc Bearing Disadvantages:

  • Disc Bearings still require some periodic maintenance.
  • Disc Bearings exhibit more vertical deflection than Pot Bearings.
  • Disc Bearings exhibit varying degrees of vertical deflection from bearing to bearing.

 

Answer: 

Laminated Elastomeric Bearing Advantages:

  • Laminated Elastomeric Bearings are the lowest initial cost bearing type.
  • Laminated Elastomeric Bearings are very low maintenance if installed properly.
  • Laminated Elastomeric Bearings may be combined with PTFE/Stainless Steel sliding surface components to accommodate larger movements.
  • Many different configurations of laminated Elastomeric Bearings are possible.

 
Laminated Elastomeric Bearing Disadvantages:

  • Laminated Elastomeric Bearings are not well suited for multi-rotation.
  • Laminated Elastomeric Bearings can “walk” out of place with time if not positively held in place.
  • Laminated Elastomeric Bearings exhibit more vertical deflection than Pot Bearings.
  • Laminated Elastomeric Bearings exhibit varying degrees of vertical deflection from bearing to bearing.
Answer: 

Spherical Bearing Advantages:

  • Spherical Bearings are multi-rotational.
  • Spherical Bearings can accommodate higher rotations then most other multi-rotational bearings.
  • Spherical Bearings have relatively high vertical load capacity and medium-high to medium horizontal load capacity.
  • Spherical Bearings are usually low in overall height.
  • Spherical Bearings have negligible vertical deflection under load.
  • Spherical Bearings have uniform vertical deflection under load.

 
Spherical Bearing Disadvantages:

  • Spherical Bearings require careful attention when installing – especially to insure no disassembly.
  • Spherical Bearings require periodic maintenance.
Answer: 

Self-Lubricating Bronze Bearing Advantages:

  • Self-Lubricating Bronze Bearings can be made multi-rotational.
  • Self-Lubricating Bronze Bearings have negligible vertical deflection under load.
  • Self-Lubricating Bronze Bearings have uniform vertical deflection under load.

 
Self-Lubricating Bronze Bearing Disadvantages:

  • Self-Lubricating Bronze Bearings require periodic maintenance.
  • All Sliding surfaces must be kept free of debris.
Answer: 

The following are examples of the Specifications Cosmec uses in the design and fabrication of bearings:

  • AASHTO LRFD Bridge Design Specifications– Section 14, “Joints and Bearings”.
  • AASHTO LRFD Bridge Construction Specifications – Section 18, “Bearing Devices”.
  • AASHTO Standard Specifications for Highway Bridges – Division I – Section 14, “Bearings”.
  • AASHTO Standard Specifications for Highway Bridges – Division II – Section 18, “Bearings”.
  • AASHTO Standard Specifications for Transportation Materials and Methods of Sampling and Testing – Specification M 251, “Plain and Laminated Elastomeric Bridge Bearings”.
  • All State Departments of Transportation Applicable Standard Specifications.
  • All Job-Specific Special Provisions or Supplemental Specifications.
  • AWS D1.1 & D1.5 Structural Welding Codes.
  • ASTM D5977, “Standard Specification for High Load Rotational Spherical Bearings for Bridges and Structures”.
  • Other Specifications as Required.

Materials (1)

Answer: 

The following are the Specifications for typical materials used in the fabrication of Cosmec Bearings:

  • Steel: ASTM A709 Grade 36, Grade 50 & Grade 50W.
  • Stainless Steel: ASTM A240 Type 304 & Type 316.
  • PTFE: ASTM D4894.
  • Brass Sealing Rings: ASTM B36, Half-Hard Temper.
  • Rubber: Neoprene – 50, 60 & 70 Durometer

                   Natural Rubber: 50, 55 & 60 Durometer
                   All per AASHTO M 251 Specifications.

  • Bronze: MANY - See Cosmec XL™ Self-Lubricating Bearings in Products Section of website.
  • Polyether Urethane Discs: Per AASHTO Specifications or State DOT mandated Specifications.

 

Testing (1)

Answer: 

Cosmec has extensive testing equipment and test presses available in-house – all are dedicated to the testing of full size bearings and for testing bearing materials. In the case of load testing bearings, Cosmec can test in excess of 2,700,000 lbf. of vertical load. All testing can be witnessed by the Owner’s specified Representatives.

Services (3)

Design (1)

Answer: 

Cosmec Engineering Staff can design Pot Bearings, Disc Bearings, Spherical Bearings, Self-Lubrication Bronze Bearings and some other types of bearings. In addition, the staff can design some special purpose devices as required. Please contact our Engineering Staff with your Design requirements.

Answer: 

Please contact your Salesperson for the status of your order. If you are unsure of who your Salesperson is or how to contact him/her, please see “Sales by State” under the Contacts section of our website.

Answer: 

The lead-time varies depending on the type and quantity of bearings required. Bearings requiring designing as well as the production of shop drawings typically require between 6 and 10 weeks for design and drafting. Production and delivery of these bearings is typically 12 to 14 weeks after the receipt of approved design calculations and approved shop drawings. Bearings that do not require designing can typically take much less time in both producing shop drawings and in production. Job-specific lead-times, however, can be accommodated. Please contact your Salesperson to discuss your specific lead-time requirements.

Answer: 

Cosmec is a Material Supplier, not a Subcontractor, therefore a traditional Purchase Order will suffice. Please contact your Salesperson to discuss your specific purchase order requirements.

Answer: 

Cosmec’s credit terms are net 30 days. Customers are required to complete a Credit Application prior to the granting of credit terms. Please contact your Salesperson to discuss your specific credit requirements.

Answer: 

All Cosmec quotations are subject to our Standard Terms and Conditions. All quotations are accompanied by a set of these terms and conditions. Please contact your Salesperson to discuss requirements that may differ from our Standard Terms and Conditions.

Answer: 

Contact your Salesperson immediately to discuss your new delivery requirements. The new requirements will be reviewed and you will be informed of new, possible delivery dates.

Answer: 

Contact your Salesperson immediately and let him/her know what part or parts need replacement. You will be given a new quotation with delivery dates as soon as possible.

Answer: 

Contact your Salesperson immediately with the problem. If possible, please include any sketches or pictures of the condition. The Salesperson will review the problem with Cosmec Engineering Staff and they will suggest possible solutions.

Answer: 

You can contact your Salesperson (see the Contact section of our website) or you can contact our Engineering Staff directly at engineering@cosmecinc.com. Please include any sketches, design plans and design requirements needed for the project.

Answer: 

Contact your Salesperson immediately with the problem. If possible, please include any sketches or pictures of the condition. The Salesperson will review the problem with Cosmec’s Engineering Staff.

Answer: 

Please see “Sales by State” under the Contacts section of our website for our Salespeople. -  or email Sales at sales@cosmecinc.com.