Other bearings

Frequently asked questions — Other Bearings

• How do you choose between a self-aligning ball bearing and a roller model?

  The self-aligning ball bearing, available in series 1200, 1300, 2200 and 2300, accommodates misalignment of up to ±4°, making it ideal for long shafts or flexible supports. However, its load capacity remains lower than that of spherical roller bearings. For applications requiring high radial capacity combined with self-alignment, CARB toroidal roller bearings provide a specific technical alternative, particularly suited to shafts subject to significant thermal expansion.
• Why use four-point contact bearings in a transmission?

  Four-point contact bearings, belonging to series QJ200 and QJ300, are angular contact variants designed to support axial loads acting in both directions within a single element. This configuration offers a compact solution particularly suited to the space constraints encountered in actuators and gearboxes. They thus help simplify the mechanical arrangement while ensuring effective handling of bidirectional axial forces.
• What are the specific features of bearings for high-speed spindles?

  Precision bearings for spindles, available in series B7000C and 7000ACD, are manufactured to precision classes P4 or P2. These components are intended for machine tools and rotary axes requiring high precision. Their installation allows for adjustable preload and suitable lubrication by grease or oil mist, thereby ensuring stable operation at high rotational speeds.
• In which cases should CARB toroidal roller bearings be preferred?

  CARB toroidal roller bearings are recommended when the application demands both high radial capacity and free axial displacement. This bearing type combines the self-aligning properties of spherical bearings with the advantages of cylindrical rollers. They are favoured in industrial environments where significant thermal expansion of the shaft occurs, such as in paper dryers or fans, in order to absorb these dimensional variations without excessive stress.