Product Specifications
| Parameter |
Details |
| Model NO. |
NJ2238, NJ428, NJ2224 |
| Product Name |
Cylindrical Roller Bearing |
| Structure |
Cylindrical |
| Outer Dimension |
Large (200-430mm) |
| Specification |
110*200*53 mm |
| Material |
Bearing Steel |
| Precision Rating |
P0, P6, P5, P4, P2 |
| Load Direction |
Radial Bearing |
| Number of Row |
Single Row |
| Separated |
Separated |
| Seals Type |
Open |
| Spherical |
Non-Aligning Bearings |
| Lubricate |
Oil, Grease, Dry |
| Service |
OEM, ODM |
| Trademark |
NTN, NSK, NMB, Koyo, NACHI, Timken |
| Origin |
China |
| HS Code |
8482500090 |
Application Industries
| Industry |
Typical Equipment |
| Manufacturing |
CNC Machine Tools, Precision Spindles, Machining Centers |
| Industrial Machinery |
Grinders, Lathes, Milling Machines |
| Automotive |
Transmission Systems, Gearboxes |
| Heavy Machinery |
Presses, Rollers, Conveyors |
Eliminate Spindle Downtime with NJ2238 NJ428 NJ2224 High Precision Cylindrical Roller Bearings
Machine tool operators know the frustration: unexpected spindle failure halts production, eating into profits with every minute of downtime. Low-quality bearings often cause premature wear, while sourcing genuine high-precision replacements can mean long lead times and minimum order quantities that don’t fit urgent repair needs. Mismatched bearings or incorrect precision grades further compromise machining accuracy, leading to scrapped parts and rework costs.
Precision Engineered Cylindrical Roller Bearings for Critical Machine Tool Spindles
Our NJ2238, NJ428, and NJ2224 cylindrical roller bearings are designed to solve these challenges. As an integrated manufacturer with ISO9001 and ISO14001 certifications, we produce P4 precision bearings that meet the strict demands of machine tool spindles. These bearings deliver the radial load capacity and rotational accuracy needed for high-speed machining, with separated inner and outer rings allowing easy installation and maintenance. Whether you’re replacing a worn bearing in a CNC lathe or upgrading a grinding machine spindle, our standard items are available with a 1pc MOQ to support both emergency repairs and scheduled maintenance.
Optimal Performance in High-Speed Machining Environments
Cylindrical roller bearings excel in applications requiring high radial load capacity and precise shaft guidance—key requirements for machine tool spindles. The NJ series design, with its single row of cylindrical rollers and machined brass cage, minimizes friction and heat generation during high-speed rotation. This makes them ideal for continuous-duty operations in automotive part manufacturing, aerospace component machining, and precision mold making. When paired with proper lubrication (oil, grease, or dry systems), these bearings maintain stability even under varying loads, ensuring consistent cutting performance and extending spindle life.
Technical Advantages That Drive Machining Precision
The performance of these bearings is defined by critical technical features. Their P4 precision rating ensures tight tolerances for radial runout and axial clearance, directly translating to improved surface finish on machined parts. The separated structure allows for easy mounting and dismounting, reducing maintenance time and labor costs. Constructed from high-grade bearing steel, they offer excellent wear resistance and durability, even in demanding environments. With outer dimensions in the large category (200-430mm), these bearings provide the robust support needed for heavy-duty spindles, while their open design allows for effective lubrication circulation—essential for heat dissipation in high-RPM applications.
Why Precision and Authenticity Matter for Your Bottom Line
Choosing genuine high-precision bearings over counterfeit or low-grade alternatives directly impacts your total cost of ownership. Inferior bearings may save on initial purchase price but often fail prematurely, leading to unplanned downtime, expensive spindle repairs, and lost production. A single spindle failure in a busy machine shop can cost thousands in lost revenue per day. Our bearings, backed by a 12-month global warranty, are manufactured to strict quality control standards, ensuring consistent performance and reliability. By investing in P4 precision cylindrical roller bearings, you reduce the risk of catastrophic failures, minimize maintenance costs, and maintain the machining accuracy your customers demand.
Your Reliable Partner for Bearing Solutions
With over 18 years of experience serving global buyers, Jinan Saifan Bearing combines manufacturing expertise with customer-focused service. Our in-house R&D and QC lab ensure every bearing meets international standards, while our flexible order policies—including 3–5 day sample lead times and 5–15 day bulk delivery—keep your operations running smoothly. We offer free technical guidance to help you select the right bearing for your application, and our defect replacement/refund policy provides peace of mind. As a trusted supplier to industrial equipment manufacturers across Europe, America, and Southeast Asia, we understand the importance of stable supply and competitive pricing for your long-term success.
Packaging & Shipping
- Secure carton packaging with pallet reinforcement for bulk orders
- 3–5 day lead time for samples, 5–15 day delivery for bulk orders
- Multiple shipping options: DHL, FedEx, UPS, air freight, and sea freight
- Real-time tracking provided for all shipments
- 1pc MOQ available for standard items to support emergency repairs
Get Your Machine Tools Back to Peak Performance
Don’t let spindle downtime derail your production schedule. Whether you need a single NJ2238 for an emergency repair or a bulk order of NJ428 bearings for planned maintenance, we’re ready to fulfill your request. Send us your bearing型号, application details, and quantity, and our team will provide a prompt quote—helping you minimize downtime and maximize productivity.
Frequently Asked Questions
Q: Are these bearings genuine and traceable?
A: Yes, we supply authentic bearings and provide full traceability documentation. Our manufacturing processes are ISO9001 and ISO14001 certified, ensuring quality and reliability.
Q: How do I confirm if the NJ2224 bearing fits my machine tool spindle?
A: Provide your machine model or spindle specifications (bore diameter, outer diameter, width), and our technical team will verify compatibility and offer free选型 support.
Q: What is the warranty period for these cylindrical roller bearings?
A: We offer a 12-month global warranty covering manufacturing defects. Defective products will be replaced or refunded at no additional cost.
Q: What is the minimum order quantity for standard bearings?
A: We accept 1pc MOQ for standard items, making us ideal for emergency repairs and small-batch requirements.
Q: How quickly can I receive my order?
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Tags:
Cylindrical Roller Bearings
high precision bearings
Machine Tool Spindles Bearings
NJ2224 Machine Tool Spindle Bearing
NJ2238 Cylindrical Roller Bearing
NJ428 High Precision Bearing
P4 Precision Bearings
P4 Precision Cylindrical Roller Bearings for Machine Tools
