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Bearings for the Steel Industry

Bearings for the Steel Industry
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Bearings for the Steel Industry

Product catalog summary
Introduction
NSK is a prominent manufacturer of rolling bearings, operational since 1916, focusing on technologies in rolling bearings, linear systems, automotive components, and mechatronic systems. The company maintains high-quality standards and innovation through its global network and continuous research and development.

NSK's Commitment to Quality
NSK is dedicated to total quality management, renowned for its patent applications and advancements in tribology, material technology, analysis, and mechatronics.

Challenges in the Steel Industry
The steel industry faces harsh conditions like temperature variations and contamination. NSK provides specialized bearings to ensure reliability and durability under these conditions.

Innovations and Products
NSK's Sealed-Clean bearing, introduced in 1980, has been enhanced for better load capacity and reduced grease consumption. NSK offers a range of bearings for steel industry applications, including sinter machines and rolling mills.

Product Development and Testing
NSK's product development involves simulation, design, and material innovation to enhance operational life under harsh conditions, with rigorous testing to ensure reliability.

Specific Product Solutions
  • Sintering Equipment: Sealed-Clean bearings reduce maintenance costs by addressing premature failure and contamination.
  • BOFs and Converters: Ultra-large split bearings allow easier replacement, reducing maintenance time and costs.
  • Continuous Casting Machines: SWRTM bearings improve wear resistance and durability, reducing failures and maintenance costs.


Conclusion
NSK's innovative solutions and commitment to quality make it a reliable partner in the steel industry, enhancing operational efficiency and reducing downtime.
Failure Mechanism Identification
Spherical roller bearings in continuous casting machines face challenges like insufficient lubrication, leading to wear and crack progression. Uneven wear and stress concentration are primary failure mechanisms.

Countermeasures and Material Development
SWR™ Bearings, developed with wear-resistant materials and special heat treatment, show improved wear resistance and extended bearing life, reducing maintenance costs.

Roller Bearings for Rolling Mills
Four-row tapered and cylindrical roller bearings are used in rolling mills under harsh conditions. New designs like Extra-Capacity Sealed-Clean™ and Water-TF™ Bearings offer higher reliability and longer life.

Benefits and Cost Reduction
Advanced bearings like SWR™ and Water-TF™ extend replacement cycles and reduce accidents, lowering maintenance costs by 20%-30% due to longer bearing life and reduced grease consumption.

Conclusion
Advanced bearing materials and designs significantly improve performance and maintenance efficiency in the steel industry, especially in continuous casting and rolling mill applications.
Overview: The document provides technical specifications for NSK's Extra-Capacity Sealed-Clean™ Four-Row Tapered Roller Bearings (KVS Series) and Super-TF™ Four-Row Cylindrical Roller Bearings (STF-RV Series) used in rolling mills.

Specifications: Lists bearing numbers with dimensions in millimeters and inches, load ratings in kilonewtons (kN), and axial load factors. Bearings are made of NSK Super-TF material.

Load Calculations: Static equivalent load is calculated with P0 = Fr + Y0Fa, and dynamic equivalent load with P = XFr + YFa, with different X and Y values based on Fa/Fr ratio.

Tables and Data: Includes tables with dimensions and load ratings for each bearing type, providing key parameters like diameter and load ratings.

Remarks: Bearings marked with an asterisk are inch design, and additional specifications like oil mist fitting are available upon request.

Contact Information: Provides contact details for NSK sales offices in various countries.
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Catalog excerpts

Bearings for the Steel Industry-1

MOTION & CONTROL™ STEEL INDUSTRY

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Bearings for the Steel Industry-2

As one of the world's leading manufacturers of rolling bearings, linear technology components and steering systems, we can be found on almost every continent - with production facilities, sales offices and technology centres - because our customers appreciate short decision-making channels, prompt deliveries and local service. NSK commenced operations as the first Japanese manufacturer of rolling bearings back in 1916. Ever since, we have been continuously expanding and improving not only our product portfolio but also our range of services for various industrial sectors. In this context, we...

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Bearings for the Steel Industry-3

Partnership based on trust – and trust based on quality Total Quality by NSK: The synergies of our global network of NSK Technology Centres. Just one example of how we meet our requirements for high quality. NSK is one of the leading companies with a long tradition in patent applications for machine parts. In our worldwide research centres, we not only concentrate on the development of new technologies, but also on the continual improvement of quality based on the integrated technology platform of tribology, material technology, analysis and mechatronics. More about NSK at www.nskeurope.com or...

