23984 CA.K.C3.W33 STC spherical roller bearing

STC 23984 CA.K.C3.W33 Spherical Roller Bearing – Compact Heavy-Duty Power

The STC 23984 CA.K.C3.W33 is a double-row, self-aligning rolling unit engineered for extreme radial loads in applications with limited installation space. Thanks to its barrel-shaped rollers, this model automatically compensates for shaft-to-housing misalignment, preventing harmful edge stresses. The CA design features a solid two-piece brass cage, ensuring superior roller guidance, high thermal stability, and vibration resistance.

Application

• Mining Industry: Radial support for conveyor drums and large-diameter vibrating screens.
• Metallurgy: Steel and non-ferrous rolling mills requiring high capacity within a slim housing.
• Paper Industry: Large-scale drying and pressing rolls operating at high temperatures.
• Energy Sector: Main shafts for hydroelectric turbines and massive planetary gearboxes.
• Heavy Construction: Slewing mechanisms for port cranes and Tunnel Boring Machines (TBM).

Technical Specification

• Manufacturer: STC (Specialized Technical Components).
• Designation: 23984 CA.K.C3.W33.
• Dimensions: 420 mm (ID) x 560 mm (OD) x 106 mm (Width).
• Tapered Bore (K): 1:12 taper – ideal for precise mounting using an adapter sleeve.
• Internal Clearance: C3 – increased radial clearance to prevent seizure during thermal expansion.
• Lubrication (W33): Circumferential groove and three lubrication holes in the outer ring for efficient 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 a safety margin under boundary lubrication and resists high operating temperatures.
• Self-Aligning Capability: Eliminates the need for perfect housing alignment, reducing installation time and extending service life.
• C3 Clearance Advantage: Ensures stable machine operation even under significant thermal expansion of the shaft.
• W33 System: Facilitates fresh lubricant delivery directly to the rolling zone, drastically reducing friction.

Why Choose This Product

Investing in the STC 23984 CA.K.C3.W33 means choosing a component with optimized geometry that combines massive load capacity with space savings. For a 420 mm shaft, manufacturing precision and heat resistance (C3 clearance) are critical to avoiding failure. This bearing is the foundation for the reliable operation of your heaviest industrial installations, ensuring the lowest Total Cost of Ownership (TCO).