Qj306 Qjf207 Qj307 Qjf208 Pillow Block 1688 China High Precision Single Row Angular Contact Ball Bearings 7005c High Speed for Cars Precision Rating

Product Description

Product Description

Angular Contact Ball Bearings: Core Features & Applications

Core Features
Capable of simultaneously bearing radial loads and unidirectional axial loads. A larger contact angle results in stronger axial load capacity. Pair installation allows for bidirectional axial load bearing and axial positioning.

The raceway and steel balls have point contact, resulting in high limiting speeds, suitable for high-speed, precision applications. Strict preload control is required; preload improves rigidity and suppresses vibration, making it suitable for high-precision rotation.

Compact structure, available in single-row, double-row, and four-point contact types. Cylindrical bores are commonly used, but tapered bores are also available to suit different installation and interference fit requirements.

High requirements for coaxiality, installation accuracy, and bearing housing rigidity. Angular deviations or insufficient rigidity can easily lead to uneven loading, excessive temperature rise, and premature failure.

Lubrication options include grease lubrication (low to medium speeds) or oil lubrication (high speeds/high temperatures). Sealing/dustproof structures are available to suit different cleaning and temperature requirements.

Typical Application Scenarios

Machine Tool Industry – Spindle units, lead screw supports, high-speed grinding machines/machining centers; core compatibility reasons include high speed and precision, high rigidity, ability to withstand radial + axial composite loads, and high positioning accuracy after paired preload.

Motor Industry – High-speed servo motors, spindle motors, generator bearings; core compatibility reasons include high speed and low vibration, ability to withstand axial electromagnetic thrust, and long-term stable operation.

Automotive Industry – High-speed transmission shafts, turbochargers, steering systems; core compatibility reasons include high-speed operating conditions, compact space, and tolerance to temperature fluctuations.

General Machinery – Compressors, water pumps, and improved equipment operating accuracy and stability.

Aerospace – Aero-engine accessories, helicopter rotor systems, precision instruments;and meeting reliability requirements under extreme operating conditions.

Main product

Company Profile

Shandong Boli Bearing Co., Ltd was established in 2004. With a factory area of over 7,000 square meters, it is a comprehensive digital modern factory enterprise integrating production, design, R&D, and warehousing. We have our own brand DABL, and can also provide customized branding services for clients.

The company's main products include high-end spherical roller bearings (types CA, CC, MB, MA, E, E1, EAE4), cylindrical roller bearings, tapered roller bearings, thrust roller bearings, deep groove ball bearings, self-aligning ball bearings etc. We are committed to providing customers with affordable high-end bearings. Our products meet P0, P6, and P5 quality grades, suitable for specialized applications such as mining machinery, fans, coal mining equipment, steel machinery, textile machinery, lifting machinery, gear reduction machinery, pumps, cement, agricultural machinery, elevators, and more.

With import and export rights, our DABL Bearings have been exported to Australia, Russia, Pakistan, South Africa, and Canada etc. We have passed ISO 9001:2014 Quality Management System certification, CE Certification, and AAA credit enterprise certification, while implementing comprehensive quality control measures to provide superior products and services to global clients.

We sincerely invite you to visit our factory and hope to establish a good, mutually beneficial long-term business relationship with you.

Corporate advantage

Certifications

Exhibition

Packaging & Shipping

FAQ

1. What is your company's minimum order quantity? 
Standard bearings are in stock. MOQ is 20–100 sets (based on size/specs). Bulk/long-term clients get flexible MOQ, better prices and guaranteed quality. Special needs negotiable. 

2. Can you accept OEM and customization? 
Yes, it's our core strength. Our R&D team and CNC equipment make non-standard bearings per your drawings/samples (size, seal, grease, precision, etc.). Send details for solutions and quotes.

3. Can I become your agent? 
We welcome global agents. Benefits: full product line, competitive prices, technical support, market info, brand authorization. Eligibility depends on your experience, sales capacity and business plan. Submit company background & market plan via "Contact Us" for details.

4. Can you provide samples free of charge? 
Standard samples: free, you pay shipping. Custom/high-value samples: fee refundable on qualifying orders.

5. Are you a factory or a trading company? We are a 20+ year manufacturer. Full production control ensures stable quality, timely delivery, and strong customization. We also have a professional foreign trade team.

6. What is the warranty period for your products? 
12-month warranty (special terms for harsh conditions), starting from port departure. Covers material/manufacturing defects. ISO 9001 certified, with installation/usage guidance.

7. Can you tell me your delivery time? 
In-stock standard goods: 7–15 days shipment. Custom/large orders: 30–45 days (per complexity). Exact date confirmed on order, with full follow-up.

8.Can you provide technical support? 
Yes. Our engineers offer selection guidance, installation/maintenance advice, troubleshooting and after-sales solutions. Key focus: oil gap, operating conditions, installation, selection, maintenance.

9. Which international standards do your products meet?
Complies with ISO/ABEC (1/3/5/7) for dimension/precision; GCr15 steel for materials; ISO 9001:2015 for quality. SGS reports available on request.  

10. What are the main product categories and market areas your factory produces? 
Full range of rolling bearings, high-end ones (outer diameter 20–1000mm) included. Applications: textiles, steel, motors, pumps, mining, papermaking, elevators, agricultural machinery etc.