Product Overview
This page provides a detailed engineering and procurement reference for the 24040 CA/W33, intended for buyers verifying exact bearing specifications and functional interchangeability before ordering.
As a critical component in the 240 series, the 24040 CA/W33 Spherical Roller Bearing is specifically developed by ZQM Bearings to sustain continuous operation in high-stress environments where extreme load density and reliability are required. Primarily used in primary crushers, vibrating screens, and heavy-duty industrial gearboxes, this model is the engineering choice for procurement professionals seeking a reliable replacement that meets rigorous ISO standards. Its dual-row symmetrical roller design allows for substantial radial capacity while simultaneously managing heavy axial forces in either direction, making it an essential component for critical equipment where downtime is not an option. The 24040 CA/W33 balances high static load resilience (2120 kN) with a specialized 240-series geometry, ensuring operational continuity under the most severe industrial service cycles.
Design & Engineering Advantages
The 24040 CA/W33 is synthesized from premium vacuum-degassed GCr15SiMn bearing steel. This material selection is a calculated engineering decision targeting the mitigation of fatigue spalling by controlling the oxygen content to sub-5 ppm levels, effectively reducing non-metallic inclusions. In high-load industrial bearings, steel purity directly correlates to the fatigue limit, and our controlled manufacturing processes ensure that the 24040 CA/W33 maintains superior Hertzian contact stress distribution across the raceways and rollers.
The internal geometry is optimized with a precision-machined solid brass cage (CA) and symmetrical rollers. This structure provides exceptional shock and vibration stability, as the brass cage offers a lower friction torque and higher thermal stability compared to pressed steel alternatives, preventing cage pocket fracture and premature thermal seizure during continuous, high-impact operation. Furthermore, the W33 feature provides a circumferential lubrication groove and three holes, ensuring relubrication continuity directly to the internal contact zones. The 109 mm width (B) ensures a wide load-carrying footprint, crucial for maintaining boundary lubrication reliability under the dynamic rating of 1140 kN.
Key Features
- Vacuum-degassed GCr15SiMn steel for enhanced raceway fatigue resistance.
- Precision solid brass cage (CA) for extreme vibration and shock load environments.
- Integrated W33 lubrication groove and holes for relubrication continuity.
- Advanced internal geometry to compensate for shaft deflection and misalignment.
- High-load density design for mining and steel production machinery.
Boundary Dimensions
| Designation | 24040 CA/W33 |
| Bore diameter (d) | 200 mm |
| Outside diameter (D) | 310 mm |
| Width (B) | 109 mm |
Procurement Selection
From a TCO (Total Cost of Ownership) perspective, the procurement of the 24040 CA/W33 represents a strategic decision to prioritize uptime in critical industrial systems. Engineering teams should prioritize this brass-cage model over standard steel-cage variants for applications involving intense vibration or sudden impact loads, such as primary crushing stages. The functional interchangeability of the 24040 CA/W33 with brands like SKF and FAG ensures that procurement verification is straightforward, matching the Cr=1140 kN dynamic rating required for heavy-duty replacements. ZQM Bearings conducts batch-to-batch dimensional audits to ensure every 24040 CA/W33 meets the static load rating of 2120 kN, fulfilling the requirements for high-performance industrial procurement verification.
Cross-reference & Replacement
| ZQM Model | Reference Brand | Reference Model | Equivalence Basis |
|---|---|---|---|
| 24040 CA/W33 | SKF | 24040 CC/W33 | Dimensional conformity |
| 24040 CA/W33 | FAG | 24040-E1-XL-M | Installation interchangeability |
| 24040 CA/W33 | NSK | 24040CAMKE4 | Internal geometry compatibility |
ZQM Bearings ensures that our 24040 CA/W33 is fully interchangeable with global ISO standards for replacement evaluation. Always verify the shaft abutment (da min=212 mm) and housing abutment (Da max=298 mm) dimensions during engineering選型 to ensure structural integrity and load path continuity.