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Bearings for the Steel Industry-4

Robust, wear-resistant and durable – NSK´s rolling bearings for the iron and steel industry It´s a tough life in the iron and steel industry: variations in temperature, high levels of contamination, belt speeds of more than 2000 metres a minute, rocking motions and impacts. NSK rolling bearings take all of this in their stride; from the preparation of the raw material, through the smelting process, right up to the final rolled product. We offer bearings that have been specially developed for all the relevant conditions encountered throughout the entire process. That´s why, for example, we have...

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Bearings for the Steel Industry-5

The best combination for new developments: research and practical experience NSK rolling bearings for the iron and steel industry are the result of intense research and development, as well as a close working relationship with our clients. As a result of the demands of practical experience, we conduct a continuous improvement programme for our products, with as much regard to construction as materials and lubrication. In order to guarantee the highest standards of quality and reliability under the harshest of conditions, all NSK products undergo the most stringent testing on our test rigs development...

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Bearings for the Steel Industry-6

A Sintering Machines B Conveyors crude (up from page 10) A Sintering Machines NSK products for the entire iron and steel industry process Rolling bearings for iron and steel mills have to withstand varied and extreme operating conditions, amongst which high temperatures, high or low rotational speeds, as well as environments that are contaminated with water or dirt. We offer a whole range of products for all mill processes; products that deliver reliable and continuous operation under all conditions. Sealed-Clean™ Bearings for Sintering Machine Pallets B Conveyors Spherical Roller Bearings Plummer...

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Bearings for the Steel Industry-7

Hot strip mills (roughing stand) C BOFs and converters HOT D Cranes E Continuous casting machines (up from page 12) C BOFs and converters Ultra-Large Split Bearings for BOFs and Converter Trunnions E Continuous casting machines Tapered Roller Bearings with Aligning Rings Cylindrical Roller Bearings with Aligning Rings D Cranes DIN-Standard Full-Complement Cylindrical Roller Bearings for Crane Sheaves Split Roller Bearing Units for Segmented Rolls SWRTM Bearings 7 F Plate mills Four-Row Cylindrical Roller Bearings for Backup Rolls (with stud-type cages for super heavy loads)

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Bearings for the Steel Industry-8

Table rollers Hot strip mills (finishing stand) Cold rolling mills Plate mills Rolling mills for steel pipes Rolling mills for steel bars and wire rods Rolling mills for sections Table rollers Molded-OiP Bearings Sealed-Clean™ Spherical Roller Bearings Plummer Blocks Rolling mills for steel pipes, steel bars, wire rods and sections Four-Row Cylindrical Four-Row Tapered Horizontal Rolls Four-Row Tapered Vertical Rolls Four-Row Cylindrical Four-Row Tapered Roller Bearings Tapered Roller Bearings Cylindrical Roller Bearings

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Bearings for the Steel Industry-9

L Skin pass mills N Tension levellers K Multi-roll rolling cluster mills M Chain conveyors (up from page 22) J Cold rolling mills K Multi-roll rolling cluster mills Four-Row Cylindrical Roller Bearings and Four-Row Tapered Roller Bearings for Roll Necks Backing Bearings for Backup Rolls M Chain conveyors S-Type SealedClean™ Bearings for Chain Conveyors WTF™ Bearings L Skin pass mills N Tension levellers Extra-Capacity SealedClean™ Four-Row Tapered Roller Bearings Extra-Capacity Sealed-Clean™ FourRow Tapered Roller Bearings Double-Row Tapered Roller Bearings for Axial Loads Bearing Units for Tension...

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Bearings for the Steel Industry-10

Bearings for Sintering Equipment Sealed-Clean Bearings for Pallet Wheels Sealed-Clean Bearings for Inboard Rollers > Scale (sintered particles) Premature failure of bearings for pallet wheels and bearings for inboard rollers (plain bearings) Entry of sintered particles Thermal degradation of grease Poor lubrication > Premature wear and flaking High bearing usage cost Unexpected failure Sintering equipment Conventional Structure Wheel Inboard roller Contamination around the equipment, high maintenance costs Freguent greasing High operational cost Leakage of the grease into the eguipment, high...

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Bearings for the Steel Industry-11

Design measures Sealed-Clean Bearings for Pallet Wheels - > Optimum crowning of the roller raceway surface enabling resistance to unbalanced load > High sealing performance (featuring a special contact seal) > Packing of grease with excellent heat and pressure resistance > Easier handling (one-piece design with fastening ring adopted for the inner ring) Sealed-Clean Bearings for Inboard Rollers - > Higher load capacity (by outer ring thickness design with high strength and full-complement roller type) > Improvement of axial load capacity > High sealing performance (featuring a special contact...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.