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What is a Single Row Cylindrical Roller Bearing?

A Single Row Cylindrical Roller Bearing is a type of radial bearing using cylindrical rollers for high-capacity radial loads, featuring a single row of rollers between inner and outer rings, often with flanges for some axial guidance, designed for high rigidity, efficiency, and speed in heavy industrial applications like gearboxes and machinery. They are separable (inner and outer rings can mount independently) and come in cage or full-complement designs, with the latter housing more rollers for even heavier loads at lower speeds. 

Features of Single Row Cylindrical Roller Bearing

Single Row Cylindrical Roller Bearings stand out in industrial applications due to their unique structural design and outstanding performance advantages, with core features as follows:

Exceptional Radial Load-Bearing Capacity: The line-contact design between rollers and raceways maximizes the effective contact area, enabling the bearing to withstand radial loads 2-3 times higher than deep groove ball bearings of the same size. With a maximum radial load capacity of up to 3000 kN, it excels in heavy-load and ultra-heavy-load scenarios such as rolling mills and crushers. The full-complement variant, with more rollers packed in the raceway, further enhances load-bearing capacity for low-speed, high-load applications.

Separable Structure for Easy Installation & Maintenance: The inner and outer rings can be separated, allowing independent mounting and disassembly. This eliminates the need to disassemble the entire host equipment when replacing bearings, reducing assembly difficulty and maintenance time by over 50%. It is particularly suitable for machinery where integral disassembly is impractical, such as large motor rotors and machine tool spindles.

High Rigidity & Precision: Available in precision classes ranging from P0 to P4, the P4-class ultra-precision variant achieves micron-level rotational accuracy. The raceways and rollers undergo precision grinding (surface roughness Ra≤0.05μm), ensuring strong deformation resistance under heavy loads. This high rigidity maintains equipment operational accuracy, minimizing machining or transmission errors in precision machinery.

Medium-High Speed Adaptability: The optimized cage design (available in brass, Nylon 66, or stamped steel) reduces centrifugal force impact at high speeds, minimizing friction and collision between rollers. With grease lubrication, the maximum operating speed reaches up to 4500 r/min, and with oil lubrication, it can reach 6000 r/min, meeting the speed requirements of motors, centrifugal pumps, and other medium-high speed equipment.

Durable & Stable Performance: Bearing rings and rollers are primarily made of GCr15 high-carbon chromium steel, with SUS440C stainless steel available for corrosive environments. Surface hardening treatment and optimized roller end-face design enhance wear resistance and fatigue life, extending service life by 30% compared to conventional bearings. This ensures reliable operation in long-term continuous working conditions.

Wide Customization Options: Supports non-standard customization, including size (inner diameter, outer diameter, width), material (corrosion-resistant, high-temperature resistant), structure (separable or integral rings), seal type, and special lubrication solutions for extreme temperatures. This adaptability allows it to meet the unique requirements of diverse industrial environments.

Applications of Single Row Cylindrical Roller Bearing

Leveraging its high radial load capacity, rigidity, and adaptability, Single Row Cylindrical Roller Bearings are widely used across 10 key industrial fields, becoming indispensable components in critical machinery:

Electric Motors & Generators: Applied to industrial motors, traction motors, and large generators, it supports heavy rotor loads while ensuring high-speed rotational stability, guaranteeing consistent power output and long-term reliability.

Gearboxes & Speed Reducers: Integrated into industrial gearboxes, wind turbine gear units, and conveyor drive systems, it withstands large gear transmission forces and maintains precise shaft alignment, reducing transmission losses and noise.

Machine Tools: Used in spindles and feed mechanisms of lathes, milling machines, and grinders, its high radial stiffness ensures machining accuracy, critical for precision cutting and forming operations.

Pumps & Compressors: Suitable for centrifugal pumps, screw compressors, and turbo compressors, it maintains shaft stability under continuous radial loads from fluid or gas pressure, ensuring efficient fluid transfer.

Steel & Metallurgical Machinery: A core component in rolling mills, continuous casting machines, and steel processing lines, it withstands extreme radial loads and shock loads during steel production, adapting to high-temperature and dusty environments.

