Product Description

 

Product Description

 

Product Attributes

Number RU297
Bearing Type Roller
Roller Bearing Type Crossed
For Load Direction Combined Radial; Thrust; and Moment
Construction Single Row
Seal Type Open
ABEC Rating ABEC-5 ABEC-7 ABEC-9
Ring Material Steel
Roller Material Steel
Shaft dia. mm 210
Mass(kg) 21.3
Bore Dia (d) 210
Outer Dia (D) 380
Width (B) 40
Greasing hole(d1) 6
r(min) 2.5
Shoulder height ds(max) 272
Shoulder height Dh(min) 320
Basic load rating (radial)C kN 156
Basic load rating (radial)Co kN 281
Inner ring PCD1  
Lubrication Required
Shaft Mount Type Press Fit
Temperature Range 0 -230
Inner ring Mounting hole  
Outer ring PCD2  
Outer ring Mounting hole

 

 

 

 

RU series(Integrated Inner/Outer Ring type) Since the mounting holes are provided, the model does not require a presser flange or housing. In addition, because it has an integrated inner/outer ring structure and is equipped with washers, its performance is minimally affected by the mounting procedure, ensuring stable rotation accuracy and torque. 

 

 

Crossed Roller Bearings:

 

Cross Roller Bearings are a type of roller bearing with high rotation accuracy capable of bearing loads in every direction. Because it has orthogonally arranged cylindrical rollers, it can bear loads in every direction. This lets 1 crossed roller bearing replace more than 1 ball bearing, thus saving the space required by ball bearings, lowering the associated material costs.

Key benefits of cross roller bearings:
High load capacity: cross roller bearings are designed to heavy loads in compact spaces 
Unique Design: rollers arranged perpendicular to the axis of rotation which ensures smooth and precise operation through rigidity and accuracy
Durability: highly durable and built to last minimizing downtime and maintenance costs
 

Applications:

Crossed roller bearings are commonly used in precision machinery, robotics, CNC machines, and semiconductor manufacturing equipment.

 

Types Cross Roller Bearings:
 1. RA series

 2. RB series

 3. RU series

 4. SX series

 5. XU series

 6. XSU series

 7. XR/JXR series

 8. CRBF series

 9. CRBS series

10.CRBH series

11.CRBT series

 

 

Technical parameter of precision cross cylindrical roller bearings :

RA series:

TYPE Inner diameter Outer diameter Pitch diameter Height Chamfer Shoulder size   Basic rated load(Radial)   Weight
  d D Dpw B r ds Dh Cr Kn Cor Kn KG
RA 5008 50 66 57 8 0.5 53.5 60.5 5.1 7.19 0.08
RA 6008 60 76 67 8 0.5 63.5 70.5 5.68 8.68 0.09
RA 7008 70 86 77 8 0.5 73.5 80.5 5.98 9.8 0.1
RA 8008 80 96 87 8 0.5 83.5 90.5 6.37 11.3 0.11
RA 9008 90 106 97 8 0.5 93.5 100.5 6.76 12.4 0.12
RA 10008 100 116 107 8 0.5 103.5 110.5 7.15 13.9 0.14
RA 11008 110 126 117 8 0.5 113.5 120.5 7.45 15 0.15
RA 12008 120 136 127 8 0.5 123.5 130.5 7.84 16.5 0.17
RA 13008 130 146 137 8 0.5 133.5 140.5 7.94 17.6 0.18
RA 14008 140 156 147 8 0.5 143.5 150.5 8.33 19.1 0.19
RA 15008 150 166 157 8 0.5 153.5 160.5 8.82 20.6 0.2
RA 16013 160 186 172 13 0.8 165 179 23.3 44.9 0.59
RA 17013 170 196 182 13 0.8 175 189 23.5 46.5 0.64
RA 18013 180 206 192 13 0.8 185 199 24.5 49.8 0.68
RA 19013 190 216 202 13 0.8 195 209 24.9 51.5 0.69
RA 20013 200 226 212 13 0.8 205 219 25.8 54.7 0.71

RB series:

Model No. Outer dimension (mm) Installation dimension (mm) Rated load (Kn) Weight
d D B/C Rmin da Da C C0 kg
RB2008 20 36 8 0.5 23.5 30.5 3.23 3.1 0.04
RB2508 25 41 8 0.5 28.5 35.5 3.63 3.83 0.05
RB3571 30 55 10 0.6 37 47 7.35 8.36 0.12
RB3510 35 60 10 0.6 41 51.5 7.64 9.12 0.13
RB4571 40 65 10 0.6 47.5 57.5 8.33 10.6 0.16
RB4510 45 70 10 0.6 51 61.5 8.62 11.3 0.17
RB5013 50 80 13 0.6 57.4 72 16.7 20.9 0.27
RB6013 60 90 13 0.6 68 82 18 24.3 0.3
RB7013 70 100 13 0.6 78 92 19.4 27.7 0.35
RB8016 80 120 16 0.6 91 111 30.1 42.1 0.7
RB9016 90 130 16 1 98 118 31.4 45.3 0.75
RB10016 100 140 16 1 109 129 31.7 48.6 0.83
RB1571 100 150 20 1 113 133 33.1 50.9 1.45
RB11012 110 135 12 0.6 117 127 12.5 24.1 0.4
RB11015 110 145 15 0.6 122 136 23.7 41.5 0.75
RB11571 110 160 20 1 120 143 34 54 1.56
RB12016 120 150 16 0.6 127 141 24.2 43.2 0.72
RB12571 120 180 25 1.5 133 164 66.9 100 2.62
RB13015 130 160 15 0.6 137 152 25 46.7 0.72
RB13571 130 190 25 1.5 143 174 69.5 107 2.82
RB14016 140 175 16 1 147 162 25.9 50.1 1
RB14571 140 200 25 1.5 154 185 74.8 121 2.96
RB15013 150 180 13 0.6 157 172 27 53.5 0.68

RB15571 150 210 25 1.5 164 194 76.8 128 3.16
RB15030 150 230 30 1.5 173 211 100 156 5.3
RB16571 160 220 25 1.5 173 204 81.7 135 3.14
RB17571 170 220 20 1.5 184 198 29 62.1 2.21
RB18571 180 240 25 1.5 195 225 84 143 3.44
RB19571 190 240 25 1 202 222 41.7 82.9 2.99
RB20571 200 260 25 2 215 245 84.2 157 4
RB20030 200 280 30 2 221 258 114 200 6.7
RB20035 200 295 35 2 225 270 151 252 9.6
RB22571 220 280 25 2 235 265 92.3 171 4.1
RB24571 240 300 25 2.5 256 281 68.3 145 4.5
RB25571 250 310 25 2.5 265 290 69.3 150 5
RB25030 250 330 30 2.5 269 306 126 244 8.1
RB25040 250 355 40 2.5 275 326 195 348 14.8
RB30571 300 360 25 2.5 315 340 76.3 178 5.9
RB30035 300 395 35 2.5 322 368 183 367 13.4
RB30040 300 405 40 2.5 326 377 212 409 17.2
RB35571 350 400 20 2.5 363 383 54.1 143 3.9
RB40035 400 480 35 2.5 422 459 156 370 14.5
RB40040 400 510 40 2.5 428 479 241 531 23.5
RB45571 450 500 25 1 464 484 61.7 182 6.6
RB50571 500 550 25 1 514 534 65.5 201 7.3
RB50040 500 600 40 2.5 526 572 239 607 26
RB50050 500 625 50 2.5 536 587 267 653 41.7
RB60040 600 700 40 3 627 673 264 721 29
RB70045 700 815 45 3 731 777 281 836 46
RB80070 800 950 70 4 836 900 468 1330 105
RB90070 900 1050 70 4 937 1001 494 1490 120
RB1000110 1000 1250 110 5 1057 1171 1220 3220 360
RB1250110 1250 1500 110 5 1308 1423 1350 3970 440

RU series:

Designation

Size

Shoulder dimension

Basic Load rating

Quality

Model

d

D

Dpw

B

rmin

ds  Dh

Cr
kN

Cor
kN

Kg

RU28

10 52 27.3 8 0.3 24 29.5 29 24 0.12

RU42

20 70 41.5 12 0.6 37 47 7.35 8.35 0.29

RU66

35 95 66 15 0.6 59 74 17.5 22.3 0.62

RU85

55 120 85 15 0.6 79 93 20.3 29.5 1

RU124(G)
RU124X

80 165 124 22 1 114 134 33.1 50.9 2.6

RU148(G)
RU148X

90 210 148 25 1.5 133 162 49.1 76.8 4.9

RU178(G)
RU178X

115 240 178 28 1.5 161 195 80.3 135 6.8

RU228(G)
RU228X

160 295 227.5 35 2 208 246 104 173 11.4
RU297(G)
RU297X
210 380 297.3 40 2.5 272 320 156 281 21.3
RU445(G)
RU445X
350 540 445.4 45 2.5 417 473 222 473 3504

 

Packaging & Shipping

Packing:

Please contact us for more pictures of different packing.

Universal Packing

Without any logo on bearings or packing.

JDZ Packing

With our brand JDZ on bearings and packing.

Customized Packing

Depends on buyer's requirements.

Original Brand Packing

Bearing and packing are both original. Please contact us for pictures.

 

QUALITY ASSURANCE

100% Quality inspection to ensure the bearings are with good quality before shipping. 

Company Profile

 

 

ZheJiang CZPT Precision Bearing Co.,Ltd. was founded by ZheJiang Defa Bearing Co.,Ltd, factory is located in ZheJiang province, China. 
We are a bearing manufacturer integrating the research, development and sales of bearings, with a floor area of 18,000 square meters and a plant area of 8,800 square meters. Equipped with modern production equipment and advanced detection instruments. 

We can provide all types bearings and OEM service according to customers' requirements. 

Our products are widely used in the automobile, agricultural, textile production, mining, printing and packing industries, in addition to various applications at airports, in air-conditioning systems, conveying devices, ships ad so on. Our products are being exported to more than 50 countries and regions overseas including Singapore, Thailand, Iran, Turkey, Poland, Italy, England, France, Russia, Germany, the United States, Australia, Argentina, Brazil as well as other countries and regions all over the world.

We are a trusted and reliable bearing supplier, choose us to be your good partner!

More choices

 

FAQ

1. Q: Are you trading company or manufacturer ?
   A: We have our own factory , our type is factory + trade.

2. Q: Could you accept OEM and customize?
    A: Yes, we can customize products according to your sample or drawing.

3. Q: How long is your delivery time? 
    A: If stock, within 7 days to ship or based on your order quantity.

4. Q: Could you supply sample for free? 
    A: Yes, we can offer the sample for free,do you mind to buy a "ticket" for her?

More details, please contact with us. Thanks for your time!

 

 

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Standard or Nonstandard: Standard
Feature: High Speed, Vacuum, Antimagnetic, Cold-Resistant, Corrosion-Resistant, Heat-Resistant
Sealing Gland: Non-Seal
Rolling-Element Number: Single-Row
Roller Type: Straight Raceway
Material: Bearing Steel
Samples:
US$ 0.1/Piece
1 Piece(Min.Order)

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Request Sample

Customization:
Available

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Customized Request

cross roller bearing

Can you provide examples of scenarios where precision and rigidity are crucial with cross roller bearings?

Precision and rigidity are critical requirements in various scenarios where cross roller bearings are employed. These bearings excel in applications that demand accurate motion control, minimal deflection, and high stiffness. Here are some examples of scenarios where precision and rigidity are crucial with cross roller bearings:

  • Robotic Arm Joints:
  • Robotic arm joints require precise and repeatable motion for tasks such as pick-and-place operations, assembly, and welding. Cross roller bearings provide the necessary rigidity to withstand the loads and maintain accurate positioning, ensuring smooth and controlled movement of the robotic arm.

  • Machine Tool Spindles:
  • In machine tools, such as milling machines and lathes, the spindle's precision and rigidity are crucial for achieving accurate and high-quality machining. Cross roller bearings used in machine tool spindles enable precise rotation with minimal deflection, ensuring the accuracy and surface finish of the machined components.

  • Precision Optical Instruments:
  • In precision optical instruments like telescopes and microscopes, cross roller bearings are employed in stages and mounts to enable precise positioning and alignment. The rigidity of these bearings ensures stability and eliminates unwanted vibrations, allowing for clear and accurate observations or measurements.

