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What is the Double Row Deep Groove Ball Bearing?

Double row deep groove ball bearings are robust, versatile components featuring two rows of balls within deep raceway grooves. They provide significantly higher radial and axial load capacity than single-row alternatives, making them ideal for high-load, compact, or short-shaft applications. They are often used in industrial machinery, electric motors, and automotive components.

Features of Double Row Deep Groove Ball Bearing

Double Row Deep Groove Ball Bearings stand out in medium-heavy load and precision applications due to their optimized structural design and outstanding performance advantages, with core features as follows:

Superior Radial Load-Bearing Capacity:The dual-row steel ball configuration maximizes the effective contact area between rolling elements and raceways, achieving a maximum radial dynamic load rating (Cr) of up to 155 kN (for standard series). It excels in handling heavy radial loads and occasional shock loads, outperforming single-row deep groove ball bearings in high-load scenarios.

Moderate Bidirectional Axial Load Capacity:Retaining the deep groove raceway design, it can bear moderate bidirectional axial loads (20%-30% of radial load capacity), eliminating the need for additional thrust bearings in most industrial applications and simplifying the overall mechanical structure.

High-Speed Adaptability & Low Noise:Optimized cage designs (stamped steel, brass, reinforced Nylon 66, phenolic resin) reduce centrifugal force impact and steel ball collision. With grease lubrication, the maximum limiting speed reaches up to 15000 r/min; with oil lubrication, it can reach 20000 r/min. Precision-ground raceways (surface roughness Ra≤0.02μm) ensure operating noise ≤20dB for precision-grade models, meeting low-noise requirements of high-end equipment.

High Precision & Operational Stability:Available in precision grades ranging from P0 to P4, P4-class ultra-precision models achieve micron-level rotational accuracy with radial runout ≤0.001 mm and axial runout ≤0.002 mm. The integral inner/outer ring structure reduces assembly errors, ensuring stable positioning accuracy for precision machinery.

Durable & Corrosion-Resistant Options:Bearing rings and steel balls are primarily made of GCr15 high-carbon chromium steel, with SUS440C/SUS304 stainless steel available for corrosive environments. Surface hardening treatment enhances wear resistance and fatigue life, extending service life by 30% compared to conventional bearings. It maintains reliable operation in dusty, humid, and moderate-temperature environments.

Compact Structure & Easy Installation:Integrating two bearing rows into a single unit, its axial width is far smaller than the combined width of two single-row bearings, maximizing load-bearing density in limited installation space. Standardized ISO dimensions ensure strong interchangeability, allowing direct replacement of mainstream international brand products without modifying equipment installation structures.

Strong Customization Capabilities:Supports multi-dimensional non-standard customization: non-standard size adjustment (inner diameter 10–100 mm, outer diameter 30–215 mm, width 14–73 mm), material modification (corrosion-resistant, high-temperature resistant), cage optimization, seal type upgrades (open, ZZ shielded, 2RS sealed), and special lubrication solutions. It adapts to extreme environments such as high speed, low noise, and corrosion.

Applications of Double Row Deep Groove Ball Bearing

Leveraging its high load capacity, compact design, and stability, Double Row Deep Groove Ball Bearings are widely used in 10 key industrial fields:

Electric Motors & Heavy-Duty Motors:Applied to medium-large industrial motors, drive motors, and precision motors, it provides high load capacity while maintaining smooth rotation, ensuring long-term reliable operation of motor spindles.

Gearboxes & Transmission Systems:Integrated into industrial gear reducers and power transmission units, it withstands radial and bidirectional axial loads generated by gear meshing, improving transmission efficiency and stability.

Pumps & Compressors:Used in industrial pumps, water pumps, and air compressors, it enhances shaft stability and extends service life, adapting to continuous operation under fluid pressure loads.

Agricultural Machinery:Installed in harvesters, tractors, and tillage equipment, it operates reliably under shock loads and dusty environments, supporting continuous agricultural operations.

Construction Equipment:Integrated into concrete mixers, small cranes, and vibrating equipment, it provides robust load support in harsh construction site conditions, withstanding vibration and impact.

Steel & Metallurgical Equipment:Applied to rolling equipment and conveyor drives, it meets high load capacity requirements without increasing shaft size, adapting to high-temperature and dusty metallurgical environments.

Textile Machinery:Used in spinning frames and loom drive systems, it enables stable rotation at medium-high speeds, ensuring consistent textile production quality.