Wind Energy Equipment: Installed in wind turbine gearboxes and generator shafts, it endures heavy loads and vibration from wind conditions, supporting long service life in offshore and onshore wind farms.

Construction & Mining Equipment: Used in crushers, conveyors, and excavators, it provides robust performance in harsh, dusty environments with fluctuating heavy loads, reducing maintenance downtime.

Paper, Printing & Textile Machinery: Supports long rollers in paper machines, printing press cylinders, and textile processing equipment, ensuring smooth rotation and uniform pressure for consistent product quality.

Railway & Transportation: Equipped in traction motors and axle gear units of trains, it delivers high reliability under heavy loads and vibration during long-distance operation.

Industrial Fans & Blowers: Used in large ventilation fans and industrial blowers, it maintains stable rotation under continuous radial loads, ensuring efficient air circulation in factories and infrastructure.

Factors Affecting the Price of Single Row Cylindrical Roller Bearing

The price of Single Row Cylindrical Roller Bearings is determined by multiple interrelated factors, primarily including product specifications, material quality, and order requirements:

Size & Load Rating: Size is a key price driver—inner diameter ranges from 120–1320 mm, outer diameter 180–1600 mm, and width 28–345 mm. Larger bearings consume more raw materials and require more complex precision machining, increasing costs. Bearings with ultra-high load ratings (above 2000 kN) also command higher prices due to thicker raceways and reinforced structures.

Precision Grade: Precision grades (P0 < P6 < P5 < P4) directly impact pricing. High-precision P4/P5 bearings require stricter grinding, testing, and sorting processes, with higher production rejection rates, leading to prices 40%-60% higher than standard P0 grade bearings.

Material Selection: Standard GCr15 high-carbon chromium steel is cost-effective; SUS440C stainless steel (for corrosion resistance) increases raw material costs by 50%-80%. Cage material also affects pricing—brass cages are more expensive than Nylon 66 or stamped steel options.

Structural Design: Full-complement bearings (for heavy loads) are pricier than cage-type bearings due to more rollers and specialized raceway design. Separable structure bearings cost slightly more than integral designs due to higher machining precision requirements.

Seal & Lubrication Configuration: Open-type bearings are the most economical; adding contact seals (2RS) or non-contact labyrinth seals increases costs by 15%-30%. Special lubrication solutions (e.g., high-temperature grease) also raise the overall price.

Order Quantity & Delivery Time: Bulk orders (≥100 pieces) qualify for 15%-25% quantity discounts. Small-batch (≤30 pieces) or urgent orders (delivery within 7 days) incur additional production and logistics costs, increasing unit prices by 20%-35%.

What Factors Should Be Considered When Purchasing Single Row Cylindrical Roller Bearing

To select the optimal Single Row Cylindrical Roller Bearing and ensure compatibility with equipment, purchasers should comprehensively evaluate the following key factors:

Working Condition Matching: Clarify core parameters such as radial load (static/dynamic), rotational speed, working temperature (-40°C to +150°C), and environmental conditions (clean, corrosive, dusty). For example, high-temperature environments require GCr15 material with high-temperature grease, while corrosive settings need SUS440C stainless steel and sealed structures.

Size & Precision Confirmation: Determine inner diameter (d), outer diameter (D), and width (B) based on equipment design drawings. Select precision grade according to application—P0/P6 for general machinery, P5/P4 for precision equipment like machine tool spindles.

Material & Cage Selection: Choose GCr15 for standard conditions, SUS440C for corrosion resistance. Match cage material to speed and load: Nylon 66 for high-speed operation, brass for heavy loads, and stamped steel for cost-sensitive applications.

Load & Speed Capacity Verification: Ensure the bearing’s dynamic load rating (Cr) and static load rating (Cor) exceed actual working loads by 1.2–1.5 times to withstand shock loads. Verify that the limiting speed (grease/oil lubrication) matches the equipment’s maximum rotational speed.

Supplier Qualification Assessment: Prioritize suppliers with professional production capabilities, such as NewBee Transmission, verifying ISO9001 quality certification, advanced production equipment (CNC precision grinders), and comprehensive testing reports. Evaluate after-sales support, including warranty periods and technical consultation.

