double row cylindrical roller bearings ZYS
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Double row cylindrical roller bearing

For the N30 series cylindrical roller bearings, the ribs are set on the inner ring, and the outer ring can be separated: while for NNU49 series cylindrical roller bearings, the ribs are set on the outer ring, and the inner ring can be separated. For double row cylindrical roller bearings, when lubricated with oil, a ring-shaped oil groove and three oil holes with symmetrical distribution are arranged in the middle of the outer ring of the bearing, marked as W33.

Double row cylindrical roller bearings have two types of bearing holes: cylindrical bore, tapered bore. Since cylindrical roller bearings with tapered bores are easy to adjust radial installation clearance after installation, the most commonly used cylindrical roller bearings in machine tools are double row cylindrical roller bearings with tapered bores. This kind of bearing can only bear large radial load, and inner and outer ring can be separated, so it is often used in combination with bidirectional thrust angular contact ball bearing which can bear axial load. ZYS can also offer single row cylindrical roller bearings.

  • RELATED INDUSTRIES

Bearing

designation

ZYS

Boundary dimension

Rated load

Limit speed

Radial stiffness Rr

KN/m

Weight KG

d

D

B

rsmin

E

Cr

Cor

Grease

Oil

mm

KN

r/min

NN3006

30

55

19

1.0

48.5

29

34

16000

19000

0.6

0.19

NN3007

35

62

20

1.0

61

35.5

44

14000

17000

0.7

0.25

NN3008

40

68

21

1.0

61

45

58.5

12000

15000

0.9

0.31

NN3009

45

75

23

1.0

67.5

54

72

11000

14000

1.0

0.40

NN3010

50

80

23

1.0

72.5

57

80

10000

13000

1.1

0.41

NN3011

55

90

26

1.1

81

72

100

9000

11000

1.3

0.65

NN3012

60

95

26

1.1

86.1

75

110

8500

10000

1.4

0.67

NN3013

65

100

26

1.1

91

76.5

116

8000

9500

1.4

0.74

NN3014

70

110

30

1.1

100

98

150

7000

8500

1.6

1.07

NN3015

75

115

30

1.1

106

100

156

6700

8000

1.7

1.13

NN3016

80

125

34

1.1

113

120

186

6300

7500

1.8

1.56

NN3017

85

130

34

1.1

118

125

200

6000

7000

1.9

1.64

NN3018

90

140

37

1.5

127

140

224

5600

6700

2.0

2.13

NN3019

95

145

37

1.5

132

143

236

5300

6300

2.1

2.23

NN3020

100

150

37

1.5

137

146

245

5300

6300

2.1

2.32

NN3021

105

160

41

2.0

146

190

310

4800

5600

2.3

2.96

NN3022

110

170

45

2.0

155

220

360

4500

5300

2.5

3.76

NN3024

120

180

46

2.0

165

232

390

4300

5000

2.7

4.10

NN3026

130

200

52

2.0

182

290

500

3800

4500

2.9

6.04

NN3028

140

210

53

2.0

192

300

520

3600

4300

3.0

6.48

NN3030

150

225

56

2.1

206

335

585

3400

4000

3.3

7.88

NN3032

160

240

60

2.1

219

375

670

3200

3800

3.5

9.57

NN3034

170

260

67

2.1

236

450

800

3000

3600

3.7

13.0

NN3036

180

280

74

2.1

255

570

1000

2800

3400

4.0

17.0

NN3038

190

290

75

2.1

265

585

1040

2600

3200

4.1

18.0

NN3040

200

310

82

2.1

282

655

1200

2400

3000

4.4

23.0

NN3044

220

340

90

3.0

310

800

1460

2200

2800

4.7

30.0

NN3048

240

360

92

3.0

330

850

1560

2000

2600

5.1

32.4

NN3052

260

400

104

4.0

364

1060

2000

1900

2400

5.6

47.0

NN3056

280

420

106

4.0

384

1080

2080

1800

2200

5.8

50.5

NN3060

300

460

118

4.0

418

1270

2400

1600

1900

5.9

68.8

NN3064

320

480

121

4.0

438

1320

2600

1600

1900

6.4

74.2

NN3068

340

520

133

5.0

473

1630

3250

1400

1700

7.2

99.3

NN3072

360

540

134

5.0

493

1660

3350

1400

1700

7.4

104

NN3076

380

560

135

5.0

513

1700

3450

1300

1600

7.6

110

NN3080

400

600

148

5.0

549

2160

4500

1200

1500

8.7

143

NN3084

420

620

150

5.0

569

2120

4500

1200

1500

8.7

150

NN3088

440

650

157

6.0

597

2450

5100

1100

1400

9.2

172

NN3092

460

680

163

6.0

624

2600

5400

1100

1400

9.4

197

NN3096

480

700

165

6.0

644

2700

5850

1000

1300

10.1

206

NN30/500

500

720

167

6.0

664

2650

5850

1000

1300

10.1

214

MACHINE TOOL

Machine tool is the carrier of advanced manufacturing technology and the basic production means of equipment industry. It is the basic equipment for equipment manufacturing industry, mainly for automobile, military, agricultural machinery, engineering machinery, electric power equipment, railway locomotive, ship and other industries. Machine tool performance plays an increasingly important role in production efficiency and product quality and also has high demand for more reliable and energy efficient components.

