Wholesale Single Row Angular Contact Ball Bearings

Single Row Angular Contact Ball Bearings – Precision and Load Control

As a Wholesale Single Row Angular Contact Ball Bearings manufacturer, Shanghai Yinin Bearing & Transmission Company supplies a focused range of 7000, 7200, 7300, and 7900 series bearings. These are designed for applications where combined radial and axial loads must be handled with predictable stiffness and low runout. Our production integrates grinding, super-finishing, and inspection steps to deliver consistent geometry and material quality.

We serve machine tool builders, pump manufacturers, gearbox integrators, and automotive component suppliers. Our engineering team works from your operating point to select the correct contact angle, cage design, and precision class. With over 20 years in the bearing field and an integrated factory in Jiangsu, we control the process from steel selection to final measurement.

Available Series and Application Fit

Each series in our single row angular contact ball bearing line addresses a different load and speed profile. The table below summarizes the standard range and typical uses.

For applications requiring higher axial load in one direction, a larger contact angle (e.g., 40°) is preferred. For high-speed operation with lighter axial loads, we recommend 15° or 25° variants. Our engineers can help you select the correct series and preload arrangement for your assembly.

Material and Manufacturing Quality

We manufacture single row angular contact ball bearings in chrome steel (GCr15) as standard, with stainless steel (AISI 440C) available for corrosive environments. Rings are heat-treated to achieve a hardness of 60–66 HRC, and balls are grade 10 or better for smooth operation. Our factory in Jiangsu is equipped with precision grinders and super-finishing machines to control raceway curvature and surface finish.

Each production batch undergoes dimensional inspection, vibration testing, and noise checks. We follow a process-level quality system that includes in-process gauging and final acceptance per ISO standards. For critical applications, we can provide material certificates and inspection reports.

Configuration Options and Customization

Our single row angular contact ball bearings are available in open, shielded (ZZ), or sealed (2RS) versions. Cage options include pressed steel, machined brass, or polyamide (PA66) depending on speed and temperature requirements. We also supply matched pairs (DB, DF, DT) for applications needing higher stiffness or moment load capacity.

• Preload: Light, medium, or heavy preload can be set at the factory to suit spindle or gearbox requirements.
• Precision classes: We offer P0, P6, P5, and P4 accuracy grades, with P4 available for high-speed spindles.
• Non-standard sizes: Custom bore, outer diameter, or width dimensions can be produced for OEM projects.
• Special materials: Hybrid bearings with ceramic balls are available for extreme speed or insulation requirements.

Integration and Installation Support

We understand that bearing performance depends on correct mounting, shaft and housing fits, and lubrication. Our technical team provides mounting recommendations, including recommended fits for common shaft and housing tolerances, and guidance on axial clearance or preload adjustment. We can also supply bearings pre-filled with the appropriate grease for your operating temperature range.

For automated assembly lines, we ensure consistent dimensional accuracy and runout so that your robots and presses can handle our bearings without issues. We can package bearings individually or in bulk, with options for anti-corrosion wrapping and export-grade cartons.

Quality Assurance and Testing

Every bearing is inspected after each major manufacturing step. Final inspection includes measurement of bore and outside diameter, width, radial runout, and axial runout. Vibration velocity is measured to ensure smooth running, and noise is checked in a controlled environment. For high-precision series, we also measure contact angle and preload to ensure consistency.

We maintain a separate QC center that performs random audits on finished batches. If your application requires specific testing, such as temperature rise or load-life testing, we can coordinate with our lab to validate the design before mass production.

Information We Use to Configure Your Solution

To prepare an accurate quotation and technical proposal, we need the following project details:

• Bearing series and size (e.g., 7205, 7308) or shaft diameter and housing bore.
• Operating speed (RPM) and load conditions (radial, axial, moment).
• Required contact angle and precision class.
• Lubrication type (grease or oil) and expected temperature range.
• Mounting arrangement (single, paired, or multiple bearings).
• Environmental factors (humidity, contamination, corrosive media).
• Annual quantity and target delivery schedule.

With this information, we can recommend the most cost-effective series and configuration, and provide a delivery commitment based on our production capacity.

Frequently Asked Questions

What is the difference between 7000 and 7200 series?

The 7000 series is lighter and designed for higher speed applications with lower radial load. The 7200 series has a larger cross-section and can handle higher radial and axial loads, making it suitable for heavier spindles and gearboxes.

Can you supply bearings with a 40-degree contact angle?

Yes, we offer 40-degree contact angle bearings in the 7200 and 7300 series. These are ideal for applications with significant axial load, such as ball screws and thrust-loaded spindles.

Do you provide matched pairs for preloaded assemblies?

Yes, we can supply matched pairs in DB, DF, or DT arrangements with specified preload. Each pair is measured and marked to ensure consistent axial clearance or preload.

What is the minimum order quantity?

For standard sizes, our minimum order is 100 pieces. For non-standard or custom bearings, we can discuss smaller quantities for prototype development.

How do you ensure quality for large wholesale orders?

We perform full inspection on critical dimensions and vibration for every batch. For large orders, we use statistical process control and provide inspection reports upon request.