Product Description



We can provide manufacturing capabilities and services of regular bearings for you, or customized non-standard bearings as you required.

  — Dimensions
  — Material
  — Tolerance standard

  — Logo (Laser Marking)
  — Package Design


With over 40 years experience of the bearing manufacturing, we know how to make good bearings with less cost consistently and efficiently.

We use advanced CNC turning, grinding, and superfinishing machines to ensure high, stable, and accurate machining.  All of your goods, from the most economical category, to the highest rated category, will always be manufactured precisely to the standards you require.


Heat treatment is 1 of the crucial processes to ensure high performance of bearing materials. Compared with other manufacturers, we can produce higher quality bearings at smaller cost, with a more flexible and controllable production schedule, and in a shorter time

We have 6 heat treatment production lines.

Bearings are heated uniformly, with small deformation and little/no oxidized decarburization, which can make them have high hardness, high fatigue resistance, good wear resistance, dimensional stability, and excellent mechanical strength.


All our products are characterized by low noise, low friction and long life.  This is due to our attention to the roundness, waviness and surface roughness of bearing raceway.

Our products fully meets the requirements of national and international standards according to the testing result of roughness, roundness, hardness, vibration noise, vibration velocity.


1, Inner package
   Corrosion and Dust Proof PE plastic film  / bag packing + Tube packing, or Wrapping  tape for larger bearings.

2, Corrugated Individual Box
   Our attractive sales-helpful “3-JOYS” package, or as the design of your package.
3, Outer package
  Corrugated carton + Wooden pallet 


  · Constant temperature (20°C) and humidity (RH 52%) warehouse
  · Hundreds of models on hand, short delivery time.





 We are happy to send you free samples of our bearings for field   testing. All transportation costs will be paid by us.

 Please note: Depending on the model and value of samples,   this policy may not apply!

 Please contact our sales staff for details.



To facilitate your payment, we offer a variety of options! 



1, About the lead time.
This depends on several factors, like Is the production schedule tight? Is there a corresponding model in stock, and is there enough of this model in stock? How many pcs of that model would be ordered?
Simply speaking, based on a 20′ GP container load:

If the model your Preferred is Sufficient stock Lead Time
Regular models YES Within 7 days
Regular models NO Within 30 days
Non-regular model NO About 50 days

For accurate estimate, please contact with our sale stuff. Thanks.

2, Minimum order quantity. 

Even just ONE piece of bearing is ok for us.

3, If you don’t know which model is the right choice…

We would like to give you some advise if you like, according to the real situation and demand of your local market. Our purpose is to help you to get proper and right models for your customers, so that you would make a better sales and income finally.

4, Factory Inspection

We surely would welcome you or your representatives to come to our plants or working offices to take a good look and chat with our hardworking CZPT employees. Ask our sales stuff and she/he will arrange that for you.


Subject Symbol Description
Material of Housing N/A Cast Iron/ Steel
Stainless Steel
Press Steel Plate
Bearing Type Code UC Cylindrical bore, with set screws
UK Tapered bore (for adapter)
NA/UEL Cylindrical bore (with eccentric locking collar)
UE Cylindrical bore with eccentric locking collar (light duty type)
UB  Flat head at 1 end, with set screws (light duty type)
SB Cylindrical bore, with set screws (light duty type)
SA Cylindrical bore, with eccentric locking collar
SU Cylindrical bore, with set screws
Housing Type Code P Pillow block type
PA Tapered-base pillow block type
LP Light duty pillow block type
IP Thick section pillow block type
HP Center height pillow block type
F Square-flanged type
FA Adjustable rhombic-flanged type
FB Three-bolt flange type
FL Rhombic-flanged type
FC Round-flanged type with spigot joint
FS Square-flanged type
C Cartridge type
T Take-up type
SP Pillow block type (stainless-type)
ST Take-up type (stainless-series)
Sealing Type RS Rubber seal on 1 side.
2RS Rubber seals on both sides.
RZ Rubber seal on 1 side. (non-contact)
2RZ Rubber seal on both sides(non-contact)
Z Metal shield on 1 side.
2Z Metal shields on both sides.
RSZ Rubber seal on 1 side, metal shields on other side
RZZ Rubber seal on 1 side, metal shields on other side
L2 Double-lip seal
L3 Triple-lip seal


