23976 CA.W33 STC spherical roller bearing

STC 23976 CA.W33 Spherical Roller Bearing – Compact Heavy-Duty Power

The STC 23976 CA.W33 is a double-row, self-aligning rolling unit engineered for extreme radial loads in applications where installation space is at a premium. Thanks to its barrel-shaped rollers, this model automatically compensates for shaft-to-housing misalignment, preventing harmful edge stresses. The CA execution features a solid two-piece brass cage, ensuring superior roller guidance, high thermal stability, and exceptional resistance to heavy vibrations.

Application

• Mining & Quarrying: Main bearings for conveyor belt drums and large-diameter vibrating screens.
• Metallurgy: Steel and non-ferrous rolling mills requiring high capacity within a slim housing.
• Paper Industry: Large-scale pressing and drying cylinders subjected to constant pressure.
• Energy Sector: Low-speed shafts for hydroelectric turbines and main gearboxes in wind power plants.
• Heavy Construction: Slewing mechanisms in port cranes and TBMs (Tunnel Boring Machines).

Technical Specification

• Manufacturer: STC (Specialized Technical Components).
• Designation: 23976 CA.W33.
• Dimensions: 380 mm (ID) x 520 mm (OD) x 106 mm (Width).
• Bore: Cylindrical – standard mounting directly on the shaft.
• Internal Clearance: CN (Normal) – optimal for standard fitting and operating temperatures.
• Lubrication (W33): Circumferential groove and three lubrication holes in the outer ring for easy maintenance.

Features and Benefits

• 239 Series (Slim Design): Offers the lowest cross-section among spherical bearings, allowing large shafts in smaller housings.
• Solid Brass Cage (CA): Provides higher mechanical rigidity and longer service life than steel cages, especially under boundary lubrication.
• Self-Alignment: Accommodates shaft deflections, drastically reducing the risk of premature failure and costly downtime.
• W33 System: Facilitates fresh lubricant delivery directly to the rolling zone, minimizing friction and heat generation.
• Open Design: Simplifies technical inspections and allows for free lubricant exchange in circulation systems.

Why Choose This Product

By investing in the STC 23976 CA.W33 bearing, you ensure the operational uptime of your heaviest machinery. With a 380 mm bore, bearing replacement is a major logistical task – choosing a proven design with a brass cage ensures years of maintenance-free service in the harshest industrial environments, combining massive load capacity with space efficiency.