What is a High-Speed Wire Rod Mill Bearing?

A High-Speed Wire Rod Mill Bearing is a specialized, high-performance rolling mill bearing designed for the harsh operating conditions of high-speed wire rod production lines. It adopts a multi-row cylindrical roller with an integrated groove structure, paired with a riveted reinforced cage, to achieve even load distribution and resist centrifugal deformation at high speeds. This bearing can efficiently withstand radial loads, axial loads, and instantaneous impact overloads, while maintaining low friction and stable operation even in high-temperature, high-speed, and heavy-load environments. It is a core component of drive systems in high-speed wire rod mills, directly affecting the production efficiency, product quality, and equipment service life of the entire rolling line. As a professional rolling mill bearing manufacturer, NEWBEE Transmission's High-Speed Wire Rod Mill Bearings, relying on advanced material selection and precision machining processes, have a mean time between failures (MTBF) of ≥50,000 hours and a failure rate of <0.1%, fully meeting the 24/7 continuous operation requirements of modern high-speed wire rod mills. Compared with imported brands such as FAG/INA, their products offer a 40% lower cost and 30% shorter lead time, making them a cost-effective choice in the rolling mill bearing field.

Features of High-Speed Wire Rod Mill Bearings

Ultra-High Reliability for Continuous Operation: The bearing is constructed with high-quality materials and optimized structural design, undergoing rigorous testing with a service life of over 100,000 hours under normal working conditions (load ≤ rated value and compliant lubrication). It supports 24/7 uninterrupted operation, with a failure rate of less than 0.1%, effectively reducing equipment downtime and maintenance costs for high-speed wire rod production lines.

Exceptional Impact Resistance and Load-Bearing Capacity: Adopting a multi-row roller design, the bearing enables even load distribution, minimizing local stress concentration. The chamfered roller ends further reduce edge stress, allowing it to withstand 300% instantaneous overload. This makes it highly adaptable to the frequent load fluctuations and impact forces encountered during the wire rod rolling process.

Extended Lifespan with Advanced Material Treatment: The rings and rolling elements of the bearing are made of GCr15SiMn (with a hardness of HRC 62-64) or carburized steel (with a 2-3mm hardened layer). The carburizing treatment (resulting in a hardness of HRC 60-62) extends the bearing's lifespan by 50% compared to ordinary bearings. Additionally, the optimized regreasing interval can be extended up to 3,000 hours, reducing maintenance frequency.

Low Friction and High-Speed Stability: Through the optimization of roller geometry, the friction coefficient of the bearing is reduced by 20%, which not only lowers energy consumption but also minimizes heat generation during high-speed operation. The riveted reinforced cage structure effectively resists centrifugal deformation at high speeds, ensuring smooth rotation even when the maximum rotational speed reaches the design limit, maintaining stable performance of the rolling mill drive system.

Diverse Sealing and Lubrication Adaptability: The bearing offers two sealing options to meet different working conditions: an open type suitable for forced oil lubrication systems and a labyrinth seal with IP65 protection level, which can effectively prevent the intrusion of dust, iron filings, and cooling water, ensuring the cleanliness of the bearing interior. In terms of lubrication, it is compatible with high-temperature greases such as Shell Gadus S2 and long-life greases such as Kluber Isoflex NBU 15, and supports centralized lubrication systems for high-speed scenarios.

Cost-Efficiency and Short Delivery Cycles: Compared with well-known imported brands like FAG/INA, NEWBEE Transmission's High-Speed Wire Rod Mill Bearings are 40% more cost-effective, significantly reducing the procurement costs of enterprises. In terms of delivery, standard models can be delivered within 7-15 days, and customized products take only 3-6 weeks, which is 30% shorter than the lead time of imported products, helping enterprises shorten the equipment maintenance and replacement cycle.