Cost-Effectiveness Balance: Avoid over-specifying—select standard materials and precision grades for non-critical equipment to reduce costs. Domestic brands like NewBee Transmission offer performance comparable to imported brands (e.g., SKF, INA) at 20%-30% lower prices, ensuring stable supply and cost savings.

Supplier of Single Row Cylindrical Roller Bearing

NewBee Transmission is a professional supplier of high-quality Single Row Cylindrical Roller Bearings, specializing in providing reliable bearing solutions for global customers in steel, metallurgy, mining, motor, and wind energy industries. With advanced manufacturing capabilities and customer-centric services, it has established a reputation as a trusted partner for industrial enterprises worldwide.

Comprehensive Product Range: The standard product line covers inner diameters 120–1320 mm, outer diameters 180–1600 mm, and widths 28–345 mm, with precision grades P0, P6, P5, P4. It offers cage-type and full-complement variants, open-type and sealed designs, meeting diverse application needs. Customized solutions are available for non-standard sizes and special environments.

Advanced Production & Testing Capabilities: Equipped with international advanced CNC precision grinding machines, integral heat treatment lines, and automatic roller sorting equipment, NewBee implements strict quality control throughout the production process. From raw material spectral analysis to finished product load and precision testing, 100% inspection ensures product consistency and reliability.

Professional Customization Services: A team of senior engineers with over 15 years of experience provides one-stop customization, including non-standard size design, corrosion-resistant/high-temperature material modification, and special seal/lubrication solutions. The sample development cycle is only 4–8 weeks, with urgent production support for critical projects.

Reliable Quality Assurance & After-Sales: All products comply with ISO9001 and international bearing standards, backed by a 12-month warranty. The 24/7 technical support team offers on-site installation guidance, maintenance training, and rapid response to quality inquiries, ensuring uninterrupted customer production.

Efficient Logistics & Supply Chain: Standard models have a delivery cycle of 5–12 days, with an intelligent warehousing center ensuring quick order fulfillment. Cooperating with global logistics partners (DHL, FedEx) and overseas warehouses, NewBee provides timely delivery to customers worldwide, supporting just-in-time production schedules.

Precautions for Using Single Row Cylindrical Roller Bearing

Proper installation, lubrication, and maintenance are critical to maximizing the service life and performance of Single Row Cylindrical Roller Bearings. Key precautions include:

Standardized Installation: Thoroughly clean the bearing, shaft, and housing bore to remove burrs, oil stains, and impurities. Use specialized pressing tools for assembly, applying force evenly on the separable ring (inner or outer) to avoid raceway deformation or roller damage. Ensure correct interference fit (shaft h7/housing bore H8) and adjust bearing clearance to design specifications; avoid hammering or rough handling.

Scientific Lubrication Management: Select lubricants based on temperature, speed, and load—high-temperature environments (≤150°C) use high-temperature grease, while high-speed applications use low-viscosity lubricating oil. Open-type bearings require grease replacement every 1000–2000 working hours; sealed bearings should be inspected regularly for leakage, with timely seal replacement and grease replenishment. Avoid over-lubrication (causes overheating) or insufficient lubrication (leads to dry friction).

Real-Time Operation Monitoring: Monitor bearing temperature, vibration, and noise during operation. Normal operating temperature ranges from 30–80°C, with temperature rise not exceeding 18°C. Abnormal temperature spikes, vibration, or noise may indicate misalignment, overload, or lubrication failure—shut down equipment immediately for inspection to prevent catastrophic damage.

Proper Storage & Handling: Store bearings in a clean, dry, ventilated environment with humidity ≤60%, avoiding contact with corrosive substances. Store horizontally to prevent ring deformation and avoid stacking heavy objects. Use shockproof packaging during transportation to protect against collision, vibration, or dropping, preserving precision.

Regular Inspection & Maintenance: Conduct periodic disassembly inspections based on equipment operating cycles. Check for raceway/roller wear, cage integrity, and seal condition. Replace worn or damaged bearings promptly to avoid secondary equipment failure. After disassembly, clean bearings thoroughly, reapply lubricant, and reinstall correctly.

Technical Specifications of Single Row Cylindrical Roller Bearing

For technical specifications, pricing, or custom engineering solutions:

Email: paul@newbeetrans.com

Website: www.newbeetrans.com