This tech sheet may not contain all or every piece of information you want to know. Please contact our sales staff to obtain or compare the information.
                                                                                                                                                             In metric: mm

Bearing No. Shaft Dia Dimensions(mm) Weight 
d D Bi Be N M G Ds
mm mm
UC202 15 40 27.4 14 11.5 15.9 4.5 M5×0.8 0.14
UC203 17 40 27.4 14 11.5 15.9 4.5 M5×0.8 0.13
UC204 20 47 31 17 12.3 18.7 5 M6×1.0 0.18
UC205 25 52 34.1 17 14.3 19.8 5 M6×1.0 0.22
UC206 30 62 38.1 19 15.9 22.2 5 M6×1.0 0.34
UC207 35 72 42.9 20 17.5 25.4 7 M8×1.0 0.52
UC208 40 80 49.2 21 19 30.2 8 M8×1.0 0.68
UC209 45 85 49.2 22 19 30.2 8 M8×1.0 0.78
UC210 50 90 51.6 22 19 32.6 10 M10×1.25 0.85
UC211 55 100 55.6 25 22.2 33.4 10 M10×1.25 1.22
UC212 60 110 65.1 27 25.4 39.7 10 M10×1.25 1.65
UC213 65 120 65.1 29 25.4 39.7 10 M10×1.25 1.96
UC214 70 125 74.6 30 30.2 44.4 12 M12×1.5 2.06
UC215 75 130 77.8 30 33.3 44.5 12 M12×1.5 2.3
UC216 80 140 82.6 33 33.3 49.3 12 M12×1.5 2.79
UC217 85 150 85.7 35 34.1 51.6 12 M12×1.5 3.59
UC218 90 160 96 37 39.7 56.3 12 M12×1.5 4.56
UC305 25 62 38 20 15 23 6    M6×1.0 0.35
UC306 30 72 43 23 17 26 6 M8×1.0 0.56
UC307 35 80 48 25 19 29 8 M8×1.0 0.71
UC308 40 90 52 27 19 33 10 M10×1.25 1
UC309 45 100 57 29 22 35 10 M10×1.25 1.36
UC310 50 110 61 32 22 39 12 M12×1.50 1.65
UC311 55 120 66 34 25 41 12 M12×1.50 2.08
UC312 60 130 71 36 26 45 12 M12×1.50 2.6
UC313 65 140 75 38 30 45 12 M12×1.50 3.24
UC314 70 150 78 40 33 45 12 M12×1.50 3.91
UC315 75 160 82 42 32 50 14 M14×1.50 4.7
UC316 80 170 86 44 34 52 16 M16×1.50 5.06
UC317 85 180 96 46 40 56 16 M16×1.50 6.9
UC318 90 190 96 48 40 56 16 M16×1.50 8.03
UC319 95 200 103 50 41 62 16 M16×1.50 8.91
UC320 100 215 108 54 42 66 18 M18×1.50 11.2


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Aligning: Non-Aligning Bearing
Separated: Unseparated
Feature: Corrosion Resistant, High Speed
Rows Number: Single
Raceway: Deep Groove Raceway
Material: Bearing Steel
US$ 0/Piece
1 Piece(Min.Order)

Request Sample



Customized Request

steel ball bearing

How do innovations and advancements in steel ball bearing technology impact their use?

The continuous innovations and advancements in steel ball bearing technology have a significant impact on their use across various industries. These advancements drive improvements in performance, efficiency, reliability, and versatility. Let’s explore how innovations in steel ball bearing technology impact their use:

1. Enhanced Performance:

Advancements in steel ball bearing technology contribute to enhanced performance in terms of load capacity, speed capability, and overall efficiency. Innovative bearing designs, such as optimized internal geometries, improved ball and raceway surface finishes, or advanced cage materials, help reduce friction, minimize energy losses, and increase the bearing’s ability to withstand heavy loads or high speeds. This enhanced performance allows for the development of more efficient and higher-performing industrial systems.

2. Extended Service Life:

Innovations in steel ball bearing technology result in increased durability and extended service life. Improved materials, heat treatment processes, and surface coatings enhance the bearing’s resistance to wear, fatigue, and corrosion. Additionally, advancements in lubrication techniques or the use of advanced lubricants with better properties, such as higher temperature stability or improved anti-wear characteristics, contribute to prolonged bearing life. The extended service life of steel ball bearings reduces maintenance requirements, downtime, and replacement costs in various industrial applications.

