double row cylindrical roller bearing

Double-row cylindrical roller bearing is a type of rolling bearing with two rows of cylindrical rollers, widely used in industrial equipment requiring high rigidity and load carrying capacity. The main structure includes an inner ring, an outer ring, two columns of cylindrical rollers and a cage. Due to the double-row design, the roller is in linear contact with the raceway, which can withstand greater radial loads while providing higher rigidity and stability. Double-row cylindrical roller bearings are suitable for high-precision and high-speed operation conditions, and are often used in machine tool spindles, rolling mills, heavy machinery and other fields. Although it mainly bears radial loads, it can also bear certain axial loads. Regular lubrication and maintenance can extend its service life and ensure reliable operation of the equipment.

Изображение может отличаться от изделия. Подробности см. в технических характеристиках.

Характеристики

Standard: GB,ASTM/AISI,ГОСТ,BS,JIS,NF,DIN / VDEh
Material: 52100、100Cr6、SUJ2
Range of Inner Ring Dia.: 25-440mm
Range of Outer Ring Dia.: 40-1100mm
Range of Weight: 0.1-600kg
Brand: QIBR/OEM/Neutral
Package: QIBR/Standard Industrial Package/OEM
Applications: Spinspindle of large motors,Machine tool spindle

Подбор моделей QIBR

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Подбор моделей QIBR
№	Модель продукта	Inner diameter	Outer diameter	Basic dynamic load rating	Weight	Total width
1	NN30/500	500 mm	720 mm	2580 kN	205 kg	167 mm
2	NN30/500-AS-K-M-SP	500 mm	720 mm	2650 kN	214.00 kg	167 mm
3	NN30/500K	500 mm	720 mm	2580 kN	205 kg	167 mm
4	NN30/530	530 mm	780 mm	3200 kN	280 kg	185 mm
5	NN30/530K	530 mm	780 mm	3200 kN	280 kg	185 mm
6	NN3005MB	25 mm	47 mm	25.8 kN	0.121 kg	16 mm
7	NN3005MBKR	25 mm	47 mm	25.8 kN	0.121 kg	16 mm
8	NN3006-AS-K-M-SP	30 mm	55 mm	29 kN	0.19 kg	19 mm
9	NN3006MB	30 mm	55 mm	31 kN	0.186 kg	19 mm
10	NN3006MBKR	30 mm	55 mm	31 kN	0.186 kg	19 mm
11	NN3006TB	30 mm	55 mm	31 kN	0.171 kg	19 mm
12	NN3006TBKR	30 mm	55 mm	31 kN	0.171 kg	19 mm
13	NN3006ZTB	30 mm	55 mm	18.3 kN	0.152 kg	19 mm
14	NN3006ZTBKR	30 mm	55 mm	18.3 kN	0.152 kg	19 mm
15	NN3007-AS-K-M-SP	35 mm	62 mm	36 kN	0.25 kg	20 mm
16	NN3007MB	35 mm	62 mm	39.5 kN	0.297 kg	20 mm
17	NN3007MBKR	35 mm	62 mm	39.5 kN	0.297 kg	20 mm
18	NN3007TB	35 mm	62 mm	39.5 kN	0.227 kg	20 mm
19	NN3007TBKR	35 mm	62 mm	39.5 kN	0.227 kg	20 mm
20	NN3007ZTB	35 mm	62 mm	23.3 kN	0.198 kg	20 mm
21	NN3007ZTBKR	35 mm	62 mm	23.3 kN	0.198 kg	20 mm
22	NN3008-AS-K-M-SP	40 mm	68 mm	45 kN	0.30 kg	21 mm
23	NN3008MB	40 mm	68 mm	50 kN	0.356 kg	21 mm
24	NN3008MBKR	40 mm	68 mm	50 kN	0.356 kg	21 mm
25	NN3008TB	40 mm	68 mm	50 kN	0.269 kg	21 mm

The double row cylindrical roller bearings have addressed several key issues across various fields, primarily reflected in the following aspects:

1. High rigidity

Due to the double row roller design, these bearings offer higher rigidity compared to single row bearings, effectively reducing vibration and improving equipment stability.

2. Adaptability to high-speed operation:

While primarily designed to handle heavy loads, the precision manufacturing process allows these bearings to support high-speed operation while maintaining smooth performance.

3. Effective noise control

High-precision double row cylindrical roller bearings, through precise installation, proper lubrication, and advanced monitoring systems, can effectively reduce operational noise and enhance overall equipment performance.

4. High cost-effectiveness

The design of double row precision cylindrical roller bearings allows for efficient load support in relatively compact spaces. Their use can reduce costs while improving rigidity and stability.

Performance enhancements and solutions for double row cylindrical roller bearings

1. Dustproof and waterproof design

Especially in harsh environments, bearings require sufficient protection to prevent dust, mud, and other contaminants from entering the bearing interior. Sealing designs can achieve this, thereby avoiding impacts on bearing performance and lifespan.

2. Roller optimization

Optimizing roller shapes can reduce contact stress, improve load capacity, and enhance durability. Surface treatments on rollers can reduce friction, improve rolling precision and load capacity, and extend bearing life.

3. Improved manufacturing precision

Using advanced foreign processing equipment and techniques, such as precision grinding and superfinishing, enhances the geometric accuracy of inner and outer rings and rollers, reducing machining errors and improving rotational precision and surface finish.

4. Enhanced material performance

Surface coating technologies can improve wear resistance and corrosion resistance, effectively extending bearing life, especially in harsh working environments where bearing performance can be significantly enhanced.

Main application fields of double row cylindrical roller bearing

1. Machine tools

In high-precision machine tools, double row precision cylindrical roller bearings are used to withstand heavy loads, ensuring machining accuracy and stability.

2. Locomotive axle boxes

Подбор моделей QIBR

The double row cylindrical roller bearings have addressed several key issues across various fields, primarily reflected in the following aspects:

1. High rigidity

Due to the double row roller design, these bearings offer higher rigidity compared to single row bearings, effectively reducing vibration and improving equipment stability.

2. Adaptability to high-speed operation:

While primarily designed to handle heavy loads, the precision manufacturing process allows these bearings to support high-speed operation while maintaining smooth performance.

3. Effective noise control

4. High cost-effectiveness

The design of double row precision cylindrical roller bearings allows for efficient load support in relatively compact spaces. Their use can reduce costs while improving rigidity and stability.

Performance enhancements and solutions for double row cylindrical roller bearings

1. Dustproof and waterproof design

2. Roller optimization

3. Improved manufacturing precision

4. Enhanced material performance

Main application fields of double row cylindrical roller bearing

1. Machine tools

In high-precision machine tools, double row precision cylindrical roller bearings are used to withstand heavy loads, ensuring machining accuracy and stability.

2. Locomotive axle boxes