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What is the Large Cylindrical Roller Bearing?

A Large Cylindrical Roller Bearing (CRB) is a heavy-duty mechanical component using cylindrical rollers instead of balls to support immense radial loads, offering high rigidity, speed capability, and a large contact area for industrial applications like rolling mills, gearboxes, and heavy machinery, with designs allowing for axial movement or handling one-directional axial loads. 

1.Features of Large Cylindrical Roller Bearing

Large Cylindrical Roller Bearings stand out in heavy industrial applications due to their targeted large-size optimization and outstanding performance advantages, with core features as follows:

Ultra-High Radial Load Capacity：Adopting large-size rollers and line-contact design, the bearing distributes radial loads evenly across each roller, avoiding local stress concentration. Its maximum radial dynamic load rating reaches up to 8000 kN, which is 2-3 times higher than that of conventional-sized cylindrical roller bearings, perfectly adapting to the ultra-heavy-load requirements of large equipment such as rolling mill work rolls and mining crushers.

Full Coverage of Large Sizes：The standard product line covers a wide size range: inner diameter 90–1400 mm, outer diameter 140–1900 mm, and width 70–1360 mm. It also supports non-standard ultra-large size customization, fully meeting the large-span and high-load installation needs of large-scale machinery, and can directly replace imported large-size bearing series.

Convenient Installation & Maintenance：Many models feature a separable inner/outer ring structure, allowing independent mounting and disassembly of components. This eliminates the need to disassemble the entire host equipment during bearing replacement, reducing maintenance difficulty and downtime for large-size machinery by over 40%, significantly lowering maintenance costs.

High Rigidity & Deformation Resistance：The inner and outer rings adopt thick-wall reinforcement technology, and the bearing rings and rollers are made of high-strength materials with surface hardening treatment. Compared with conventional bearings, its deformation resistance is increased by 40%, ensuring stable operational accuracy even under ultra-heavy loads and large-size working conditions.

Long Service Life & Reliable Performance:Bearing rings and rollers are primarily made of GCr15 high-carbon chromium steel, with SUS440C stainless steel available for corrosive environments. The roller end faces undergo precision polishing (surface roughness Ra≤0.08μm), and the optimized raceway design reduces friction and wear. Compared with conventional large-size bearings, its fatigue life is increased by 30%, adapting to long-term continuous operation of large equipment.

Flexible Customization Capabilities:Supports multi-dimensional non-standard customization: non-standard large-size adjustment (inner diameter/outer diameter/width), corrosion-resistant material modification (SUS440C), separable/integral structure selection, high/low temperature special lubrication solutions, seal type upgrade (composite seal), and cage material customization (heavy-load dedicated), fully meeting the personalized needs of different industrial scenarios.

2. Applications of Large Cylindrical Roller Bearing

Leveraging its ultra-heavy-load capacity, large-size adaptability, and high rigidity, Large Cylindrical Roller Bearings are widely used in 10 key industrial fields, becoming an indispensable core component in large-scale heavy machinery:

Steel & Metallurgical Industry:Applied to rolling mill work rolls, backup rolls, continuous casting machines, and straightening equipment, the bearing withstands extreme radial loads, high-frequency shock, and high-temperature environments during steel production, ensuring precise control of metal workpiece dimensions.

Mining & Quarry Equipment:Installed in crushers, grinding mills, and large conveyors, it operates reliably under extreme loads, severe vibration, and dusty environments, adapting to the continuous heavy-load operation requirements of mining and quarrying operations.

Wind Energy Equipment:Integrated into wind turbine gearboxes and generator main shafts, the bearing supports heavy radial forces generated by rotor weight and wind loads, with high reliability and long service life to meet the 20-year design life requirements of onshore and offshore wind farms.

Power Generation Equipment:Used in hydropower turbines and thermal power plant auxiliary rotating machinery, it supports large shafts under continuous load, ensuring stable operation of power generation equipment and reducing maintenance shutdown risks.