3. Expanded Operating Range:

Advancements in steel ball bearing technology expand their operating range, allowing them to perform reliably in a wider range of conditions. For example, specialized bearing designs and materials can withstand extreme temperatures, cryogenic environments, or vacuum conditions. Bearings with enhanced resistance to contaminants, such as dust, dirt, or water, are better suited for applications in harsh or dirty environments. These expanded operating capabilities enable steel ball bearings to be utilized in diverse industries and challenging operating conditions.

4. Miniaturization and Precision:

Innovations in steel ball bearing technology have facilitated the miniaturization of bearings and increased their precision. Miniature bearings with smaller dimensions and precise tolerances are crucial in industries such as microelectronics, medical devices, or aerospace, where space constraints or high precision requirements exist. Advancements in manufacturing techniques, such as precision machining, grinding, or superfinishing, enable the production of steel ball bearings with tighter tolerances, smoother surfaces, and improved dimensional accuracy.

5. Noise and Vibration Reduction:

Advancements in steel ball bearing technology contribute to reduced noise and vibration levels, enhancing the comfort, safety, and performance of industrial systems. Innovative designs, materials, or cage configurations help dampen vibrations, minimize friction-induced noise, or improve the balance of rotating components. Low-noise and low-vibration bearings find applications in industries such as automotive, aerospace, or precision machinery, where quiet operation and smooth performance are critical.

6. Integration with Sensor Technology:

Recent advancements in steel ball bearing technology enable the integration of sensor technology within the bearings themselves. Sensor-enabled bearings can provide real-time monitoring of vital parameters such as temperature, speed, or load. This allows for proactive maintenance, condition monitoring, and predictive analytics, leading to improved system reliability, reduced downtime, and optimized maintenance schedules.

7. Sustainability and Environmental Considerations:

Advancements in steel ball bearing technology also focus on sustainability and environmental considerations. Manufacturers are developing bearing solutions with reduced friction, lower energy consumption, and improved recyclability. Additionally, advancements in lubrication techniques, such as the use of environmentally friendly lubricants or dry lubrication systems, help minimize environmental impact. These innovations align with the growing emphasis on sustainability and contribute to reducing the carbon footprint of industrial operations.

Overall, innovations and advancements in steel ball bearing technology drive improvements in performance, durability, versatility, and environmental sustainability. These advancements expand the range of applications, enhance system efficiency, reduce maintenance requirements, and contribute to the overall progress of various industries.

steel ball bearing

Are there specific types of steel ball bearings, such as deep groove or angular contact bearings?

Yes, there are specific types of steel ball bearings designed to suit different applications and operating conditions. Two common types of steel ball bearings are deep groove bearings and angular contact bearings. Let’s explore each type in detail:

1. Deep Groove Bearings:

Deep groove bearings, also known as radial bearings, are the most widely used type of ball bearings. They have a deep groove design that allows them to carry both radial and axial loads in a wide range of applications. The key features of deep groove bearings include:

  • Geometry: Deep groove bearings have a raceway with a larger inner diameter than the outer diameter, creating a deep groove between the raceways. This design enables the bearings to accommodate radial loads, axial loads in both directions, and combined loads.
  • Load Distribution: Deep groove bearings distribute the load evenly across a large number of balls, reducing stress concentrations and improving load-carrying capacity.
  • Versatility: Deep groove bearings are suitable for a wide range of applications, including electric motors, pumps, gearboxes, conveyors, and household appliances.

2. Angular Contact Bearings:

Angular contact bearings are designed to handle primarily axial loads in combination with radial loads. These bearings have raceways that are offset from each other, allowing them to support high axial loads in one direction while still accommodating radial loads. The main characteristics of angular contact bearings include:

  • Contact Angle: Angular contact bearings have a defined contact angle between the balls and the raceways. This angle determines the axial load-carrying capacity and the ability to handle thrust loads. Common contact angles include 15°, 25°, and 30°, with smaller angles providing higher axial load capacity.
  • High Precision: Angular contact bearings are often used in applications that require high precision and accuracy, such as machine tools, robotics, and precision equipment.
  • Single-Row and Double-Row: Angular contact bearings are available in both single-row and double-row configurations. Double-row angular contact bearings have two rows of balls and can handle higher radial loads while maintaining their axial load-carrying capacity.

