Product Specifications
| Parameter |
Details |
| Model NO. |
634, 634-2Z, 634-2RS |
| Rows Number |
Single |
| Load Direction |
Radial Bearing |
| Material |
Bearing Steel |
| Contact Angle |
0° |
| Specification |
4×16×5mm |
| Trademark |
NSK |
| Origin |
Germany, Sweden, Japan |
| HS Code |
8482102000 |
Application Industries
| Industry |
Typical Equipment |
| Industrial Manufacturing |
CNC Machine Tools, Spindles, Gearboxes, Electric Motors |
| Home Appliances |
Washing Machines, Air Conditioners, Refrigeration Compressors |
| Power Tools |
Drills, Grinders, Small Pneumatic Equipment |
| Office Machinery |
Printers, Copiers, Conveyors |
Stop Equipment Downtime with High Precision Deep Groove Ball Bearing 634 Series
Nothing halts production faster than a bearing failure in critical machinery. Industrial operators know the cost of unexpected downtime—lost productivity, emergency repairs, and missed deadlines. When sourcing bearings like the 634, 634-2Z, or 634-2RS, the challenge often lies in finding reliable suppliers who can deliver genuine, high-precision parts without excessive minimum order requirements or long lead times.
Genuine High Precision 634 Bearings, Ready for Immediate Shipment
Our High Precision Deep Groove Ball Bearing 634 series solves these pain points by combining authentic NSK quality with flexible supply. As a trusted bearing supplier with decades of export experience, we maintain stock of standard bearings like the 4x16x5mm 634 variants, supporting MOQ as low as 1 piece for emergency repairs. Whether you need the open-type 634, shielded 634-2Z, or sealed 634-2RS, each unit meets NSK's strict manufacturing standards, ensuring compatibility with industrial machinery, home appliances, and power tools.
Engineered for Reliable Performance in Demanding Applications
The 634 series deep groove ball bearings excel in radial load applications where precision and durability matter. With a contact angle of 0°, they handle pure radial loads efficiently, making them ideal for high-speed rotating components in CNC machine tools, electric motors, and small gearboxes. The 634-2Z features metal shields to protect against dust and debris, while the 634-2RS uses rubber seals to retain lubrication and prevent contamination—critical for equipment operating in manufacturing environments or outdoor settings.
Key Technical Features That Ensure Long Service Life
Crafted from high-grade bearing steel, the 634 series delivers stable performance across industrial conditions. The single-row design balances load capacity and compact size (4mm bore, 16mm outer diameter, 5mm width), fitting into space-constrained assemblies. For applications requiring maintenance-free operation, the 634-2RS seal design reduces the need for frequent lubrication, while the 634-2Z offers lower friction for high-speed scenarios. All variants adhere to international standards, ensuring consistent fit and function with existing equipment.
Avoid Hidden Costs: Why Genuine NSK Bearings Matter
Choosing counterfeit bearings may seem cost-effective initially, but the risks far outweigh the savings. Non-genuine 634 bearings often fail prematurely due to substandard materials and poor manufacturing, leading to equipment damage, unplanned downtime, and safety hazards. Genuine NSK 634-2RS and 634-2Z bearings, by contrast, undergo rigorous testing to meet ISO industrial standards, ensuring longer service life and reducing total cost of ownership. Our strict quality control—from incoming material inspection to full-process production supervision—guarantees that every bearing performs as expected.
Why Global Buyers Choose Saifan for Bearing Supply
With over 18 years in the industry, Saifan Bearings has built a reputation for reliability across Europe, North America, and Southeast Asia. We hold ISO 9001:2015 and ISO 14001 certifications, and our in-house laboratory conducts dimensional, noise, and vibration tests to ensure each bearing meets precision grade P0-P4 standards. As an authorized supplier of genuine NSK bearings, we provide full traceability for every unit. Our technical team offers free guidance on selection and installation, and our 12-month warranty covers manufacturing defects, with replacement or refund options available for qualified issues.
Packaging & Shipping
- Original NSK packaging with protective inner boxes and outer carton reinforcement
- Sample orders shipped within 3-5 working days; bulk orders within 5-15 working days
- Multiple logistics options: DHL, FedEx, UPS, air freight, or sea freight based on urgency
- Real-time tracking number provided once shipped for full supply chain visibility
- Flexible order quantities: 1 piece MOQ for standard bearings, ideal for emergency repairs
Secure Your 634 Bearings Today
Don’t let bearing issues disrupt your operations. Whether you need a single 634-2RS for a broken machine or bulk 634-2Z units for production lines, we have the inventory and expertise to meet your needs. Send us your bearing型号, application details, and quantity, and our team will provide a competitive quote within 24 hours—so you can get back to productive work faster.
Frequently Asked Questions
Q: Are these genuine NSK bearings?
A: Yes, we are an authorized supplier of genuine NSK bearings. Each unit is sourced directly from NSK and comes with full traceability documentation to verify authenticity.
Q: How do I confirm if the 634 series is compatible with my equipment?
A: Provide your equipment model or technical specifications (load, speed, operating conditions), and our technical team will confirm the correct bearing type and specifications for your application.
Q: What is the warranty policy for these bearings?
A: We offer a 12-month warranty from the date of receipt. Manufacturing defects are covered by free replacement or refund, with support provided for qualified issues.
Q: What is the minimum order quantity for the 634 series?
A: The minimum order quantity is 1 piece for standard bearings, allowing flexibility for emergency repairs or small-scale projects.
Q: How quickly can I receive my order?
A: Sample orders are shipped within 3-5 working days, and bulk orders within 5-15 working days. We offer express shipping options for urgent requirements.
Q: How can I verify the authenticity of the bearings upon receipt?
A: Genuine NSK bearings feature laser-etched markings, original packaging with security labels, and serial numbers that can be verified through NSK's official channels. We also provide detailed traceability documents with each order.
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Send your bearing designation, application details, and quantity — we'll respond within 24 hours.
