23980 CA.K.C3.W33 STC spherical roller bearing

STC 23980 CA.K.C3.W33 Spherical Roller Bearing – Macro-Scale Precision

The STC 23980 CA.K.C3.W33 is a double-row, self-aligning rolling unit designed for the most demanding bearing arrangements. This model combines the space-saving geometry of the 239 series with a tapered bore (K) with a 1:12 taper, enabling precise mounting via an adapter sleeve or a tapered journal. Equipped with an enlarged C3 internal clearance, the bearing excels in managing shaft thermal expansion, preventing seizure during intensive operation. The solid brass cage (CA) ensures uncompromising roller guidance even under severe vibrations.

Application

• Mining Industry: Main bearings for drive drums in massive conveyor systems with a 400 mm shaft diameter.
• Energy Sector: Low-speed hydro-turbine shafts and main gearboxes in offshore wind turbines.
• Steel Mills: Rolling mill stands and heavy transport mechanisms subjected to high operating temperatures.
• Paper Industry: Large-scale pressing and drying cylinders requiring shaft deflection compensation.
• Shipbuilding: Propeller shaft line bearings for large vessels.

Technical Specification

• Manufacturer: STC (Specialized Technical Components).
• Designation: 23980 CA.K.C3.W33.
• Dimensions: 400 mm (ID) x 540 mm (OD) x 106 mm (Width).
• Bore: Tapered (K) – 1:12 taper ratio (requires adapter sleeve or tapered shaft).
• Internal Clearance: C3 (Greater than normal) – ideal for high temperature differentials.
• Lubrication (W33): Circumferential groove and lubrication holes in the outer ring for easy maintenance.

Features and Benefits

• Compact 239 Series: Allows for a stiffer, larger-diameter shaft without the need for an oversized housing.
• Solid Brass Cage (CA): Guarantees the highest mechanical and chemical resistance, crucial in boundary lubrication conditions.
• Self-Alignment: Operates failure-free under misalignment and shaft deflection, protecting the machine structure.
• C3 Clearance: A safety margin preventing bearing lock-up during sudden shaft temperature spikes.
• W33 System: Facilitates fresh lubricant delivery directly to the rolling zone, minimizing friction and wear.

Why Choose This Product

By choosing the STC 23980 CA.K.C3.W33, you are investing in the safety of critical processes. With a 400 mm shaft diameter, any unplanned bearing replacement generates massive downtime costs. The use of a brass cage and C3 clearance in this model serves as an insurance policy for your machinery, ensuring stable performance where standard solutions fail due to heat and pressure.