High-Quality Needle Roller Bearings Rna4914 Rna4915 Rna4916 Rna4917 Rna4918

Product Description

Zhejiang Judong Bearings Co., Ltd., established in [2016], is located in Zhejiang Province, China. We are a professional manufacturer and supplier of a wide range of bearing products. Our bearings are widely used in industries such as machinery manufacturing, automotive, electronics, home appliances, and industrial automation.
 

Copy: Made from high-quality steel and advanced manufacturing processes, needle roller bearings ensure an extended service life. Their low-maintenance design reduces equipment downtime, helping you boost productivity and lower operating costs.
Use Case: Ideal for mining machinery, heavy-duty equipment, and other high-load, high-wear environments.
Versatile and Widely Applicable
Copy: From the automotive industry to aerospace, from home appliances to power tools, needle roller bearings are the ideal choice for equipment across industries, thanks to their high load capacity, low friction, and compact design.
Use Case: Suitable for multi-industry promotions, emphasizing product versatility.
 Precision Manufacturing, Reliable Performance
Copy: Every needle roller bearing undergoes precision manufacturing and rigorous testing to ensure stable performance even under extreme conditions. Choosing needle roller bearings means choosing reliability and peace of mind.
Use Case: Suitable for precision machinery, high-end equipment, and other fields with high reliability requirements.

Energy-Efficient and Eco-Friendly
Copy: The low-friction design of needle roller bearings not only improves equipment efficiency but also reduces energy consumption. Choose needle roller bearings and contribute to green manufacturing and sustainable development.
Use Case: Suitable for eco-friendly themes or green manufacturing promotions.
 Success Stories
Copy: A renowned automotive manufacturer achieved a 15% increase in transmission efficiency and a 30% reduction in failure rates after adopting our needle roller bearings. Needle roller bearings-trusted for their proven performance.
Use Case: Suitable for sharing customer success stories to build trust.
 Quality Assurance, Superior Service
Copy: We not only provide high-quality needle roller bearings but also offer professional technical support and after-sales service. From selection to installation, we are with you every step of the way to ensure your equipment operates efficiently.
Use Case: Suitable for promotions emphasizing service and support.

 

 

Diversified Design: There are various design forms, including needle roller bearings with stamped outer rings, needle roller bearings with solid rings, and needle roller and cage assemblies. Different design forms can meet a wide range of application needs and installation conditions. For example, needle roller bearings with stamped outer rings have lower costs and are suitable for general industrial applications in mass production. In contrast, needle roller bearings with solid rings have higher strength and precision, making them suitable for high - load and high - precision scenarios.
Performance Advantages
High Load - Carrying Capacity: Due to the large contact area between the needle rollers and the raceways, needle roller bearings can withstand relatively large radial loads. Compared with other types of bearings of the same size, needle roller bearings can operate stably under higher loads, which is suitable for heavy - duty working conditions in construction machinery and agricultural machinery.
Regularly check the lubrication condition and replenish or replace the grease in a timely manner.Needle roller bearings, with their high load - carrying capacity, compact design, low friction, and economic efficiency, are widely used in the automotive, industrial machinery, aerospace, and other fields. Whether it is high - load or high - speed operation, needle roller bearings can provide efficient and stable solutions.

 

Needle roller bearings are a special type of rolling bearings, and their characteristics are determined by their own design and application scenarios. The following introduces their main characteristics from aspects such as structural design, performance, application scenarios, and maintenance costs:

Structural Design Features
Unique Needle Shape: The ratio of the length to the diameter of the needles used in needle roller bearings is usually large, generally between 3 and 10. This slender shape results in a relatively large contact area between the needles and the raceways, enabling the bearing to provide high load - carrying capacity in a small space.
Compact Structural Design: Due to the small diameter of the needles, the overall structure of needle roller bearings is more compact and takes up less space. This compact design makes them particularly suitable for applications with strict space requirements, such as automobile engines and transmissions.
Multiple Cage Forms: To guide and maintain the correct position of the needles, needle roller bearings are usually equipped with cages. Common cage forms include stamped cages and solid cages. Stamped cages are of lower cost and lighter weight, while solid cages have higher strength and stability, suitable for high - speed and heavy - load working conditions.
Separable Design: Some needle roller bearings adopt a separable design, which means that the inner ring, outer ring, and needle assembly can be installed and disassembled separately. This design makes installation and maintenance more convenient, especially in some situations where the bearings need to be replaced frequently.
Performance Features
 

Good High - Speed Performance: Through optimizing the shape, surface quality of the needles and the design of the cage, modern needle roller bearings can operate stably at relatively high speeds. The limiting speed of some high - speed needle roller bearings can reach tens of thousands of revolutions per minute.
Low Friction Coefficient: Needle roller bearings have a relatively small rolling friction coefficient, which can effectively reduce energy loss and improve transmission efficiency. This is particularly important for some equipment with high energy - efficiency requirements, such as electric vehicles and industrial robots.
High - Precision Operation: Guaranteed by precision manufacturing processes, needle roller bearings can achieve high - precision operation. This makes them widely used in applications that require precise transmission and positioning, such as CNC machine tools and measuring instruments.
Application Scenario Features
Wide Industry Applicability: Needle roller bearings are widely used in many industries, including automotive, aerospace, machine tools, construction machinery, agricultural machinery, and power tools. Different industries have different performance requirements for bearings, and needle roller bearings can meet these diverse needs through different designs and material selections.
Adaptability to Harsh Working Conditions: Some needle roller bearings have good sealing performance and corrosion resistance, enabling them to work normally in harsh working environments, such as high - temperature, humid, dusty, and chemically corrosive environments. For example, in mining machinery and construction machinery, needle roller bearings need to withstand a large amount of dust and sediment while having sufficient strength and wear resistance.
Maintenance Cost Features

Bearing Model	Bore Diameter (mm)	Outer Diameter (mm)	Width (mm)	Weight (kg, Approx.)
RNA4914	70	110	45	1.15
RNA4915	75	115	45	1.25
RNA4916	80	120	45	1.35
RNA4917	85	125	45	1.45
RNA4918	90	130	45	1.55