Product Description
Slewing ring bearing is also called slewing ring, slewing bearing, turntable bearing, and rotary bearing.Â
Slewing ring bearing is a bearing that CZPT to bear axial load, radial load and overturning torque. Under normal circumstances, slewing ring bearings have their own mounting holes, lubricant holes and seal holes, to meet the different needs of the various host working under the various conditions;Â
On the other hand, slewing ring bearing itself has characteristics of compact structure, CZPT rotating convenient, easy to install and maintaining easily.Â
1.Gear Heat Treatment
2. Structure
2.1 Slewing ring bearings have different types as per different structures, here below is what we offering now:Â
Single row ball slewing ring bearingsÂ
Double row ball slewing ring bearings
Crossed roller slewing ring bearingsÂ
Three row roller slewing ring bearingsÂ
Flange slewing ring bearings
2.2 The above slewing ring bearings can also be divided into 3 different types as per different transmissions:
Slewing ring bearings with no gear
Slewing ring bearings with external gear
Slewing ring bearings with internal gear
No. | Basic Type | Boundary Size | Bolt hole diameter | Structural Size | Gear Data | Ext Gear Data | Int Gear Data | ||||||||||||||
None-gear | Ext Gear | Int Gear | D | d | H | D1 | D2 | dn1 dn2 |
dm1 dm2 |
L | n | n1 | H1 | h | b | m | de | z | de | z | |
mm | mm | mm | |||||||||||||||||||
1 | 130.25.500 | 131.25.500 | 133.25.500 | 634 | 366 | 148 | 598 | 402 | 18 | M16 | 32 | 24 | 4 | 138 | 32 | 80 | 5 | 664 | 130 | 337 | 68 |
132.25.500 | 134.25.500 | 6 | 664.8 | 108 | 338.4 | 57 | |||||||||||||||
2 | 130.25.560 | 131.25.560 | 133.25.560 | 694 | 426 | 658 | 462 | 5 | 724 | 142 | 397 | 80 | |||||||||
132.25.560 | 134.25.560 | 6 | 724.8 | 118 | 398.4 | 67 | |||||||||||||||
3 | 130.25.630 | 131.25.630 | 133.25.630 | 764 | 496 | 728 | 532 | 28 | 808.8 | 132 | 458.4 | 77 | |||||||||
132.25.630 | 134.25.630 | 8 | 806.4 | 98 | 459.2 | 58 | |||||||||||||||
4 | 130.25.710 | 131.25.710 | 133.25.710 | 844 | 576 | 808 | 612 | 6 | 886.8 | 145 | 536.4 | 90 | |||||||||
132.25.710 | 134.25.710 | 8 | 886.4 | 108 | 539.2 | 68 | |||||||||||||||
5 | 130.32.800 | 131.32.800 | 133.32.800 | 964 | 636 | 182 | 920 | 680 | 22 | M20 | 40 | 36 | 172 | 40 | 120 | 1006.4 | 123 | 595.2 | 75 | ||
132.32.800 | 134.32.800 | 10 | 1008 | 98 | 594 | 60 | |||||||||||||||
6 | 130.32.900 | 131.32.900 | 133.32.900 | 106 | 736 | 1571 | 780 | 8 | 1102.4 | 135 | 691.2 | 87 | |||||||||
132.32.900 | 134.32.900 | 10 | 1108 | 108 | 694 | 70 | |||||||||||||||
7 | 130.32.1000 | 131.32.1000 | 133.32.1000 | 1164 | 836 | 1120 | 880 | 40 | 5 | 1218 | 119 | 784 | 79 | ||||||||
132.32.1000 | 134.32.1000 | 12 | 1221.6 | 99 | 784.8 | 66 | |||||||||||||||
8 | 130.32.1120 | 131.32.1120 | 133.32.1120 | 1284 | 956 | 1240 | 1000 | 10 | 1338 | 131 | 904 | 91 | |||||||||
132.32.1120 | 134.32.1120 | 12 | 1341.6 | 109 | 904.8 | 76 | |||||||||||||||
9 | 130.40.1250 | 134.40.1250 | 133.40.1250 | 1445 | 1055 | 220 | 1393 | 1107 | 26 | M24 | 48 | 45 | 210 | 50 | 150 | 1509.6 | 123 | 988.8 | 83 | ||
132.40.1250 | 134.40.1250 | 14 | 1509.2 | 105 | 985.6 | 71 | |||||||||||||||