Fans & Blowers:Equipped in large industrial fans and ventilation systems, it provides reliable support for heavy impellers, maintaining stable operation under continuous radial loads.

Conveyors & Material Handling Equipment:Installed in belt conveyors and roller conveyors, it supports combined loads with improved rigidity, ensuring smooth material transportation.

General Industrial Machinery:Widely used in printing machines, packaging equipment, and food processing machinery, it adapts to diverse working conditions with its versatility and reliability.

Price of Double Row Deep Groove Ball Bearing

The price of Double Row Deep Groove Ball Bearings is determined by multiple interrelated factors, with core influences as follows:

Size & Load Rating:Size is a primary pricing driver. Larger bearings (e.g., inner diameter > 80 mm, outer diameter > 160 mm) consume more high-quality steel and require more complex precision machining, leading to higher costs. Bearings with ultra-high load ratings (Cr > 100 kN) command a premium due to reinforced raceway structures.

Precision Grade:Precision grades follow the hierarchy P0 < P6 < P5 < P4. High-precision P4/P5 grade bearings require stricter grinding, multi-round testing, and sorting, with a higher production rejection rate. Their prices are 40%-70% higher than standard P0 grade bearings, mainly for precision equipment such as high-end motors and machine tools.

Material Selection Standard:GCr15 high-carbon chromium steel is cost-effective; upgrading to SUS440C/SUS304 stainless steel for corrosion resistance increases raw material costs by 50%-80%. Cage material also affects pricing: brass cages are 25%-40% more expensive than stamped steel cages, while reinforced Nylon 66 cages are suitable for high-speed, low-noise scenarios at a moderate price premium.

Structural & Seal Configuration:Open-type bearings are the most economical; adding non-contact metal shields (ZZ) increases costs by 15%-25%, while contact sealed (2RS) models (pre-filled with long-life grease) increase costs by 25%-40%. Sealed models reduce maintenance frequency, suitable for dusty or humid environments.

Customization Requirements:Non-standard customizations such as special size dimensions, material modifications, and low-noise optimization increase costs by 20%-50% based on processing complexity. Small-batch non-standard orders incur additional mold and debugging costs, raising the unit price.

Order Quantity & Delivery Time:Bulk orders (≥100 pieces) qualify for a 15%-25% quantity discount. Small-batch orders (≤30 pieces) or urgent orders (delivery within 7 days) incur additional production and logistics costs, increasing the unit price by 20%-35%. Standard models have a delivery cycle of 5-10 days, while customized models require negotiation with the manufacturer.

How to choose the Double Row Deep Groove Ball Bearing

To select the optimal Double Row Deep Groove Ball Bearing and ensure long-term stable operation, purchasers should comprehensively evaluate the following key factors:

Clarify Core Working Condition Parameters:Confirm the radial/axial load ratio(axial load ≤20%-30% of radial load), operating speed, working temperature (-40°C to +150°C for standard models), and environmental conditions (clean, dusty, humid, corrosive). For scenarios with excessive axial load, use it in combination with thrust bearings.

Confirm Size & Installation Tolerances:Strictly determine boundary dimensions (inner diameter d, outer diameter D, width B) according to equipment design drawings. Select fit tolerances: shaft fit (k6/js6) and housing bore fit (H7/H8) comply with ISO international standards, ensuring stable installation without excessive interference or clearance.

Match Precision Grade to Application P0/P6 grade: For general industrial machinery (e.g., conveyors, agricultural equipment) with low precision requirements; P5/P4 grade: For precision equipment (e.g., high-end motors, printing machines) requiring high rotation accuracy and low noise.

Select Material & Seal/Cage Configuration:Standard working conditions: GCr15 steel + open/ZZ shielded type + stamped steel cage, cost-effective; Dusty/humid environments: GCr15 steel + 2RS sealed type + brass cage, maintenance-free; Corrosive environments: SUS440C/SUS304 stainless steel + 2RS sealed type, corrosion-resistant; High-speed/low-noise scenarios: GCr15 steel + ZZ shielded type + reinforced Nylon 66/phenolic resin cage.

Verify Load & Speed Capacity:Ensure the bearing’s radial 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 (matching the selected lubrication method) is higher than the equipment’s maximum operating speed, avoiding overspeed-induced heat generation and lubrication failure.