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VEHICLE

Driven by increasing environmental awareness and stricter emission regulations, the automotive industry is undergoing an unprecedented period of change. Computer technology has been used in the control and monitoring devices of many vehicle systems. New materials for cars, such as light alloys, have been gradually used in mainstream cars, and new technologies allow for further emissions cuts.

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RAILWAY

Railway transportation is one of the main ways of transportation. As the main means of railway transportation, train technology is constantly innovating. Freight vehicles with increasing load, locomotive vehicles with increasing traction, or passenger vehicles with increasing running speed are affecting people's way of life.

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MOTORCYCLE

Each motorcycle is usually equipped with 20 to 30 bearings. These bearings are used for important rotating parts such as engines, transmissions, and wheels to support driving, and are responsible for reducing friction and driving the engine power to the wheels. Therefore, the performance required for motorcycle bearings is to achieve smooth rotation through low friction, low vibration and high durability. These performance affect the fuel consumption and safety that are closely related to our life. ZYS always pays attention to these details and strives to develop bearing and optimize the bearing design to improve the quality of life and protect the global environment.

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AGRICULTURE

Agricultural engineering involves a wide range of machinery, equipment and tools, most of which are specially designed and manufactured according to the characteristics of agriculture and the special requirements of various operations, such as soil tillage machinery, planting and fertilization machinery, plant protection machinery, crop harvesting machinery, animal husbandry machinery and agricultural products processing machinery, etc. Another part of agricultural machinery is common to other industries, and can be directly selected according to the characteristics and needs of agriculture, such as agricultural power machinery, water pumps in farmland irrigation and drainage machinery, etc.; or design these machinery into agricultural variants according to the characteristics and needs of agriculture, such as agricultural vehicles, trailers in agricultural transport machinery, stone machinery in farmland construction machinery.

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ELECTRIC MOTOR

Motors are used as power sources in all industries. In the development of the electrification of power sources, in order to meet the requirements of environmental protection, low energy loss and high reliability, ZYS continuously developed high-performance bearings with low friction. These bearings are widely used in the rotating part of the motor, which can play a significant role in bearing the load carried by the motor while supporting smooth and quiet rotation.

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METALLURGY AND CONSTRUCTION

There are many kinds of metallurgical equipment, including not only the equipment needed by the raw material factory, but also the equipment needed from the upstream process to the downstream process, such as steelmaking process, steel rolling process and leveling process. These bearings are used under the special conditions of iron powder, water and heat of metallurgical equipment, so they need to meet the requirements of heavy load , vibration shock, from ultra-low speed to high-speed & rapid acceleration and deceleration. "Stable operation and improved production efficiency" can be described as a representative industry in the field of metallurgical equipment. ZYS is not only in bearing design technology, but also in various aspects such as bearing material technology, lubrication technology, and analytical technology.

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OIL AND GAS

Oil and gas technology is developing at a very rapid pace, and exploiting deeper oil and gas resources in harsher environments means that the top drives need more power to withstand higherloads.When unforeseen downtime costs are as high as $1 million per day, the reliability of equipment becomes particularly important, and the reliability of key parts of the bearing directly determines the performance of the equipment.

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WIND ENERGY

As a renewable and clean energy source, wind power is rapidly developing all over the world. Large wind turbines are giant machinery. Nowadays, many 2MW wind power plants under construction have wind turbine blades with a length of about 40 meters, a rotating shaft with a height of 60 to 100 meters and total weight of more than 200 tons. Therefore, the bearings used in wind power must also be large, with an inner diameter ranging from 100 mm to 700 mm. Some models require bearings with an inner diameter of nearly 2 meters. Bearings for wind turbines require high reliability, because the bearings are designed to keep the windmill running for 20 years; and when the fault occurs, the parts are not easy to replace (the bearing is used at a long distance from the ground). Bearing manufacturers need to have a high degree of computer analysis technology and exquisite skills in materials and heat treatment, and need to master the test evaluation technology for large bearing.

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