10 | 130.40.1400 | 131.40.1400 | 133.40.1400 | 1595 | 1205 | 1543 | 1257 | 12 | 1665.6 | 136 | 1144.8 | 96 | |||||||||
132.40.1400 | 134.40.1400 | 14 | 1663.2 | 116 | 1139.6 | 82 | |||||||||||||||
11 | 130.40.1600 | 131.40.1600 | 133.40.1600 | 1795 | 1405 | 1743 | 1457 | 48 | 6 | 14 | 1873.2 | 131 | 1335.6 | 96 | |||||||
132.40.1600 | 134.40.1600 | 16 | 1868.8 | 114 | 1334.4 | 84 | |||||||||||||||
12 | 130.40.1800 | 131.40.1800 | 133.40.1800 | 1995 | 1605 | 1943 | 1657 | 14 | 2069.2 | 145 | 1531.6 | 110 | |||||||||
132.40.1800 | 134.40.1800 | 16 | 2076.8 | 127 | 1526.4 | 96 | |||||||||||||||
13 | 130.45.2000 | 131.45.2000 | 133.45.2000 | 2221 | 1779 | 231 | 2155 | 1845 | 33 | M30 | 60 | 60 | 219 | 54 | 160 | 2300.8 | 141 | 1702.4 | 107 | ||
132.45.2000 | 134.45.2000 | 18 | 2300.4 | 125 | 1699.2 | 95 | |||||||||||||||
14 | 130.45.2240 | 131.45.2240 | 133.45.2240 | 2461 | 2019 | 2395 | 2085 | 16 | 2556.8 | 157 | 1926.4 | 121 | |||||||||
132.45.2240 | 134.45.2240 | 18 | 2552.4 | 139 | 1933.2 | 108 | |||||||||||||||
15 | 130.45.2500 | 131.45.2500 | 133.45.2500 | 2721 | 2279 | 2655 | 2345 | 72 | 8 | 2822.4 | 154 | 2185.2 | 122 | ||||||||
132.45.2500 | 134.45.2500 | 20 | 2816 | 138 | 2188 | 110 | |||||||||||||||
16 | 130.45.2800 | 131.45.2800 | 133.45.2800 | 3571 | 2579 | 2955 | 2645 | 18 | 3110.4 | 170 | 2491.2 | 139 | |||||||||
132.45.2800 | 133.45.2800 | 20 | 3116 | 153 | 2488 | 125 | |||||||||||||||
17 | 130.50.3150 | 131.50.3150 | 133.50.3150 | 3432 | 2868 | 270 | 3342 | 2958 | 45 | M42 | 84 | 258 | 65 | 180 | 3536 | 174 | 2768 | 139 | |||
132.50.3150 | 134.50.3150 | 22 | 3537.6 | 158 | 2758.8 | 126 | |||||||||||||||
18 | 130.50.3550 | 131.50.3550 | 133.50.3550 | 3832 | 3268 | 3742 | 3358 | 20 | 3936 | 194 | 3168 | 159 | |||||||||
132.50.3550 | 134.50.3550 | 22 | 3933.6 | 176 | 3154.8 | 144 | |||||||||||||||
19 | 130.50.4000 | 131.50.4000 | 133.50.4000 | 4282 | 3718 | 4192 | 3808 | 80 | 4395.6 | 197 | 3116.8 | 165 | |||||||||
132.50.4000 | 134.50.4000 | 25 | 4395 | 173 | 3610 | 145 | |||||||||||||||
20 | 130.50.4500 | 131.50.4500 | 133.50.4500 | 4782 | 4218 | 4692 | 4308 | 22 | 4901.6 | 220 | 4122.8 | 188 | |||||||||
132.50.4500 | 134.50.4500 | 25 | 4895 | 193 | 4110 | 165 Â |
3. Features:Â
Slewing ring bearings have more features: compact structure, reliable guide, simple installation, and easily maintenance
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4. Application:Â
Slewing ring bearings can be widely used in lifting & transport machinery, mining machinery, construction machinery, port hoisting machinery, port oil transfer equipment, onshore and offshore crane, excavator, concrete machine, paper machine, plastic and rubber machine, weave machine, steel plant, electronic power plant, wind power generator, other construction and industry machines or equipments and other large rotary device
Single row ball slewing ring bearing:
1.Slewing bearing is also called slewing ring, slewing ring bearing, turntable bearing, and rotary bearing.Â
The single row ball slewing ring bearing is composed of 2 seat-rings. The balls contact with the circular race at 4 points, via which the axial force, radial force and resultant moment may be born simultaneously.