Marine & Offshore Machinery：Applied to ship propulsion systems, deck winches, and offshore platform thrusters, the corrosion-resistant customized version adapts to humid and salt-spray marine environments, delivering reliable performance under heavy loads and harsh conditions.

Heavy Industrial Gearboxes：Integrated into large industrial gear reducers and planetary gear systems, it handles high radial loads generated by gear meshing forces, maintaining stable transmission performance and reducing vibration and noise in the drive system.

Cement Industry：Used in rotary kilns, jaw crushers, and ball mills, the bearing operates continuously under heavy loads and dusty conditions, with low maintenance requirements and high operational reliability to meet the long-term continuous production needs of cement plants.

Paper & Pulp Machinery：Supports large paper machine rolls, press sections, and dryer cylinders, its high rigidity and stable load-bearing capacity ensure uniform pressure between rolls, maintaining consistent product quality in continuous paper production.

Construction & Earthmoving Equipment：Installed in large excavators, crawler cranes, and track rollers, it is suitable for low-to-moderate speed, high-load construction scenarios, withstanding heavy radial loads and shock loads during lifting and excavation operations.

General Heavy Rotating Machinery：Widely used in large motors, generators, industrial fans, and blowers, the bearing provides stable shaft support for large rotating components, ensuring efficient and reliable operation of heavy machinery in long-term continuous working conditions.

3.Price of Large Cylindrical Roller Bearing

The price of Large Cylindrical Roller Bearings is determined by multiple interrelated factors, with core influencing elements as follows:

Size & Load Rating：Size is the primary pricing driver. Larger bearings consume more high-quality bearing steel and require more complex precision machining, heat treatment, and grinding processes, leading to significantly higher costs. For example, bearings with an inner diameter exceeding 1000 mm or a radial load rating above 5000 kN are 2-3 times more expensive than medium-sized models of the same precision.

Precision Grade：Precision grades follow the international standard hierarchy: P0 < P6 < P5 < P4. High-precision P4/P5 grade large bearings require stricter multi-stage grinding, 100% dimensional testing, and precision sorting, with a higher production rejection rate. Their prices are 40%-70% higher than standard P0 grade bearings.

Material Selection Standard：GCr15 high-carbon chromium steel is the most cost-effective option; upgrading to SUS440C stainless steel for corrosion resistance increases raw material costs by 50%-80%. Special high-temperature resistant alloy materials further raise the price by 30%-50% compared to standard materials. Cage material also affects pricing: brass cages are more expensive than reinforced Nylon 66 or stamped steel cages.

Structural Design：Seal & Lubrication ConfiguratioSeal & Lubrication Configuratioe bearings cost 15%-20% more than integral structure models due to higher machining precision requirements for split surfaces. Full-complement designs for ultra-heavy loads are pricier than cage-type bearings due to more rollers and specialized raceway processing.

Seal & Lubrication Configuratio：Open-type bearings are the base economical option; adding contact rubber seals or non-contact labyrinth seals increases costs by 15%-30%. Special lubrication solutions, such as high-temperature grease (adapting to ≤150°C) or corrosion-resistant grease, also raise the overall product price.

Order Quantity & Delivery Time :Bulk orders (≥50 pieces) qualify for a 15%-25% quantity discount, as mass production reduces unit processing costs and material waste. Small-batch orders (≤20 pieces) or urgent orders (delivery within 10 days) incur additional production scheduling, expedited processing, and logistics costs, increasing the unit price by 20%-40%.

4. How to choose the Large Cylindrical Roller Bearing

To select the optimal Large Cylindrical Roller Bearing and ensure long-term stable operation matching large-scale equipment requirements, purchasers should comprehensively evaluate the following key factors:

Working Condition Matching：First, clarify core working parameters: radial load (static/dynamic), operating speed (suitable for low-to-medium speed ≤3000 rpm), working temperature (-40°C to +150°C for standard models), and environmental conditions (clean, dusty, corrosive, high-temperature). Note that the bearing is mainly designed for radial loads and can bear a small amount of bidirectional axial load (≤10% of radial load); if combined radial and axial loads need to be borne, it must be used in combination with thrust bearings.