Evaluate Supplier Qualification:Prioritize professional manufacturers with mature production capabilities (e.g., NewBee Transmission), verifying ISO quality certification, advanced production equipment (CNC precision grinders), and comprehensive testing reports. Evaluate after-sales service such as warranty periods and technical support to ensure reliable supply and maintenance.

Manufacturer of Double Row Deep Groove Ball Bearing

NewBee Transmission is a professional manufacturer and supplier of high-quality Double Row Deep Groove Ball Bearings, focusing on providing reliable bearing solutions for global customers in automotive, industrial machinery, electric motors, and precision equipment fields. With advanced manufacturing technology, strict quality control, and customer-centric services, it has become a trusted partner for large industrial enterprises worldwide.

Comprehensive Product Range:The standard product line covers core series including 4200, 4300, 5200, and 5300, with inner diameter 10–100 mm, outer diameter 30–215 mm, and width 14–73 mm. Precision grades include P0, P6, P5, and P4, with structural options of open-type, shielded (ZZ), and contact sealed (2RS) models. Material options include GCr15 high-carbon chromium steel and SUS440C/SUS304 stainless steel, fully complying with ISO international standards.

Advanced Production & Testing Capabilities:Equipped with internationally advanced CNC precision grinders, automatic steel ball sorting machines, integral heat treatment lines, and sealed bearing grease filling equipment, the company implements automated production throughout the process. The professional testing center conducts comprehensive inspections (load capacity, precision runout, noise, fatigue life) on finished products, ensuring 100% qualification rate before delivery.

Professional Customization Services:The R&D team consists of senior engineers with over 15 years of bearing design experience, providing one-stop customized solutions: non-standard size design, special material modification (corrosion-resistant, high-temperature resistant), cage/seal optimization, and low-noise lubrication solutions. The sample development cycle for customized models is negotiated based on complexity, with urgent production support for critical projects.

Reliable Quality Assurance & After-Sales Service:All products comply with ISO quality management system standards, with a standard warranty period of 12 months. The 24/7 technical support team offers on-site installation guidance, maintenance training, and rapid fault diagnosis. For product quality issues caused by manufacturing defects, free replacement services are provided to ensure uninterrupted customer production.

Efficient Logistics & Supply Chain:The company has a large intelligent warehousing center, with standard models in stock for fast delivery within 5–10 days. Cooperating with global logistics partners (DHL, FedEx), it achieves efficient delivery to customers worldwide, supporting just-in-time production plans.

Precautions for Double Row Deep Groove Ball Bearing

Proper installation, lubrication, and maintenance are critical to maximizing the service life and performance of Double Row Deep Groove Ball Bearings. Key precautions are as follows:

Standardized Installation Operation:Before 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 inner/outer ring end face; strictly prohibit hammering or impact knocking, which causes raceway deformation and precision loss. Ensure coaxiality of the shaft and housing bore (≤0.02 mm) to avoid uneven load distribution.

Scientific Lubrication Management:Select lubricants based on temperature and speed: standard conditions use lithium-based grease (NLGI 2); high-temperature environments (≤120°C) use high-temperature complex lithium grease; low-noise requirements use low-friction grease. Open-type bearings require grease replacement every 800–1500 working hours; sealed models are pre-filled with long-life grease and do not require additional filling during the service life. Avoid over-lubrication (causes overheating) or insufficient lubrication (leads to dry friction).

Real-Time Operation Monitoring:During equipment operation, continuously monitor the bearing’s temperature, vibration, and noise. The normal operating temperature ranges from 30°C to 80°C, with a 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, and ventilated environment with relative humidity ≤60%, avoiding contact with corrosive substances, direct sunlight, and strong magnetic fields. Store horizontally in original packaging to prevent ring deformation, and prohibit heavy stacking. During transportation, use shockproof packaging to avoid collision and dropping, preserving precision.

Regular Inspection & Maintenance:Conduct periodic disassembly inspections according to equipment operating cycles (3–6 months for heavy-duty applications). Check for raceway/steel ball wear (no pitting, peeling), cage integrity (no deformation, fracture), and seal condition (no grease leakage). Replace worn bearings promptly to avoid secondary damage to the shaft and housing bore. After inspection, clean components thoroughly with non-corrosive cleaning agents, reapply qualified lubricant, and reinstall correctly.

Technical Specifications of Double Row Deep Groove Ball Bearing

Email: paul@newbeetrans.com

Website: www.newbeetrans.com