2.2. Structure
Slewing ring bearings have different types as per different structures, here below is what we offering now:
Single row ball slewing bearing has 3 different types:
Single row ball slewing bearing with no gearÂ
Single row ball slewing bearing with external gearÂ
Single row ball slewing bearing with internal gearÂ
Single row ball slewing ring bearing
1.Slewing bearing is also called slewing ring, slewing ring bearing, turntable bearing, and rotary bearing.Â
The single row ball slewing ring bearing is composed of 2 seat-rings. The balls contact with the circular race at 4 points, via which the axial force, radial force and resultant moment may be born simultaneously.
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2. Structure
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Slewing ring bearings have different types as per different structures, here below is what we offering now:
Single row ball slewing bearing has 3 different types:
Single row ball slewing bearing with no gearÂ
Single row ball slewing bearing with external gearÂ
Single row ball slewing bearing with internal gearÂ
3. Features
Single row ball slewing ring bearings have following features:
Compact in structure and light in weight.
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4. Application:Â
Single row ball slewing ring bearings are widely used in slewing conveyers, welding arm and positioned, medium duty cranes, excavators and other engineering machines
Double row ball slewing ring bearing:
1.Slewing bearing is also called slewing ring, slewing ring bearing, turntable bearing, and rotary bearing.Â
The double row ball slewing bearing has 3 seat-rings. The steel balls and the retainers may be directly arranged into the upper and lower racers. Two rows of steel balls with different diameters are fitted according to the force. Such open type fitting is extraordinary convenient, the loading angels at upper and lower races are 90°which can carry both of the axial force and capsizing moment. When the radial force is larger than 1/10 of the axial force, the races should be newly designed.
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2. Structure:
Double row ball slewing bearing has 3 different types:
Double row ball slewing bearing with no gear
Double row ball slewing bearing with external gearÂ
Double row ball slewing bearing with internal gearÂ
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3. Features:
Double row ball slewing ring bearings have following features:
Larger dimension of axial and radial and compact structure.
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4. Application:
Double row ball slewing ring bearings are widely used in Tower cranes which require working radius over medium range, auto crane and loading (unloading) machinery.
 Double row ball slewing ring bearing:
1.Slewing bearing is also called slewing ring, slewing ring bearing, turntable bearing, and rotary bearing.Â
The double row ball slewing bearing has 3 seat-rings. The steel balls and the retainers may be directly arranged into the upper and lower racers. Two rows of steel balls with different diameters are fitted according to the force. Such open type fitting is extraordinary convenient, the loading angels at upper and lower races are 90°which can carry both of the axial force and capsizing moment. When the radial force is larger than 1/10 of the axial force, the races should be newly designed.
Â
2. Structure:
Double row ball slewing bearing has 3 different types:
Double row ball slewing bearing with no gear
Double row ball slewing bearing with external gearÂ
Double row ball slewing bearing with internal gearÂ
3. Features:
Double row ball slewing ring bearings have following features:
Larger dimension of axial and radial and compact structure.
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4. Application:
Double row ball slewing ring bearings are widely used in Tower cranes which require working radius over medium range, auto crane and loading (unloading) machinery.
Crossed roller slewing ring bearing
1.Slewing bearing is also called slewing ring, slewing ring bearing, turntable bearing, and rotary bearing.Â
With the cross roller Ring, cylindrical rollers are arranged crosswise, with each roller perpendicular to the adjacent roller, in a 90° groove, separated from each other by a spacer retainer.  This design allows just 1 bearing to receive loads in all directions including, radial, axial and moment loads. Since the Cross-Roller Ring achieves high rigidity despite the minimum possible dimensions of the inner and outer rings, it is optimal for applications such as joints and swiveling units of industrial robots, swiveling tables of machining centers, rotary units of manipulators, precision rotary tables, medical equipment, measuring instruments and IC manufacturing machines.
