Super Precision Cylindrical Roller Bearings

Super Precision Cylindrical Roller Bearings are high-accuracy rolling bearings engineered for applications demanding exceptional rotational accuracy, rigidity, and speed capability. Featuring cylindrical rollers in line contact with the raceways, these bearings offer high radial load capacity while maintaining the tight tolerances required for precision machine tool spindles and other high-performance rotating equipment.

Unlike standard cylindrical roller bearings, super precision variants are manufactured to ABEC 7 / ABEC 9 (or P4 / P2) tolerance classes, ensuring minimal runout, superior dimensional accuracy, and consistent performance even at high rotational speeds.

Key Characteristics of Super Precision Cylindrical Roller Bearings

• High Radial Load Capacity — Line contact between rollers and raceways provides significantly higher radial load capacity than ball bearings of comparable size.
• High-Speed Capability — Optimized internal geometry and precision-ground components allow for high rotational speeds with minimal heat generation.
• Exceptional Rotational Accuracy — Manufactured to super precision tolerance classes (P4, P2 / ABEC 7, ABEC 9), delivering low radial runout essential for precision applications.
• High Rigidity — Excellent stiffness under load helps maintain positioning accuracy, making them ideal for machining operations requiring tight tolerances.
• Separable Design — Many cylindrical roller bearings feature separable inner/outer rings, simplifying mounting, dismounting, and adjustment of internal clearance.
• Available in Single and Double Row Configurations — Allowing selection based on speed or load priority.

Common Applications

• Super Precision Cylindrical Roller Bearings are widely used in:
• Machine Tool Spindles — milling machines, lathes, grinding machines requiring high accuracy and rigidity
• High-Speed Motorized Spindles
• Precision Gearboxes
• Rolling Mill Equipment
• Robotics & Automation Equipment
• Aerospace & Instrumentation requiring high rotational precision
• Printing Machinery
• Test & Measurement Equipment

Browse by Configuration:

• Single Row Cylindrical Roller Bearings
• Single row bearings are more suitable for higher speed applications, offering lower friction and reduced heat
• generation — ideal for high-speed spindle applications where speed capability is the priority.
• Double Row Cylindrical Roller Bearings
• Double row bearings are more suitable for heavier loads, providing increased radial load capacity and rigidity while maintaining precision — ideal for applications where load-carrying capacity and stiffness are critical.

Why Choose LILY Bearing Super Precision Cylindrical Roller Bearings?

• Interchangeable with SKF part numbers
• Super precision tolerance classes (P4 / P2, ABEC 7 / ABEC 9)
• Single and double row configurations available
• High rigidity and high-speed capability
• Ideal for machine tool spindles and precision rotating equipment