Abstract: SKF four-row cylindrical roller bearings, renowned for their outstanding performance and reliability, stand as a leading choice in the industrial realm, offering steadfast support to various types of equipment. This article introduces the model features of SKF four-row cylindrical roller bearings and their extensive applications across different fields, aiming to provide engineers with better selection references.
SKF (Swedish: Svenska Kullagerfabriken) four-row cylindrical roller bearings have long been renowned for their exceptional performance and reliability. As one of the top choices for various types of equipment, they provide steadfast support, ensuring stable operation and efficient production. Below, we will detail the model features of SKF four-row cylindrical roller bearings and their applications in different fields.
Model Features
- NNF Series:
- The NNF series of four-row cylindrical roller bearings feature a full complement of rollers, capable of bearing significant radial loads.
- They possess outstanding load-carrying capacity, suitable for high-load, low-speed conditions.
- Available in various sizes and specifications to meet the requirements of different equipment.
- NNU Series:
- The SKF NNU series of four-row cylindrical roller bearings feature a semi-complement of rollers, offering higher rigidity.
- Suitable for applications requiring high-speed rotation and higher rigidity.
- Precision manufacturing processes and high-quality materials ensure stability and reliability.
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Designation Principal dimensions Basic load ratings Attainable speeds dynamic static Grease lubrication Oil-air lubrication d[mm] D[mm] B[mm] C[kN] C0[kN] [r/min] [r/min] SKF NNU 49/670 B/SPW33X 670 900 230 4 950 13 700 700 600 SKF NNU 49/500 B/SPW33X 500 670 170 2 330 6 100 950 1 100 SKF NNU 4920 B/SPW33 100 140 40 128 255 5 600 6 300 SKF NNU 4921 B/SPW33 105 145 40 130 260 5 300 6 000 SKF NNU 4922 B/SPW33 110 150 40 132 270 5 300 6 000 SKF NNU 4924 B/SPW33 120 165 45 176 340 4 800 5 300 SKF NNU 4926 B/SPW33 130 180 50 187 390 4 300 4 800 SKF NNU 4928 B/SPW33 140 190 50 190 400 4 000 4 500 SKF NNU 4930 B/SPW33 150 210 60 330 655 3 800 4 300 SKF NNU 4932 B/SPW33 160 220 60 330 680 3 600 4 000 SKF NNU 4934 B/SPW33 170 230 60 336 695 3 400 3 800 SKF NNU 4936 B/SPW33 180 250 69 402 850 3 000 3 400 SKF NNU 4938 B/SPW33 190 260 69 402 880 2 800 3 200 SKF NNU 4940 B/SPW33 200 280 80 484 1 040 2 600 3 000 SKF NNU 4944 B/SPW33 220 300 80 512 1 140 2 400 2 800 SKF NNU 4948 B/SPW33 240 320 80 528 1 220 2 200 2 600 SKF NNU 4952 B/SPW33 260 360 100 748 1 700 2 000 2 400 SKF NNU 4956 B/SPW33 280 380 100 765 1 800 1 900 2 200 SKF NNU 4960 B/SPW33 300 420 118 1 020 2 360 1 800 2 000 SKF NNU 4964 B/SPW33 320 440 118 1 060 2 500 1 700 1 900 SKF NNU 4924 B/SPW33 120 165 45 176 340 4 800 5 300 SKF NNU 4926 B/SPW33 130 180 50 187 390 4 300 4 800 SKF NNU 4928 B/SPW33 140 190 50 190 400 4 000 4 500 SKF NNU 4930 B/SPW33 150 210 60 330 655 3 800 4 300 SKF NNU 4932 B/SPW33 160 220 60 330 680 3 600 4 000 SKF NNU 4934 B/SPW33 170 230 60 336 695 3 400 3 800 SKF NNU 4936 B/SPW33 180 250 69 402 850 3 000 3 400 SKF NNU 4938 B/SPW33 190 260 69 402 880 2 800 3 200 SKF NNU 4940 B/SPW33 200 280 80 484 1 040 2 600 3 000 SKF NNU 4944 B/SPW33 220 300 80 512 1 140 2 400 2 800 SKF NNU 4948 B/SPW33 240 320 80 528 1 220 2 200 2 600 SKF NNU 4952 B/SPW33 260 360 100 748 1 700 2 000 2 400 SKF NNU 4956 B/SPW33 280 380 100 765 1 800 1 900 2 200 SKF NNU 4960 B/SPW33 300 420 118 1 020 2 360 1 800 2 000 SKF NNU 4964 B/SPW33 320 440 118 1 060 2 500 1 700 1 900
Application Fields
- Steel Industry:
- In the steel manufacturing process, equipment such as rolling mills and continuous casting machines, which endure high loads and vibrations, often employ SKF four-row cylindrical roller bearings to ensure stable operation.
- Mining Industry:
- Mining equipment such as crushers and conveyors, which operate under prolonged high-load conditions, require reliable bearing support, which SKF four-row cylindrical roller bearings can provide.
- Power Industry:
- Power generation equipment such as hydroelectric generators and wind turbines, which operate under high-speed rotation, demand excellent stability and durability, qualities that SKF four-row cylindrical roller bearings can deliver.
Conclusion
SKF four-row cylindrical roller bearings, with their outstanding performance and reliability, play a vital role in industrial equipment, providing steadfast support to various types of machinery. Whether in the steel, mining, or power industries, engineers can trust SKF four-row cylindrical roller bearings to ensure efficient equipment operation. Choosing SKF four-row cylindrical roller bearings means choosing stable support and selecting the key to success.admin@wsbearing.com