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2. Structure:
Cross roller slewing bearing has 3 different types:
Cross roller ball slewing bearing with no gearÂ
Cross roller ball slewing bearing with external gearÂ
Cross roller ball slewing bearing with internal gearÂ
3. Features
Cross roller slewing ring bearings have following features:
1. High precision: cross roller bearings can be made high precision bearings, at P4, P2.
2. High rigidity: These series roller bearings are with preload.
3. High load capacity: This series roller bearing can support axial load, radial load, and tilting load.
4. Small volume: this series roller bearing can save space for the machine.
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4. ApplicationÂ
Cross roller slewing rings are widely applied in the precision rotary table, rotary joint of manipulator, medical equipment, and measuring instrument etc
Triple row roller slewing ring bearingÂ
1.Slewing bearing is also called slewing ring, slewing ring bearing, turntable bearing, and rotary bearing.Â
Three row roller slewing ring bearing has 3 seat-rings, which separate the upper, lower and radial raceway, via which the load of each row of the rollers may be specified. Thus it can carry different load simultaneously and its load capacity is the largest 1 of the 4 types
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2. Structure:
Triple row roller slewing bearing has 3 different types:
Triple row roller slewing bearing with no gear
Triple row roller slewing bearing with external gearÂ
Triple row roller slewing bearing with internal gearÂ
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3. Features  Â
Triple row roller slewing ring bearings have following features:
Larger axial and radial dimension, compact structure
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4. Application
Triple row roller slewing rings are widely used in heavy-duty machines which require large working radius, such as bucket-wheel excavators, wheeled cranes, ship cranes, ladle turret, auto cranes etc.
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Flange Slewing Bearing
1.Slewing bearing is also called slewing ring, slewing ring bearing, turntable bearing, and rotary bearing.Â
Flange slewing bearing is a special slewing ring bearing, it can have 1 flange in the outer ring, or 1 flange in the inner ring, even it can have 1 flange in both inner ring and outer ring.
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2. Structure:
Flange slewing bearing has 3 different types:
Flange slewing bearing with no gear
Flange slewing bearing with external gearÂ
Flange slewing bearing with internal gearÂ
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3. Features  Â
Flange slewing bearings have following features:
Compact structure and easily installment.
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4. Application
Flange slewing bearings are widely used in tow truck, and other applications are the same as slewing bearings, such as lifting & transport machinery, mining machinery, construction machinery, excavator, concrete machine, paper machine, plastic and rubber machine and steel plant.
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Excavator Slewing Bearing
Excavator slewing bearing is a special slewing ring bearing as per its applications. And it is a very important part for excavators, we can supply excavator slewing bearings for both second-hand excavators for maintenance and new excavators.
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2. Structure:
Excavator slewing bearing are usually made as per single row ball slewing bearing structure, and most of them are internal gear types, but some are external gear types.
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3. Features  Â
Excavator slewing bearings have familiar features as single row ball slewing ring bearings.
Compact structure, light weight and easily installment.
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4. Application
Excavator slewing bearings are widely used for all brands of excavators, such as Hitachi, Kobelco, Sumitomo, Doosan, Hyundai, Samsung, Daewoo, Kato, CZPT and so on.