Typical Industrial Applications
- Primary Jaw and Cone Crushers
- Heavy-duty Mining Vibrating Screens
- Steel Rolling Mill Drives and Stand Supports
- Large Conveyor Head and Tail Pulleys
- Vertical Raw Mills in Cement Production
Service Life & Reliability
The reliability of the 24040 CA/W33 is grounded in advanced L10 life calculation logic, where the relationship between material purity and dynamic load distribution is maximized. By reducing friction torque through optimized roller-to-raceway contact, the bearing maintains its heat treatment stability, preventing dimensional drift that could lead to early clearance loss. High-load industrial environments demand that the bearing resists subsurface-initiated fatigue; ZQM achieves this by controlling the ppm level of inclusions, ensuring that the 24040 CA/W33 achieves its full theoretical fatigue life. The robust 2120 kN static load rating (C0) provides a significant safety factor against permanent deformation during stationary impact loads.
Installation & Lubrication Notes
Success in heavy-duty applications depends heavily on precise misalignment compensation. The 24040 CA/W33 can typically accommodate up to 2 degrees of misalignment; however, exceeding this limit results in edge loading and localized stress peaks. Relubrication via the W33 feature is essential for relubrication continuity, following the speed ratings of Grease at 850 r/min or Oil at 1100 r/min to avoid boundary lubrication failure. Incorrect installation, such as excessive heating or improper shaft fit, can lead to thermal seizure or ring fracture, particularly in high-vibration mining environments.
Frequently Asked Questions
How does material purity influence the fatigue resistance of 24040 CA/W33?
Material purity is the primary determinant of the L10 fatigue life in the 24040 CA/W33. By using vacuum-degassed steel, ZQM reduces non-metallic inclusions that otherwise act as stress concentration points under the contact raceway surface. If inclusions are present, the constant Hertzian contact stress triggers subsurface cracks, leading to premature fatigue spalling. High purity ensures that the 24040 CA/W33 maintains its dimensional stability and load-carrying capacity over millions of stress cycles in harsh environments.
Why choose a solid brass cage (CA) for the 24040 model in mining?
In mining environments involving heavy vibration and shock loads, a solid brass cage provides superior structural rigidity and heat dissipation compared to pressed steel cages. The CA design in the 24040 CA/W33 reduces friction torque and prevents cage pocket fracture under extreme impact. This ensures that the internal clearance optimization remains stable even when the equipment is subjected to continuous vibration stress, making it the preferred choice for primary crushers and vibrating screens.
What is the importance of the W33 relubrication feature in the 24040 CA/W33?
The W33 feature, consisting of a central lubrication groove and three holes, is vital for relubrication continuity in large bearings. It allows fresh lubricant to be introduced directly into the center of the 24040 CA/W33, ensuring the rollers are always protected by a boundary lubrication layer. This is especially critical in gearboxes and rolling mills where the bearing operates near its 1100 r/min oil speed limit or in high-contamination industrial zones.
How does the 24040 CA/W33 manage heavy axial loads in a vibrating screen?
The 24040 CA/W33 uses two rows of symmetrical rollers and a spherical outer raceway, allowing the load path to be distributed across a wider contact area. Even when the vibrating screen causes significant shaft deflection, the self-aligning design ensures that the load remains centered. The specific calculation factors (Y1=2.1, Y2=3.1) reflect how effectively the bearing converts axial force into radial load distribution, preventing internal stress peaks that cause early failure.
What are the critical installation abutment dimensions for the 24040 CA/W33?
For a 24040 CA/W33 installation, the shaft abutment (da min) should be 212 mm, and the housing abutment (Da max) should not exceed 298 mm. If these dimensions are not respected, the bearing’s load path will be compromised, leading to vibration stress or axial drift. The fillet radius (ra max=2 mm) must be strictly controlled to ensure the bearing sits flush against the shoulder, maintaining its precise axial positioning for long-term service life.
Related Bearing Models
- 24036 CA/W33
- 24044 CA/W33
- 23040 CA/W33
- 24140 CA/W33
- 23140 CA/W33
Technical Support & Global Inquiry
ZQM Bearings supports long-term supply programs for international OEMs and distributors, emphasizing batch-to-batch dimensional consistency and controlled manufacturing processes. Our engineering team focuses on standardized quality control across repeated production batches to ensure consistent fit and performance for overseas shipments. Standardized export packaging and anti-rust surface treatment are provided for all overseas shipments to maintain the dimensional integrity of your order. ZQM engineers provide 24/7 technical selection support to ensure the selected bearing solution matches your specific industrial application needs. Request a customized quote for bulk orders or OEM-specific bearing requirements to support your high-performance projects.