Aside from deep groove and angular contact bearings, there are many other specialized types of steel ball bearings designed for specific applications. Some examples include thrust bearings for handling high axial loads, self-aligning bearings for applications with misalignment, and miniature bearings for compact and precise mechanisms.

In summary, steel ball bearings encompass various types tailored to different application requirements. Deep groove bearings are versatile and widely used for both radial and axial loads, while angular contact bearings excel at handling primarily axial loads combined with radial loads. By selecting the appropriate type of steel ball bearing, engineers can optimize the performance, reliability, and longevity of machinery and mechanical systems.

steel ball bearing

How do steel ball bearings contribute to reduced friction and smooth operation in machinery?

Steel ball bearings play a critical role in reducing friction and ensuring smooth operation in various machinery and mechanical systems. Let’s explore how steel ball bearings achieve these benefits:

1. Rolling Motion: Steel ball bearings operate on the principle of rolling motion. The small spherical balls within the bearing roll between the inner and outer raceways, rather than sliding against each other. This rolling motion significantly reduces friction compared to sliding friction that occurs in plain bearings or bushings. As a result, steel ball bearings minimize energy losses due to friction and enable more efficient operation of machinery.

2. Point Contact: Steel ball bearings feature point contact between the balls and the raceways. This means that only a small area of the ball is in contact with the raceway at any given time. Point contact reduces the contact surface area and, consequently, the frictional resistance. The reduced friction allows the bearing to rotate more freely and with minimal energy loss.

3. Lubrication: Proper lubrication is crucial for the smooth operation of steel ball bearings. Lubricants such as grease or oil are used to reduce friction and wear between the balls and the raceways. Lubrication forms a thin film between the contacting surfaces, providing a barrier that prevents direct metal-to-metal contact. This lubricating film further reduces friction and dissipates heat, improving the overall performance and longevity of the bearing.

4. Precision Manufacturing: Steel ball bearings are manufactured with high precision and tight tolerances. The dimensions, roundness, and surface finish of the balls and raceways are carefully controlled during the manufacturing process. This precision ensures that the balls roll smoothly and with minimal resistance within the bearing. The precise fit between the balls and the raceways contributes to reduced friction and promotes smooth operation.

5. Material Properties: Steel ball bearings are typically made from high-quality steel alloys that exhibit excellent mechanical properties. The steel used in ball bearings is hardened and heat-treated to enhance its strength, durability, and resistance to wear. These material properties allow the bearings to withstand high loads and provide reliable performance over extended periods. The smooth and hard surface of the steel balls also reduces friction and wear between the balls and the raceways.

6. Cage or Retainer: In many steel ball bearings, a cage or retainer is used to separate and maintain proper spacing between the balls. The cage prevents the balls from touching or rubbing against each other, ensuring smooth rolling motion. It also helps to distribute the load evenly among the balls, reducing stress concentrations and minimizing frictional resistance.

7. Noise and Vibration Reduction: Steel ball bearings contribute to the reduction of noise and vibration in machinery. The rolling motion of the balls and the precise fit between the balls and raceways minimize the occurrence of undesirable vibrations and noise generated by friction. This is particularly important in applications where quiet operation is essential, such as in precision machinery or automotive components.

In summary, steel ball bearings reduce friction and enable smooth operation in machinery through rolling motion, point contact, proper lubrication, precision manufacturing, high-quality materials, the use of cages or retainers, and noise/vibration reduction. These factors combined make steel ball bearings essential components in a wide range of applications, contributing to improved efficiency, durability, and performance of machinery and mechanical systems.

China supplier Agricultural Machinery Set Crews Flange Units Stainless Steel Insert Ball Bearings Housing Ucf202 203 204 205 206 207 208 209 210 211 212 213 Price   bearing assemblyChina supplier Agricultural Machinery Set Crews Flange Units Stainless Steel Insert Ball Bearings Housing Ucf202 203 204 205 206 207 208 209 210 211 212 213 Price   bearing assembly
editor by CX 2024-03-28

Steel Ball Bearings

As one of the leading steel ball bearings manufacturers, suppliers, and exporters of mechanical products, We offer steel ball bearings and many other products.

Please get in touch with us for details.

Manufacturer supplier exporter of steel ball bearings.

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