The suitable temperature and working environment for slewing bearing
The slewing bearing produced by our company can work normally at -300C.~+ 700C. If users need to adapt to lower or higher temperature support, our engineering technicians can design for you. If the slewing bearing are used in particularly hostile environment, such as Marine c1imate, dust or CZPT particles (dust, cement, coal powder) etc. Special sealing rings, protective devices, and proper oil paths must be selected. Therefore, we hope users to do the daily maintenance work to make your slewing bearing function normally
The suitable temperature and working environment for slewing bearing
The slewing bearing produced by our company can work normally at -300C.~+ 700C. If users need to adapt to lower or higher temperature support, our engineering technicians can design for you. If the slewing bearing are used in particularly hostile environment, such as Marine c1imate, dust or CZPT particles (dust, cement, coal powder) etc. Special sealing rings, protective devices, and proper oil paths must be selected. Therefore, we hope users to do the daily maintenance work to make your slewing bearing function normally
Installation of slewing bearing
1.Handling and transportation .The slewing bearing must be handled carefully
.Transportation and storage of slewing bearing should be held horizontally and stored in a dry room
.For hoisting lift bolt is suitable and please move it horizontally , do not hit anything, especially the direction collision
.The slewing bearing surface is covered with antitrust agent, whose rust proof life is usually 6 months For those whose storage
 life of more than 6 months (such as accessories) should take the antitrust package or other storage measures again
2.Installing support requirements .Generally, install matching support adopts tubular structure , the cylinder’s wall should be better
  aligned at the center of the raceway
Packing &ShippingÂ
Welcome to contact us freely to get product information &Newest Price and fast delivery 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: | Sealed On Both Sides |
Rolling-Element Number: | Single-Row |
Roller Type: | Spherical Raceway |
Material: | Bearing Steel |
Customization: |
Available
| Customized Request |
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What are the Common Signs of Wear or Damage in Ball Bearings that Indicate the Need for Replacement?
Ball bearings are subjected to wear and stress during operation, and over time, they may exhibit signs of damage or deterioration that warrant replacement. Recognizing these signs is crucial to prevent catastrophic failure and ensure safe and reliable operation. Here are the common signs of wear or damage in ball bearings:
- Unusual Noise:
If you hear unusual grinding, clicking, or rumbling noises coming from the bearing during operation, it may indicate worn-out or damaged components. Unusual noise suggests that the bearing is no longer operating smoothly.
- Vibration:
Excessive vibration in the machinery can be a sign of bearing wear. Vibrations can result from uneven wear, misalignment, or damaged components within the bearing.
- Increased Temperature:
Higher operating temperatures than usual may indicate increased friction due to inadequate lubrication, wear, or other issues. Monitoring the bearing’s temperature can help identify potential problems.
- Irregular Movement:
If you notice irregular movement, jerking, or sticking during rotation, it could be a sign that the bearing is no longer operating smoothly. This may be due to damaged rolling elements or raceways.
- Reduced Performance:
If the machinery’s performance has decreased, it may be due to a compromised bearing. Reduced efficiency, increased energy consumption, or a decline in overall performance could be indicators of bearing wear.
- Visible Wear or Damage:
Inspect the bearing for visible signs of wear, such as pitting, scoring, or discoloration on the rolling elements or raceways. Severe wear or damage is a clear indication that the bearing needs replacement.
- Leakage or Contamination:
If there is evidence of lubricant leakage, contamination, or the presence of foreign particles around the bearing, it suggests that the seal or shield may be compromised, leading to potential damage.
- Looseness or Excessive Play:
If you can feel excessive play or looseness when manually moving the bearing, it could indicate worn-out components or misalignment.
- Reduced Lifespan:
If the bearing’s expected lifespan is significantly shorter than usual, it may be due to inadequate lubrication, excessive loads, or improper installation, leading to accelerated wear.
- Frequent Failures:
If the bearing is consistently failing despite regular maintenance and proper use, it could indicate a chronic issue that requires addressing, such as inadequate lubrication or misalignment.
It’s important to conduct regular inspections, monitor performance, and address any signs of wear or damage promptly. Replacing worn or damaged ball bearings in a timely manner can prevent further damage to machinery, reduce downtime, and ensure safe and efficient operation.
How do Miniature Ball Bearings Differ from Standard-sized Ones, and Where are They Commonly Used?
Miniature ball bearings, as the name suggests, are smaller in size compared to standard-sized ball bearings. They have distinct characteristics and are designed to meet the unique requirements of applications that demand compactness, precision, and efficient rotation in confined spaces. Here’s how miniature ball bearings differ from standard-sized ones and where they are commonly used:
- Size:
The most noticeable difference is their size. Miniature ball bearings typically have outer diameters ranging from a few millimeters to around 30 millimeters, while standard-sized ball bearings have larger dimensions suitable for heavier loads and higher speeds.
- Load Capacity:
Due to their smaller size, miniature ball bearings have lower load-carrying capacities compared to standard-sized bearings. They are designed for light to moderate loads and are often used in applications where precision and compactness are prioritized over heavy load support.