Technical Specifications of High-Speed Wire Rod Mill Bearings

Basic Parameters

Materials:

Rings & Rolling Elements: GCr15SiMn (HRC 62-64) / Carburized steel (2-3mm hardened layer)

Cage: Copper alloy (high-temperature resistance) / PA66 engineering plastic (lightweight & wear-resistant)

Size Range:

Inner Diameter (d): 35mm - 200mm

Outer Diameter (D): 80mm - 360mm

Width (B): 19.213mm - 144mm

Accuracy Classes: P5, P4 (meeting high-precision rotation requirements of rolling mill drive systems)

Sealing Options: Open type (for forced oil lubrication) / Labyrinth seal (IP65 protection level)

Delivery Time: 7-15 days (standard models) / 3-6 weeks (customized models)

Detailed Dimension and Performance Table

Working Principle of High-Speed Wire Rod Mill Bearings

High-Speed Wire Rod Mill Bearings mainly adopt three structural types: Type NNU, Type NN, and Type NN...K, and their working principles are centered around efficient load transmission, impact resistance, and high-speed stability:

Load Distribution Mechanism: The multi-row roller design allows the bearing to distribute the applied radial and axial loads evenly across each roller, significantly reducing the load on a single roller and minimizing the risk of local wear or damage. The integrated ring structure further enhances the bearing's overall rigidity, reducing deformation under heavy loads and ensuring stable operation of the rolling mill.

Centrifugal Force Neutralization: During high-speed rotation, the bearing is subjected to significant centrifugal forces. The axial preload applied to the bearing effectively neutralizes these centrifugal forces, preventing the rollers from being thrown outward and ensuring close contact between the rollers and the raceways. This not only improves the bearing's load-bearing capacity but also reduces vibration and noise during operation.

Impact-Resistant Design: The chamfered ends of the rollers reduce the stress concentration at the edges of the raceways, enabling the bearing to withstand sudden impact overloads (up to 300% of the rated load) that often occur during the wire rod rolling process. This design feature extends the bearing's service life and enhances the reliability of the entire rolling line.

Lubrication System for High-Speed Stability: The bearing is equipped with a centralized lubrication system that uses a high-pressure oil pump to deliver lubricating oil (or grease) to the contact areas between the rollers and raceways. This ensures that a stable lubricating film is formed, reducing friction and wear. For high-temperature environments, high-temperature-resistant lubricants such as Shell Gadus S2 are used, while long-life lubricants such as Kluber Isoflex NBU 15 are selected for scenarios requiring extended maintenance intervals.

Applications of High-Speed Wire Rod Mill Bearings

With its excellent high-speed stability, impact resistance, and reliability, High-Speed Wire Rod Mill Bearings are widely used in various key components of high-speed wire rod production lines and are compatible with mainstream rolling mill models worldwide:

Key Components of High-Speed Wire Rod Mills:

Split-Speed Boxes and Speed-Increase Boxes: These components require bearings to operate at high speeds while transmitting large torques. The High-Speed Wire Rod Mill Bearing's low friction coefficient and high rigidity ensure efficient power transmission and stable operation.

Pinch Rolls and Cone Boxes: Pinch rolls are responsible for guiding and conveying the wire rod, and cone boxes adjust the rolling speed. The bearing's impact resistance and load-bearing capacity enable it to withstand the variable loads and impacts in these applications.

Roll Boxes and Laying Heads: Roll boxes house the rolling rolls, and laying heads coil the finished wire rod. The bearing's high reliability and extended service life reduce the frequency of maintenance, ensuring continuous production.

Drive Systems of Rolling Mills:

Long Shafts and Idler Wheels: Long shafts require bearings with high concentricity and stability to prevent vibration, while idler wheels need bearings that can withstand radial loads for extended periods. The High-Speed Wire Rod Mill Bearing meets these requirements with its high precision and load-bearing capacity.

Reducing/Sizing Mills and Gear Split-Speed Boxes: These components are critical for controlling the wire rod's diameter and speed. The bearing's accurate rotation and stable performance ensure precise control of the rolling process, improving the quality of the finished wire rod.

Compatible Rolling Mill Models: The bearing is fully compatible with mainstream high-speed wire rod mill models globally, including Morgan 5th-generation, SMS 6th-generation, and Danieli high-speed mills. It has been certified by Morgan and SMS groups, with performance comparable to imported brands, making it an ideal replacement for imported bearings.

Email: Tom@newbeetrans.com

Official website: www.newbeetrans.com