Size & Precision Confirmation:Determine the bearing’s boundary dimensions (inner diameter d, outer diameter D, width B) strictly according to the equipment design drawings to ensure installation compatibility. Select the precision grade based on application requirements: P0/P6 grade for general heavy machinery such as conveyors, and P5/P4 high-precision grade for key equipment such as rolling mill work rolls to ensure operational accuracy.

Material & Structure Selection:For standard room temperature and clean working conditions, GCr15 high-carbon chromium steel and integral structure models are cost-effective choices. For corrosive environments, select SUS440C stainless steel material; for large equipment requiring convenient maintenance, choose separable structure models. Match cage material to working conditions: brass cages for heavy-load and impact scenarios, and reinforced Nylon 66 cages for medium-speed operation.

Load & Speed Capacity:Verification Calculate the actual static and dynamic radial loads of the equipment, and select bearings with basic load ratings 1.2–1.5 times higher than the actual working loads to reserve a safety margin for shock loads. Verify that the bearing’s limiting speed (grease/oil lubrication) matches the equipment’s maximum operating speed, avoiding overspeed operation that may cause overheating and premature failure.

Supplier Qualification:Assessment Prioritize professional suppliers with mature large-size bearing production capabilities, such as NewBee Transmission. Verify the supplier’s ISO9001 quality certification, advanced production equipment (CNC precision grinders, large-scale integral heat treatment lines), and complete product testing reports. Evaluate after-sales service capabilities, including warranty periods, on-site installation guidance, and technical support for large-size equipment.

Cost-Effectiveness Balance:Avoid blind pursuit of ultra-high specifications that exceed actual needs. For non-critical large machinery, select standard materials and precision grades to control costs; for core equipment such as key rolling mills, prioritize product reliability and performance, and reasonably select customized solutions (e.g., corrosion-resistant materials, separable structure) to ensure long-term stable operation.

5. Manufacturer of Large Cylindrical Roller Bearing

NewBee Transmission is a professional manufacturer and supplier of high-quality Large Cylindrical Roller Bearings, focusing on providing reliable heavy-load bearing solutions for global customers in steel, metallurgy, mining, wind energy, construction machinery, and marine industries. With advanced large-size bearing manufacturing technology, strict full-process quality control, and customer-centric services, NewBee Transmission has become a trusted long-term partner for many large industrial enterprises worldwide.

Comprehensive Product Range :The standard Large Cylindrical Roller Bearing product line covers inner diameter 90–1400 mm, outer diameter 140–1900 mm, and width 70–1360 mm, with precision grades including P0, P6, P5, and P4. It offers cage-type and full-complement variants, separable and integral structure designs, and material options of GCr15 high-carbon chromium steel and SUS440C stainless steel. The company also provides non-standard ultra-large size customization services for special working conditions, fully meeting diverse application needs.

Advanced Production & Testing Capabilities:Equipped with internationally advanced large-size CNC precision grinding machines, integral automatic heat treatment lines, high-precision roller sorting equipment, and a professional large-bearing testing center, the company implements strict 100% inspection throughout the production process. From raw material spectral analysis and metallographic testing to finished product load capacity, precision, and wear resistance testing, every batch of large-size bearings undergoes comprehensive quality verification to ensure consistency and reliability.

Professional Customization Services:The company’s R&D team consists of senior engineers with over 15 years of experience in large-size bearing design and manufacturing, providing one-stop customized solutions according to customers’ specific working conditions and equipment requirements. Whether it is non-standard large-size design, high-temperature/corrosion-resistant material modification, structural optimization, or special lubrication and seal solutions, the team can efficiently complete design, sample development, and mass production. The sample development cycle for customized models is 8–16 weeks, with urgent production support for key projects in metallurgy and mining industries.