- Precision:
Miniature ball bearings are known for their high precision and accuracy. They are manufactured to tighter tolerances, making them suitable for applications requiring precise motion control and low levels of vibration.
- Speed:
Miniature ball bearings can achieve higher speeds than standard-sized bearings due to their smaller size and lower mass. This makes them ideal for applications involving high-speed rotation.
- Friction and Efficiency:
Miniature ball bearings generally have lower friction due to their smaller contact area. This contributes to higher efficiency and reduced heat generation in applications that require smooth and efficient motion.
- Applications:
Miniature ball bearings find applications in various industries and sectors:
- Electronics and Consumer Devices:
They are used in small motors, computer disk drives, printers, and miniature fans, where space is limited but precise motion is essential.
- Medical and Dental Equipment:
Miniature bearings are used in medical devices such as surgical instruments, dental handpieces, and diagnostic equipment due to their precision and compactness.
- Robotics and Automation:
Miniature ball bearings are integral to robotic arms, miniature conveyors, and automation systems, enabling precise movement in confined spaces.
- Aerospace and Defense:
They are used in applications like UAVs (drones), aerospace actuators, and satellite components where size and weight constraints are critical.
- Optics and Instrumentation:
Miniature bearings play a role in optical instruments, cameras, and measuring devices, providing smooth rotation and accurate positioning.
Overall, miniature ball bearings are specialized components designed for applications where space, precision, and efficient rotation are paramount. Their compactness and high precision make them crucial in various industries requiring reliable motion control in limited spaces.
How does Lubrication Impact the Performance and Lifespan of Ball Bearings?
Lubrication plays a critical role in the performance and lifespan of ball bearings. Proper lubrication ensures smooth operation, reduces friction, minimizes wear, and prevents premature failure. Here’s how lubrication impacts ball bearings:
- Friction Reduction:
Lubrication creates a thin film between the rolling elements (balls) and the raceways of the bearing. This film reduces friction by separating the surfaces and preventing direct metal-to-metal contact. Reduced friction results in lower energy consumption, heat generation, and wear.
- Wear Prevention:
Lubricants create a protective barrier that prevents wear and damage to the bearing’s components. Without proper lubrication, the repeated rolling and sliding of the balls against the raceways would lead to accelerated wear, surface pitting, and eventual failure.
- Heat Dissipation:
Lubricants help dissipate heat generated during operation. The rolling elements and raceways can generate heat due to friction. Adequate lubrication carries away this heat, preventing overheating and maintaining stable operating temperatures.
- Corrosion Resistance:
Lubrication prevents moisture and contaminants from coming into direct contact with the bearing’s surfaces. This helps protect the bearing against corrosion, rust, and the formation of debris that can compromise its performance and longevity.
- Noise Reduction:
Lubricated ball bearings operate quietly because the lubricant cushions and dampens vibrations caused by the rolling motion. This noise reduction is crucial in applications where noise levels need to be minimized.
- Seal Protection:
Lubricants help maintain the effectiveness of seals or shields that protect the bearing from contaminants. They create a barrier that prevents particles from entering the bearing and causing damage.
- Improved Efficiency:
Properly lubricated ball bearings operate with reduced friction, leading to improved overall efficiency. This is especially important in applications where energy efficiency is a priority.
- Lifespan Extension:
Effective lubrication significantly extends the lifespan of ball bearings. Bearings that are properly lubricated experience less wear, reduced fatigue, and a lower likelihood of premature failure.
- Selection of Lubricant:
Choosing the right lubricant is essential. Factors such as speed, temperature, load, and environmental conditions influence the choice of lubricant type and viscosity. Some common lubricant options include grease and oil-based lubricants.
- Regular Maintenance:
Regular lubrication maintenance is crucial to ensure optimal bearing performance. Bearings should be inspected and relubricated according to manufacturer recommendations and based on the application’s operating conditions.
In summary, proper lubrication is essential for the optimal performance, longevity, and reliability of ball bearings. It reduces friction, prevents wear, dissipates heat, protects against corrosion, and contributes to smooth and efficient operation in various industrial and mechanical applications.
editor by CX 2024-05-06