Product Specifications
| Parameter |
Details |
| Model NO. |
7308AC, 7309AC, 7310AC, 7311AC |
| Separated |
Customized |
| Rows Number |
Customized |
| Load Direction |
Radial Bearing |
| Material |
Bearing Steel |
| Product Name |
Angular Contact Ball Bearing |
| Precision Rating |
P0, P6, P5, P4, P2 |
| Vibration |
Z1V1, Z2V2, Z3V3 |
| Feature |
Long Life, High Speed, Low Noise |
| Transport |
by Sea or by Air |
| Service |
OEM, ODM |
| Transport Package |
Carton Pallet |
| Specification |
customized |
| Origin |
China |
| HS Code |
8482102000 |
| Production Capacity |
1000000 |
Application Industries
| Industry |
Typical Equipment |
| Manufacturing |
High-Speed Machine Tool Spindles, Electric Motors |
| Industrial Machinery |
CNC Machines, Precision Lathes |
Eliminate Spindle Downtime with Precision Angular Contact Ball Bearings 7308AC-7311AC
Machine tool operators know the frustration of unexpected spindle failures—hours of production lost, missed deadlines, and costly repairs. Low-quality bearings often fail prematurely under high-speed rotation, while sourcing specific precision grades like P4 can mean long lead times and minimum order quantities that strain maintenance budgets.
High-Speed Performance You Can Rely On
Our Angular Contact Ball Bearings 7308AC, 7309AC, 7310AC, and 7311AC are engineered to solve these challenges. With precision ratings up to P4 and vibration levels as low as Z3V3, they deliver stable rotation at high speeds—critical for machine tool spindles and motor applications. Backed by our ISO9001-certified production facility and 16 years of manufacturing experience, we ensure consistent quality with flexible ordering: 1pc MOQ for standard items and 3–5 day sample lead times.
Engineered for High-Speed, Heavy-Duty Conditions
These bearings thrive in demanding environments where both radial and axial loads are present. The AC design (angular contact with 25° contact angle) provides the rigidity needed for precision machining, while the high-grade bearing steel construction ensures durability under continuous operation. Whether powering a CNC spindle running at 10,000 RPM or a motor in industrial equipment, they maintain low noise levels and minimal vibration, reducing wear on adjacent components.
Key Technical Features That Matter
Precision rating directly impacts performance: P4 grade bearings minimize runout and axial clearance, essential for maintaining machining accuracy. Vibration class Z3V3 ensures smooth operation, critical for reducing spindle noise and extending tool life. The customizable separated design allows for easy installation and maintenance, while the long-life feature—achieved through optimized heat treatment and cage design—reduces replacement frequency. These technical details translate to fewer production interruptions and lower total maintenance costs.
Why Compromising on Quality Costs More
Choosing non-certified bearings may save upfront, but the hidden costs add up. A single spindle failure due to bearing collapse can cost thousands in downtime and repairs. Our bearings undergo rigorous QC testing in our in-house lab, from material composition checks to dimensional accuracy verification. With ISO14001 certification and a 12-month global warranty, we stand behind every product—offering defect replacement or refund if issues arise. Investing in reliable bearings lowers long-term operational costs by minimizing unplanned downtime.
Your Trusted Bearing Partner Since 2005
Jinan Saifan Bearing has served global buyers across Europe, America, Southeast Asia, and the Middle East for over 16 years. Our full R&D capabilities and OEM/ODM customization support mean we can adapt to your specific requirements, from custom dimensions to specialized cage materials. We maintain a large inventory of standard bearings, enabling 5–15 day bulk delivery, and offer free technical guidance to help you select the right bearing for your application. Our transparent supply chain ensures every product is traceable, with documentation available upon request.
Packaging & Shipping
- Carton pallet packaging with protective inner wrapping to prevent damage during transit
- Sample lead time: 3–5 days for standard items
- Bulk delivery: 5–15 days after order confirmation
- Shipping options: Sea freight for large orders, air freight for urgent requirements
- 1pc MOQ available for standard bearings, supporting emergency maintenance needs
Get Your Bearings Delivered Fast
Don’t let spindle issues slow down your production. Send us your bearing model (7308AC, 7309AC, 7310AC, or 7311AC), application details (speed, load, precision requirements), and quantity, and we’ll provide a quote within 24 hours. With free samples available (buyer covers freight), you can test performance before committing to a full order.
Frequently Asked Questions
Q: Are these bearings original and certified?
A: We are an integrated manufacturer with ISO9001 and ISO14001 certifications. All bearings are produced in our own facility and undergo strict quality control. We also supply authentic NSK/INA bearings as part of our product range.
Q: How do I confirm if the 7308AC-7311AC series fits my machine tool spindle?
A: Provide your spindle model, required precision grade, and operating speed, and our technical team will verify compatibility and recommend the optimal bearing configuration.
Q: What is your warranty policy?
A: We offer a 12-month global warranty on all manufactured bearings. If a defect is found, we provide free replacement or a full refund.
Q: What is the minimum order quantity?
A: Standard items have a 1pc MOQ, making it easy to source single bearings for maintenance or testing.
Q: How quickly can you ship?
A: Samples ship in 3–5 days, bulk orders in 5–15 days. We use reliable logistics partners for sea or air transport, with tracking provided.
Q: Do you offer technical support for installation?
A: Yes, our team provides free technical guidance on bearing installation, preload adjustment, and maintenance to ensure optimal performance.
Ready to order or need a quote?
Send your bearing designation, application details, and quantity — we'll respond within 24 hours.
