Product Specifications
| Parameter |
Details |
| Model NO. |
HK4520 |
| Load Direction |
Radial Bearing |
| Style |
Without Outer Ring, Without Inner Ring |
| Material |
Bearing Steel |
| Type |
Closed |
| Product Name |
Needle Roller Bearing |
| Lubrication |
Grease or Oil |
| Precision Rating |
P0 P6 P5 P4 P2 |
| Clearance |
C0 C3 C4 |
| Specification |
45*52*20 mm |
| HS Code |
8482102000 |
Application Industries
| Industry |
Typical Equipment |
| Industrial Machinery |
Machine Tools, Printing Equipment, Reducers |
| Automotive |
Transmission Systems, Gearboxes |
| Agricultural Machinery |
Harvesters, Tractors |
| Construction |
Excavators, Heavy Load Machinery |
| New Energy |
Wind Turbines, Solar Equipment |
Reduce Downtime with HK4520 Needle Roller Bearings for Industrial Machinery
Industrial machinery operators know the cost of unexpected downtime—hours of halted production, missed deadlines, and expensive repairs. When bearings fail prematurely due to poor precision or material quality, the ripple effects disrupt entire operations. Sourcing reliable, high-precision bearings that meet exact specifications often means navigating long lead times or minimum order quantities that don’t align with urgent maintenance needs.
HK4520 Needle Roller Bearings: Engineered for Reliable Performance
The HK4520 Needle Roller Bearing, with dimensions 45x52x20mm and precision ratings from P0 to P4, is designed to address these challenges. As an integrated manufacturer with full R&D and QC capabilities, we ensure each bearing meets strict quality standards, reducing the risk of early failure. Whether for machine tool spindles,印刷设备齿轮箱, or reducer assemblies, this radial bearing without outer ring delivers consistent performance even in high-load industrial environments.
Optimal Performance in Critical Industrial Applications
This Needle Roller Bearing excels in applications requiring high radial load capacity within limited space. Its compact design (45mm bore, 52mm outer diameter, 20mm width) makes it ideal for machinery where installation space is constrained, such as gearboxes and transmission systems. The closed type construction provides effective protection against contaminants, ensuring reliability in dusty or lubricant-rich industrial settings. When operating under heavy loads or continuous rotation, the bearing’s bearing steel material maintains structural integrity, supporting extended service life.
Technical Precision That Drives Machinery Efficiency
The HK4520’s performance is defined by key technical features that directly impact industrial machinery efficiency. Its precision ratings (P0-P4) ensure tight dimensional tolerances, reducing vibration and noise in high-speed applications like CNC machine spindles. Clearance options (C0, C3, C4) allow customization for thermal expansion needs—critical in equipment operating at variable temperatures. The bearing’s radial load design optimizes force distribution, minimizing wear on adjacent components. When paired with proper lubrication (grease or oil), these features work together to extend maintenance intervals and reduce overall operational costs.
Why Authentic Bearings Matter for Long-Term Cost Control
Choosing genuine HK4520 Needle Roller Bearings over counterfeit alternatives avoids hidden costs that erode profitability. Fake bearings often use substandard materials, leading to premature wear, shaft damage, or catastrophic failure. The resulting downtime can cost thousands in lost production, while repairs may require replacing damaged machinery components beyond the bearing itself. Our bearings, backed by ISO9001 and ISO14001 certifications, undergo rigorous testing to ensure material quality and performance consistency—delivering a lower total cost of ownership through reliable service life and reduced maintenance needs.
Your Trusted Partner for Bearing Solutions
With over 18 years of experience serving global buyers, Jinan Saifan Bearing combines manufacturing expertise with customer-focused service. Our full OEM/ODM capabilities allow customization to meet unique industrial requirements, while flexible order options (1pc MOQ for standard items) support both emergency repairs and bulk production needs. We stand behind our products with a 12-month global warranty, free technical guidance, and defect replacement or refund policies. Our QC lab ensures every bearing meets precision standards before shipment, and with production capacity exceeding 1,000,000 units annually, we maintain stable supply even for high-volume orders.
Packaging & Shipping
- Carton and pallet packaging for secure transportation
- Sample lead time: 3–5 days; bulk delivery: 5–15 days
- Multiple shipping options including express (DHL, FedEx) and standard freight
- Free samples available (buyer covers freight)
- 1pc MOQ for standard items, supporting urgent maintenance needs
Get Your HK4520 Bearings Shipped Fast
Don’t let equipment downtime impact your productivity. Whether you need a single replacement bearing or bulk order for production, we ensure prompt delivery to minimize operational disruptions. With our 3–7 day delivery time for standard items, you can get your machinery back online quickly.
Frequently Asked Questions
Q: Are these genuine HK4520 bearings?
A: Yes, we manufacture all bearings in-house with strict quality control, supported by ISO9001 certification. Each product meets industry standards and can be traced through our production records.
Q: How do I confirm if the HK4520 is compatible with my equipment?
A: Provide your equipment model, application details, or required dimensions, and our technical team will verify compatibility and offer guidance on precision and clearance selection.
Q: What warranty do you offer for the HK4520 bearings?
A: We provide a 12-month global warranty covering manufacturing defects. If a bearing fails under normal operating conditions, we offer free replacement or refund.
Q: What is the minimum order quantity for the HK4520?
A: We accept orders starting from 1 piece for standard items, making it easy to source emergency replacements or test samples.
Q: How quickly can you ship the HK4520 bearings?
A: Standard items are available for shipment within 3–7 days. For bulk orders, delivery typically takes 5–15 days depending on quantity.
Q: How can I ensure the bearings I receive are not counterfeit?
A: Our bearings are packaged with clear labeling and batch codes. We can provide production and quality test reports upon request to verify authenticity.
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