Product Description

 

Product Description

 

RU228(G)

Bearings Model Boundary Dimensions Shoulder height Basic load rating(radial) Relation between the mounting holes Weight
ID  OD  PCD  B  Oil hole rmin Inner ring Outer ring
d D dp B d1 ds Dh Cr/kN Cor/kN PCD1 mounting holes PCD2 mounting holes kg
RU228(G) 115 240 178 28 3.1 1.5 161 195 80.3 135 139 12-M8 through 217 12-ф9 throug ф14 counterbore depth 8.6 6.8

 

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

Are there specific maintenance practices that can extend the life of cross roller bearings?

Implementing proper maintenance practices is essential for extending the life of cross roller bearings. Regular maintenance helps prevent premature wear, minimize downtime, and ensure optimal performance. Here are specific maintenance practices that can contribute to extending the life of cross roller bearings:

  • Regular Inspection:
  • Perform regular inspections of cross roller bearings to detect any signs of wear, damage, or abnormal operating conditions. Visual inspections can identify visible damage, such as cracks, pitting, or corrosion. Additionally, monitoring noise, vibration, and temperature levels during operation can help identify potential issues early on.

  • Lubrication:
  • Proper lubrication is crucial for the smooth operation and longevity of cross roller bearings. Follow the manufacturer's recommendations regarding the type and quantity of lubricant to use. Establish a regular lubrication schedule and ensure that the bearings are adequately lubricated. Monitor the lubricant condition and replenish or replace it as needed to maintain optimal lubrication levels.

  • Contamination Control:
  • Preventing contamination is essential for the longevity of cross roller bearings. Implement measures to control and minimize the ingress of contaminants, such as dust, dirt, or moisture. Use appropriate sealing or shielding mechanisms to protect the bearing from external particles. Clean the surrounding area regularly and ensure that the bearing housing and mounting surfaces are free from debris.

  • Proper Mounting:
  • Ensure proper mounting and alignment of cross roller bearings to avoid unnecessary stress or misalignment that can lead to premature wear. Follow the manufacturer's guidelines for mounting procedures, including the use of suitable tools and torque values. Ensure that the mounting surfaces are clean, flat, and perpendicular to minimize stress concentrations.

  • Load and Speed Considerations:
  • Be mindful of the recommended load and speed limits specified by the bearing manufacturer. Avoid exceeding these limits as it can accelerate wear and decrease the bearing's lifespan. If operating conditions change, such as increased load or speed, consult the manufacturer for guidance on appropriate bearing selection or additional maintenance measures.

  • Periodic Reassessment:
  • Periodically reassess the operating conditions and performance of cross roller bearings. As equipment and usage patterns may change over time, it is essential to periodically review the bearing's performance and consider reevaluating maintenance practices. This can help identify potential improvements or adjustments to ensure continued reliability and longevity.

  • Training and Documentation:
  • Provide training to personnel responsible for the maintenance and operation of equipment that utilizes cross roller bearings. Ensure they are familiar with proper maintenance procedures and understand the importance of adhering to maintenance schedules. Maintain documentation of maintenance activities, including inspection reports, lubrication records, and any interventions or replacements performed.

By implementing these specific maintenance practices, it is possible to extend the life of cross roller bearings, optimize their performance, and minimize the risk of premature failures. Regular inspections, proper lubrication, contamination control, proper mounting, considering load and speed limits, periodic reassessment, and training and documentation are all key aspects of effective maintenance for cross roller bearings.

cross roller bearing

What role do seals and shields play in protecting cross roller bearings from contaminants?

Seals and shields play a crucial role in protecting cross roller bearings from contaminants. These protective devices are designed to prevent the entry of foreign particles, such as dust, dirt, moisture, and other contaminants, into the bearing system. They offer several functions that contribute to the overall protection and longevity of cross roller bearings:

  • Contamination Prevention:
  • The primary role of seals and shields is to prevent contaminants from entering the bearing. They create a physical barrier that blocks the passage of particles into the internal components of the bearing. This is particularly important in industrial environments where cross roller bearings are exposed to various contaminants that can cause damage and premature wear. By effectively sealing the bearing, seals and shields help maintain a clean and controlled operating environment, ensuring the reliable and optimal performance of the bearing.

  • Retention of Lubrication:
  • Seals and shields help retain the lubricant within the bearing, preventing its leakage and ensuring proper lubrication of the internal components. Lubrication is essential for reducing friction, minimizing wear, and dissipating heat within the bearing. The presence of seals or shields helps to retain the lubricating grease or oil, preventing its loss due to evaporation or contamination. This ensures that the cross roller bearing remains properly lubricated, promoting smooth operation and extending the service life of the bearing.

  • Protection against Moisture:
  • Moisture can be a significant source of contamination and can lead to corrosion and damage to the bearing components. Seals and shields act as a barrier against moisture ingress, preventing water or other liquids from reaching the internal parts of the bearing. By protecting against moisture, seals and shields help maintain the integrity of the bearing, reducing the risk of corrosion and preserving its performance and longevity.

  • Reduction of Friction and Wear:
  • Seals and shields also contribute to reducing friction and wear within the cross roller bearing. They provide an additional layer of protection and help minimize the contact between the rolling elements and the raceways. This reduces the frictional forces and wear on the bearing components, increasing their lifespan and improving overall efficiency. By reducing friction and wear, seals and shields help maintain the precision and performance of the cross roller bearing, ensuring smooth operation and minimizing energy losses.

  • Prevention of Lubricant Contamination:
  • Seals and shields play a vital role in preventing the contamination of the lubricant itself. They act as a barrier against external contaminants, such as dust and dirt, which can mix with the lubricant and degrade its quality. Contaminated lubricant can lead to increased friction, accelerated wear, and decreased performance of the cross roller bearing. The presence of seals and shields helps to maintain the cleanliness and integrity of the lubricant, ensuring its effectiveness in reducing friction and providing proper lubrication to the bearing components.

In summary, seals and shields play a critical role in protecting cross roller bearings from contaminants. They prevent the entry of foreign particles, retain lubrication, protect against moisture, reduce friction and wear, and prevent lubricant contamination. By effectively sealing the bearing and creating a controlled operating environment, seals and shields contribute to the longevity, reliability, and optimal performance of cross roller bearings in various applications and environments.

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.

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editor by CX 2024-05-09