Reliable Quality Assurance & After-Sales Service:All products strictly comply with ISO9001 quality management system standards and international bearing industry standards (ISO 3016), with a standard product warranty period of 12 months. The company has a complete after-sales service system, providing 24/7 online technical consultation, on-site installation guidance for large-size equipment, and professional maintenance training. For quality problems caused by product defects, the company implements free replacement and maintenance services to ensure uninterrupted customer production.

Efficient Logistics & Global Supply Chain:Relying on intelligent warehousing management and an optimized global supply chain, NewBee Transmission ensures a delivery cycle of 10–20 days for standard in-stock models. The company cooperates with international logistics partners specializing in large-size equipment transportation, and has established overseas warehouses in key regions, achieving fast and efficient delivery to customers worldwide, fully supporting customers’ just-in-time production plans.

6.Precautions for Large Cylindrical Roller Bearing

Proper installation, lubrication, and maintenance are critical to maximizing the service life and performance of Large Cylindrical Roller Bearings, especially in ultra-heavy-load and large-size working conditions. Key precautions are as follows:

Standardized Installation Operation Before installation, thoroughly clean the bearing, shaft, and housing bore to remove burrs, oil stains, welding slag, and other impurities, avoiding raceway and roller wear caused by foreign matter. Use specialized hoisting and pressing tools for assembly, applying force evenly on the ring with interference fit (usually the inner ring). Strictly prohibit hammering or impact knocking, which will cause raceway deformation, roller damage, and permanent precision loss. For separable structure bearings, install the inner ring first and then the outer ring to ensure accurate positioning.

Scientific Lubrication Management:Select lubricants based on working temperature, speed, and load conditions: use heavy-duty lithium-based grease for standard conditions; use high-temperature special grease for high-temperature environments (≤150°C); use corrosion-resistant grease for corrosive environments. Open-type bearings require regular lubrication replenishment, with grease replacement every 800–1500 working hours; sealed bearings should be inspected regularly for grease leakage, and seals and grease should be replaced promptly if leakage is found. Avoid over-lubrication (which increases friction and heat generation) or insufficient lubrication (which causes dry friction and premature wear).

Real-Time Operation Monitoring:During equipment operation, continuously monitor the bearing’s temperature, vibration, and noise. The normal operating temperature of the bearing ranges from 30°C to 80°C, with a temperature rise not exceeding 20°C. If the temperature rises sharply, or abnormal vibration or noise occurs, it may indicate insufficient lubrication, installation misalignment, or overload. Shut down the equipment immediately for inspection and troubleshooting to prevent catastrophic equipment damage.

Proper Storage & Handling Store:large-size bearings in a clean, dry, and ventilated environment with relative humidity ≤60%, avoiding direct contact with acids, alkalis, and other corrosive substances to prevent rust and corrosion. Bearings should be stored horizontally on dedicated supports, and heavy stacking is strictly prohibited to prevent deformation of the inner and outer rings. During transportation and handling, use specialized shockproof packaging and hoisting equipment to avoid collision, dropping, or severe vibration, which may damage the internal structure and precision of the bearing.

Regular Inspection & Maintenance:Conduct regular disassembly inspections according to the equipment’s operating cycle and working conditions. Check the wear condition of raceways and rollers, the integrity of the bearing structure, the sealing effect, and the quality of residual lubricant during inspection. If abnormal wear, pitting, deformation, or damage is found, replace the bearing in a timely manner to avoid secondary damage to the host equipment. After inspection and maintenance, thoroughly clean the bearing and related parts, reapply qualified lubricant, and reinstall correctly according to assembly specifications.

Technical Specifications of Large Cylindrical Roller Bearing

For technical specifications, pricing, or custom engineering solutions:

Email: paul@newbeetrans.com

Website: www.newbeetrans.com