  • Coordinate Measuring Machines (CMMs):
  • CMMs are used for dimensional inspection and measurement of complex parts. Cross roller bearings are crucial in the moving stages of CMMs, providing the necessary rigidity and precision to accurately position the probing system. This ensures precise and repeatable measurements with high accuracy.

  • Semiconductor Wafer Handling:
  • In semiconductor manufacturing, cross roller bearings are used in wafer handling robots and stages. These bearings enable precise and controlled motion during wafer loading, alignment, and transfer. The rigidity of cross roller bearings ensures accurate positioning of wafers, critical for the manufacturing of integrated circuits with nanoscale precision.

  • Aircraft Control Surfaces:
  • Aircraft control surfaces, such as ailerons, elevators, and rudders, require precise and responsive movement for safe and efficient flight control. Cross roller bearings are employed in the hinge mechanisms of these control surfaces, providing the necessary rigidity and accuracy to ensure precise control inputs and aerodynamic stability.

  • Surgical Robots:
  • In surgical robots, precision and rigidity are crucial for performing delicate and precise surgical procedures. Cross roller bearings are used in robotic joints and arms to enable precise and controlled movement of surgical tools. The rigidity of these bearings ensures accurate positioning and minimizes any unintended motion during surgery.

  • Solar Tracking Systems:
  • In solar tracking systems, which orient solar panels to maximize energy capture, precision and rigidity are essential for accurate tracking throughout the day. Cross roller bearings used in solar tracking systems provide the necessary stiffness to withstand wind loads and maintain precise alignment, optimizing energy generation from sunlight.

In summary, precision and rigidity are crucial in scenarios where cross roller bearings are utilized. Examples include robotic arm joints, machine tool spindles, precision optical instruments, coordinate measuring machines, semiconductor wafer handling, aircraft control surfaces, surgical robots, and solar tracking systems. In these applications, cross roller bearings ensure accurate motion control, minimal deflection, and reliable performance, allowing for precise operations, measurements, and control in various industries.

cross roller bearing

Can you provide insights into recent advancements in cross roller bearing technology?

Recent advancements in cross roller bearing technology have brought significant improvements in performance, reliability, and application versatility. Ongoing research and development efforts have led to innovative designs and materials, enhanced manufacturing processes, and improved functionality. Here are some key insights into the recent advancements in cross roller bearing technology:

  • Advanced Materials:
  • New materials and alloys have been developed to enhance the performance of cross roller bearings. For example, the use of high-strength steels and advanced ceramics has improved the bearing's load-carrying capacity, durability, and resistance to wear and fatigue. These materials offer better mechanical properties, increased hardness, and improved corrosion resistance, making them suitable for demanding applications in industries such as aerospace, automotive, and robotics.

  • Improved Sealing and Lubrication:
  • Advancements in sealing and lubrication technologies have addressed challenges related to contamination, maintenance, and operating conditions. Innovative sealing solutions, such as integrated seals and multi-lip designs, provide better protection against contaminants, extending the bearing's service life. Additionally, advancements in lubrication techniques, such as solid lubricants and advanced greases, offer improved performance in high-temperature, high-speed, and harsh environments.

  • Enhanced Precision and Accuracy:
  • Recent advancements have focused on improving the precision and accuracy of cross roller bearings. Manufacturers have developed new manufacturing processes and technologies to achieve tighter tolerances and reduce dimensional variations. This results in improved positioning accuracy, smoother motion, and enhanced repeatability. These advancements are particularly beneficial in applications that require high precision, such as machine tools, robotics, and optical systems.

  • Intelligent Monitoring and Condition Assessment:
  • The integration of sensors, data acquisition systems, and advanced analytics has enabled intelligent monitoring and condition assessment of cross roller bearings. These advancements allow real-time monitoring of bearing performance, temperature, vibration, and other operating parameters. By collecting and analyzing data, it is possible to detect early signs of wear, identify potential faults, and optimize maintenance strategies. This proactive approach helps prevent unexpected failures, reduce downtime, and improve overall operational efficiency.

  • Application-Specific Designs:
  • Manufacturers are developing cross roller bearings with application-specific designs to meet the unique requirements of various industries. Customized bearing geometries, configurations, and mounting options are being developed to optimize performance in specific applications. For instance, specialized designs for robotics offer increased rigidity and compactness, while bearings for medical equipment prioritize cleanliness and corrosion resistance. These application-specific designs enable better integration, improved performance, and enhanced reliability in specific industries and applications.

