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Alignment Needle Roller Bearings, Without An Inner Ring

Materials and application references for QIBR alignment needle roller bearings without an inner ring in commercial applications:

QIBR alignment needle roller bearings without an inner ring have a self-aligning function. Their key feature is the absence of an inner ring, with the outer ring and needle rollers bearing and transmitting the load, simplifying the design.

The materials for QIBR alignment needle roller bearings without an inner ring include:

Bearing steel: The most used material, offering high load capacity and excellent wear resistance, suitable for most applications.

Stainless steel: Provides good corrosion resistance and is ideal for use in humid or corrosive environments.

Carbon steel: Less commonly used, mainly for low-end applications due to its low cost.

The choice of materials depends on specific application requirements, such as load capacity, corrosion resistance, and cost.

QIBR Model Selection

Filters

Наружный диаметр (d1)

Ширина (C)

Базовая динамическая нагрузка

Базовая статическая нагрузка

Диаметр под роликами (Fw)

Предел усталостной нагрузки (Pu)

NO.	Product Number	Наружный диаметр (d1)	Ширина (C)	Базовая динамическая нагрузка	Базовая статическая нагрузка	Диаметр под роликами (Fw)
1	RPNA15/28	12 mm	7.37 KN	9.15 KN	15 mm	1.08 KN
2	RPNA18/32	16 mm	12.8 KN	17.6 KN	18 mm	2.12 KN
3	RPNA20/35	16 mm	13.2 KN	19.3 KN	20 mm	2.28 KN
4	RPNA25/42	20 mm	19 KN	32.5 KN	25 mm	4 KN
5	RPNA30/47	20 mm	22.9 KN	38 KN	30 mm	4.8 KN
6	RPNA35/52	20 mm	24.6 KN	45 KN	35 mm	5.6 KN
7	RPNA40/55	20 mm	26.4 KN	51 KN	40 mm	6.3 KN
8	RPNA45/62	20 mm	27.5 KN	57 KN	45 mm	7.1 KN

Features and advantages of QIBR alignment needle roller bearings without an inner ring

QIBR alignment needle roller bearings without an inner ring address several critical issues in diverse fields, mainly in the following areas:

1. Compact structure

Using needle rollers as rolling elements allows these bearings to handle large radial loads while being relatively small in size, making them suitable for installation in limited spaces, particularly in compact mechanical designs.

2. Low friction and high efficiency

Thanks to the precise design between the needle rollers and the cage, these bearings exhibit low friction losses, reducing heat generation and improving operational efficiency. This makes them suitable for high-speed and high-efficiency environments.

3. High durability

The cage stabilizes the position of the needle rollers, reducing contact and wear among them, thereby extending the bearing's lifespan. Proper clearance and precision design ensure stability and reliability during operation.

4. Low noise and vibration

The rational structure between the needle rollers and the cage minimizes contact among the rollers, reducing noise and vibration, and making them ideal for environments requiring low noise levels.

5. Adaptability to high-speed applications

With small needle roller shapes and reduced contact area, these bearings are well-suited for high-speed applications, effectively preventing excessive friction and overheating at high speeds.

Performance improvements and solutions for QIBR alignment needle roller bearings without an inner ring

1. Improved materials

High-performance material selection: Using materials with greater hardness, wear resistance, and corrosion resistance can significantly enhance bearing durability and stability.

2. Optimized cage design

Structural optimization: Enhancing the cage structure to achieve better needle roller arrangement and uniform load distribution. Optimizing the cage reduces needle roller collisions, improving operational stability and efficiency.

Reduced contact area: By refining the cage geometry and needle roller arrangement, contact areas among rollers are minimized, reducing friction and wear.

3. Enhanced lubrication performance

Efficient lubricants: Employing greases or oils suited for high-temperature and high-pressure environments ensures consistent lubricant performance during extended operations, reducing friction and improving durability.

4. Increased precision

Precision machining: Enhancing manufacturing accuracy minimizes errors between bearing components, ensuring more uniform and stable contact between needle rollers and the cage. This improves performance, extends lifespan, and reduces noise and vibration.

Main application areas of QIBR alignment needle roller bearings without an inner ring

1. Engines

Commonly used in engine components such as valve mechanisms, turbochargers, camshafts, and balance shafts, these bearings can withstand high loads while maintaining stable operation.

2. Agricultural machinery

Tillage and seeding equipment: Used in agricultural machinery to adapt to variable loads and angle deviations in soil, helping equipment maintain long-term stable operation.

Tractors and harvesters: Frequently used in transmission systems, lifting devices, and driving components in tractors and harvesters.

3. Mining and construction machinery

Excavators and cranes: These machines often encounter significant impact loads and angular misalignments. Self-aligning needle roller bearings effectively mitigate installation errors and ensure normal equipment operation.

Mining equipment: Widely used in heavy-vibration, high-load equipment such as crushers and screeners during mining operations.

4. Industrial transmission equipment

Gearboxes: In gearboxes and transmission devices, these bearings handle uneven loads caused by angular errors during transmission.

Chain and belt drive systems: Suitable for industrial production transmission devices, providing efficient power transmission.