Durable Radial Spherical Plain Bearing with Brass Cage

Product Description

Product Description

Knuckle Bearings: Core Features & Applications

Core Features:

Features a spherical sliding contact structure, allowing for relatively large misalignment angles (typically 2°–10°, some models up to 30°), compensating for shaft and bearing housing installation errors, shaft deflection, and housing deformation.

Primarily bears radial loads; some types (such as angular contact spherical plain bearings) can withstand bidirectional axial loads or combined loads; capable of withstanding impact loads and vibrations, suitable for heavy-duty applications.

Compact structure, available in radial, angular contact, and thrust types; no rolling elements, operates through spherical sliding friction, requiring no high-precision machining, and easy to install.

Higher coefficient of friction than rolling bearings, lower limiting speed, primarily used for low-speed oscillating, rotating, or reciprocating motion applications; requires regular lubrication (primarily grease lubrication, oil lubrication optional for high-speed/high-temperature applications).

Can be paired with different materials (e.g., steel-steel, steel-bronze, steel-PTFE composites) to meet various application requirements such as wear resistance, corrosion resistance, and self-lubrication.

Typical Application Scenarios:

Construction Machinery – Boom joints, stick pins, slewing bearings, and hydraulic cylinder ends of excavators, loaders, and cranes; the core suitability is due to significant angular misalignment, heavy loads and impacts, and harsh operating conditions.

Automotive Industry – Suspension systems, steering mechanisms, universal joints of drive shafts, and shock absorbers; the core suitability is due to compact space requirements, allowing for sway angles, and the ability to withstand impact loads.

Aerospace – Aircraft landing gear, helicopter rotor systems, servo motors, the core suitability is due to lightweight design, and tolerance to extreme temperatures and vibrations.

General Machinery – Roller joints of papermaking machines, textile machines, and printing machines; swaying mechanisms in packaging machinery;  and stability under heavy loads.

Medical Devices – Operating tables, rehabilitation equipment,the core suitability is due to flexible angle adjustment, noiseless operation, self-lubrication, and good biocompatibility.

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.