  • Simulation and Virtual Testing:
  • Advancements in simulation and virtual testing techniques have played a significant role in cross roller bearing development. Computer-aided design (CAD) software and finite element analysis (FEA) tools allow engineers to simulate the behavior and performance of bearings under various operating conditions. Virtual testing helps optimize designs, evaluate different materials and configurations, and shorten the development cycle. This approach enables more efficient and cost-effective product development while ensuring performance and reliability.

In summary, recent advancements in cross roller bearing technology have brought about significant improvements in materials, sealing and lubrication, precision, monitoring capabilities, application-specific designs, and simulation techniques. These advancements have expanded the capabilities and performance of cross roller bearings, enabling their use in a wide range of industries and applications. With ongoing research and innovation, cross roller bearings are expected to continue evolving to meet the ever-increasing demands of modern machinery and equipment.

cross roller bearing

What advantages do cross roller bearings offer compared to other bearing types?

Cross roller bearings offer several advantages compared to other bearing types. Their unique design and configuration provide distinct benefits, making them preferred choices in various applications. Here are the advantages of cross roller bearings over other bearing types:

  • High Load Capacity:
  • Cross roller bearings can handle both radial and axial loads simultaneously, allowing them to support high load capacities. The arrangement of cylindrical rollers in a cross pattern enables efficient load distribution, resulting in improved load-carrying capacity compared to other bearing types. This makes cross roller bearings suitable for applications that require high load-carrying capability without sacrificing precision.

  • Space-Saving Design:
  • One of the significant advantages of cross roller bearings is their compact and space-saving design. The arrangement of rollers at right angles to each other and the thin-walled rings contribute to a slim profile. This compact design allows for efficient use of available space in applications where installation space is limited. Cross roller bearings are particularly advantageous in equipment and machinery where size and weight reduction are crucial factors.

  • High Rigidity:
  • Compared to other bearing types, cross roller bearings offer exceptional rigidity. The cross arrangement of rollers and the preloading of the bearing contribute to increased stiffness and resistance to deformation. This high rigidity ensures precise positioning and minimizes deflection under load, making cross roller bearings suitable for applications that demand high accuracy and stability, such as precision machining, robotics, and optical instruments.

  • Precision and Accuracy:
  • Cross roller bearings are known for their excellent rotational accuracy and precise motion control. The arrangement of rollers and the low-friction design result in minimal clearance and backlash, enabling precise positioning and smooth operation. This makes cross roller bearings ideal for applications that require high precision, such as machine tools, robotics, and scientific instruments.

  • Moment Load Capability:
  • Due to their unique design, cross roller bearings offer exceptional moment load-carrying capability. They can handle both radial and axial moments, making them suitable for applications with complex loads. The ability to withstand moments enables cross roller bearings to support rotational movements and resist forces acting perpendicular to the bearing axis. This makes them advantageous in applications such as robotics, rotary tables, and indexing heads.

  • Reduced Friction and Wear:
  • Cross roller bearings exhibit low friction and wear characteristics. The rolling motion of cylindrical rollers reduces sliding friction, resulting in improved efficiency and reduced heat generation. Additionally, the use of high-quality materials and advanced lubrication techniques further minimizes friction and wear, contributing to extended bearing life and reduced maintenance requirements.

In summary, cross roller bearings offer distinct advantages compared to other bearing types. Their high load capacity, space-saving design, high rigidity, precision and accuracy, moment load capability, as well as reduced friction and wear make them preferred choices in various applications. Whether it's in robotics, machine tools, medical equipment, or scientific instruments, the unique performance characteristics of cross roller bearings contribute to enhanced performance, reliability, and efficiency in numerous industrial sectors.

China Good quality Ru297X Ru297g Ru297 210mm*380mm*40mm China Manufacturer Cylindrical Robot Bearing Turntable Slewing Ring P4 P5 P2 Cross Roller Bearing for Robot   bearing blockChina Good quality Ru297X Ru297g Ru297 210mm*380mm*40mm China Manufacturer Cylindrical Robot Bearing Turntable Slewing Ring P4 P5 P2 Cross Roller Bearing for Robot   bearing block
editor by CX 2024-04-16