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 |
Cor |
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) |
80 | 165 | 124 | 22 | 1 | 114 | 134 | 33.1 | 50.9 | 2.6 |
RU148(G) |
90 | 210 | 148 | 25 | 1.5 | 133 | 162 | 49.1 | 76.8 | 4.9 |
RU178(G) |
115 | 240 | 178 | 28 | 1.5 | 161 | 195 | 80.3 | 135 | 6.8 |
RU228(G) |
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 |
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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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Customization: |
Available
| Customized Request |
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What Role do Seals and Enclosures Play in Protecting Slewing Bearings from Contaminants?
Seals and enclosures play a crucial role in safeguarding slewing bearings from contaminants, moisture, and other external factors that can lead to premature wear and damage. Here’s how seals and enclosures contribute to the protection of slewing bearings:
- Contaminant Exclusion:
Seals and enclosures create a physical barrier that prevents contaminants like dust, dirt, sand, and particles from entering the bearing’s internal components. This exclusion minimizes abrasive wear and preserves the integrity of the rolling elements and raceways.
- Moisture and Corrosion Prevention:
Seals and enclosures provide a shield against moisture and water ingress, crucial in preventing corrosion and rust formation on bearing surfaces. Corrosion-resistant seals are particularly valuable in marine and humid environments.
- Chemical and Chemical Vapor Resistance:
Specialized seals and enclosures can offer resistance to chemicals, acids, and corrosive substances that might be present in the operating environment. This protection prevents chemical damage to the bearing’s components.
- Lubrication Retention:
Seals and enclosures help retain the lubricant within the bearing, preventing it from leaking out and ensuring consistent lubrication for smooth operation. This is essential for reducing friction and wear.
- Prevention of Solid Particle Contamination:
Seals and enclosures block solid particles from entering the bearing chamber, reducing the risk of particle-induced wear, surface damage, and premature failure.
- Temperature Regulation:
Some seals and enclosures offer thermal insulation, which helps regulate the operating temperature of the bearing. This can be crucial in applications with extreme temperature variations.
- Enhanced Longevity:
By protecting the bearing from contaminants and adverse environmental conditions, seals and enclosures contribute to the extension of the bearing’s operational life, reducing the need for frequent replacements.
- Sealing Types:
Seals can come in various types, including lip seals, labyrinth seals, and specialized designs. The choice of seal depends on the application’s requirements and the level of protection needed.
- Proper Installation and Maintenance:
Proper installation and regular inspection of seals and enclosures are essential to ensure their effectiveness. Damaged or worn seals should be promptly replaced to maintain protection.
In summary, seals and enclosures serve as a critical defense mechanism for slewing bearings against contaminants, moisture, and harmful substances. They contribute to the bearing’s reliability, performance, and overall longevity in various operating environments.
How does Preload Affect the Performance and Stability of Slewing Bearings?
Preload is a critical factor that can significantly impact the performance and stability of slewing bearings. It involves applying a controlled axial force to the bearing components before assembly. Here’s how preload affects slewing bearings:
- Reduced Internal Clearance:
Applying preload reduces the internal clearance between the rolling elements and raceways. This minimizes play or clearance in the bearing, enhancing its rigidity and reducing the potential for rolling element skidding during operation.
- Improved Stiffness:
Preloaded slewing bearings exhibit higher stiffness due to the elimination of internal clearance. This improved stiffness is crucial in applications requiring precise positioning, such as robotics and high-precision machinery.
- Enhanced Load Distribution:
Preload improves the load distribution among rolling elements, minimizing stress concentrations and promoting uniform load sharing. This is especially important in applications with varying loads and forces.
- Reduced Vibrations:
By eliminating internal clearance and minimizing rolling element movements, preloaded bearings experience reduced vibrations during operation. This contributes to smoother and more stable equipment performance.
- Precise Positioning:
Preload ensures minimal movement within the bearing during rotational changes, making it suitable for applications where precise positioning and accurate motion control are essential.
- Resistance to External Loads:
Preloaded bearings are better equipped to handle external forces and shocks without significant deformation or misalignment, maintaining consistent performance even under varying conditions.
- Reduced Wear:
With reduced internal clearance and controlled movement, preloaded bearings experience less wear and fatigue. This extends their service life and reduces the frequency of maintenance.
- Limitations:
However, excessive preload can lead to increased friction, heat generation, and potential damage. It’s essential to apply the right amount of preload according to manufacturer recommendations and application requirements.
In summary, preload in slewing bearings enhances rigidity, load distribution, and stability, making them suitable for applications that demand precise movement and control. Properly applied preload ensures optimal performance and extends the operational life of the bearing.
Can you Explain the Differences Between Single-Row and Double-Row Slewing Bearings?
Single-row and double-row slewing bearings are two common configurations with distinct characteristics. Here are the key differences between them:
- Design:
A single-row slewing bearing consists of one row of rolling elements positioned between the inner and outer rings. In contrast, a double-row slewing bearing has two rows of rolling elements.
- Load-Carrying Capacity:
Double-row slewing bearings generally have a higher load-carrying capacity compared to single-row bearings. The presence of two rows of rolling elements enables them to handle heavier axial, radial, and moment loads.
- Stiffness:
Double-row bearings offer higher stiffness due to the additional row of rolling elements. This stiffness can be advantageous in applications where precise positioning and resistance to deflection are crucial.
- Compactness:
Single-row slewing bearings are typically more compact and have a smaller profile compared to double-row bearings. This compact design can be advantageous in applications with limited space.
- Cost:
Single-row slewing bearings are generally more cost-effective compared to double-row bearings. The increased complexity and higher load capacity of double-row bearings can result in higher manufacturing costs.
- Applications:
Single-row slewing bearings are suitable for applications with moderate loads and rotational requirements, where compactness is important. Examples include small cranes, excavators, and material handling equipment. Double-row slewing bearings are often used in larger and heavier machinery, such as construction equipment, wind turbines, and heavy-duty cranes.
- Performance Trade-offs:
While double-row bearings offer higher load capacity and stiffness, they may also introduce higher friction and slightly reduced rotational efficiency compared to single-row bearings due to the presence of additional rolling elements.
In summary, the choice between single-row and double-row slewing bearings depends on factors like load requirements, available space, and desired stiffness. Each configuration has its own advantages and trade-offs, allowing engineers to tailor their selection to the specific needs of the application.
editor by CX 2024-05-09