Four-Point Contact Ball Bearing

At Shaoxing Shangyu Flight Seiko Machinery Co Ltd, we specialize in engineering high performance bearing solutions that drive modern industrial machinery. Our Four-Point Contact Ball Bearings represent a pinnacle of spatial efficiency and multi directional load management.

Designed as a single row angular contact ball bearing, this specialized structure features raceways capable of supporting axial loads in both directions alongside substantial radial forces. By employing a unique gothic arch groove design, each ball makes contact with the raceways at four distinct points. This allows a single four point contact bearing to replace a combination of two face to face or back to back angular contact bearings, significantly reducing your machinery design footprint and saving critical assembly space.

Key Structural Features and Engineering Precision

1. Single Row Structure with Double Row Functionality
   The inner and outer ring channels are precision ground into a unique shape that achieves four point contact under combined loads. This single row configuration successfully performs the operational duties traditionally assigned to more complex double row bearings.
2. Split Ring Design for Higher Load Capacity
   To maximize performance, the inner or outer ring is split into two independent pieces. This separable ring design allows our production line to insert a maximum complement of high grade steel balls into the raceway during assembly. More balls directly translate to a significantly higher radial and axial load carrying capacity for heavy duty operations.
3. Optimized Contact Angles for Ultimate Rigidity
   The engineered contact angle between the steel balls and the raceway channels is carefully set between 35 and 45 degrees. By fine tuning this contact angle based on your exact operational requirements, we optimize both the axial load bearing capacity and the overall structural rigidity of the system.

Technical Deep Dive and Advanced Knowledge

Four point contact ball bearings are uniquely qualified for applications where high axial stiffness and low axial clearance are critical. When subjected to pure axial load, the balls contact the rings at two points. Under combined radial and axial loads, the contact transitions to ensure smooth rotation without skidding.

For optimal performance in high speed or vibration prone environments, proper cross section alignment is essential. These bearings require strict adherence to mounting tolerances, which is why our engineering team delivers pre adjusted clearance and preloading options tailored to withstand moment loads and structural deflection.

Why Choose FTM as Your Manufacturing Partner

• Over Thirty Years of Technical Expertise: Founded in 2006, FTM brings more than three decades of practical design experience to the table, solving complex bearing challenges for global clientele.
• Non Standard Customization Specialists: We thrive where standard catalogs fail. FTM excels in designing and manufacturing custom non standard bearings customized to your specific space and load constraints.
• High Precision Import Substitution: Our manufacturing tolerances meet premium international benchmarks, allowing domestic and foreign buyers to replace expensive imported brands with our cost effective, high precision alternatives.
• Comprehensive Engineering Solutions: Beyond manufacturing, our dedicated technical support team partners with you from initial design blueprints to final machine integration across sectors like construction and textile processing.

Technical Specifications and Application Breakdown

Below is an overview of the operating capabilities and industrial sectors where our four point contact bearings deliver maximum reliability.

Frequently Asked Questions (FAQ)

1. What are the primary advantages of using a four point contact ball bearing over a standard angular contact bearing?
A four point contact ball bearing can handle heavy axial loads in both directions as well as moment loads within a very compact single row space. This eliminates the need to buy and install paired sets of traditional angular contact bearings, reducing your overall component costs, simplifying housing designs, and minimizing the total weight of your machinery.

2. Why does this bearing style feature a split inner or outer ring structure?
The split ring design is utilized to facilitate the assembly process. Because the ring is split into two pieces, it opens up the workspace to allow the insertion of a larger number of steel balls into the raceway. Having a higher volume of balls distributes the forces more evenly, which directly increases the load carrying capacity of the bearing.

3. In what industrial sectors do FTM four point contact bearings perform best?
Our bearings are highly successful in heavy machinery fields such as engineering machinery, mobile cranes, and excavators, where space is tight but loads are extreme. They are also widely utilized in high precision textile machinery, metallurgical equipment, and industrial gearboxes that require absolute stability during bidirectional thrusting.

4. Can FTM manufacture custom dimensions that are not found in standard bearing catalogs?
Yes, customization of non standard bearings is our primary strength. Supported by our team with over thirty years of technical design experience, we can customize the outer diameters, inner diameters, widths, and contact angles to match your specific blueprints or operating environments.

5. How does FTM ensure high precision quality that can substitute high end imported brands?
We achieve import substitution standards through rigorous control over raw materials, premium heat treatment processes, and state of the art grinding technology. Every production batch undergoes strict geometric and dimensional checks to ensure our precision levels, durability, and operational lifespans perfectly match or exceed market alternatives.