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
Sealing & Sealing type Z Metal shield on 1 side.
ZZ Metal shields on both sides.
RS Rubber seal on 1 side.
2RS Rubber seals on both sides.
ZNR Shield on 1 side, snap ring groove in the outer ring, with snap ring on the opposite side of the shield
2ZNR Shield on both sides, snap ring groove in the outer ring, with snap ring
ZNBR Shield on 1 side, snap ring groove in the outer ring, with snap ring on the same side as the shield
Vibration Velocity V Normal vibration level. Is not indicated as a standard.
V1 Lower vibration level than normal.
V2 Lower vibration level than V1.
V3 Lower vibration level than V2.
V4 Lower vibration level than V3.
Tolerances P0(ABEC1) Bearings in standard tolerance
P6(ABEC3) Tighter tolerance than standard bearings
P5(ABEC5) Tolerance tighter than P6
P4(ABEC7) Tolerance tighter than P5
P2(ABEC9) Tolerance tighter than P4
Radial internal clearance C1 Smaller clearance than C2
C2 Smaller clearance than CN
CN(C0) Clearance than normal
C3 Clearance larger than CN
C4 Clearance larger than C3
C5 Clearance larger than C4
Snap Ring Groove N Snap ring groove in the outer ring
NR Snap ring groove in the outer ring, with snap ring
N1 One locating slot in 1 outer ring side face
R Flanged outer ring
Other technical modifications NR Groove with inserted snap ring in outer ring.
N Snap ring groove in the outer ring.
SS Stainless steel.

Cage Materials J Pressed steel cages
M Solid brass cage
F Solid cage made from steel or iron
Y Pressed brass cages.
T Laminated phenolic cages.
TN Polyamide cages
TH Glass-fiber reinforced phenolic resin cages.
TV Polyamide cage
Cage Designs P Window-type cage
H Claw-type cage
A Cage guided on the bearing outer ring
B Cage-guided on the bearing inner ring
S Cage with lubricating slots in the guiding surfaces
D Carbonitriding cage
W Welded cage
R Riveted Cage
Cage Types N/A Claw-type cage
Ribbon cage
Crown cage
Sunflower cage
Tapered cage


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.

Designation Boundary Dimension (mm) Limiting Speed (rpm) Load Rating (Kn) Weight
Designation Inner Diameter
Outside Diameter
Grease Lubrication Oil Lubrication Dynamic Load
Static Load
6301 12 17 12 17000 22000 9.72 5.08 0.06
6302 15 42 13 16000 20000 11.5 5.42 0.082
6303 17 47 14 15000 18000 13.5 6.58 0.115
6304 20 52 15 13000 16000 15.8 7.88 0.142
6305 25 62 17 11000 13000 20.6 11.3 0.232
6306 30 72 19 6600 12000 26.7 15 0.346
6307 35 80 21 8500 10000 33.4 19.3 0.457
6308 40 90 23 7000 8500 40.8 24 0.639
6309 45 100 25 6300 7500 52.8 31.8 0.837
6310 50 110 27 6000 7000 61.8 38 1.082
6311 55 120 29 5600 6700 71.5 44.8 1.367
6312 60 130 31 5000 6000 81.8 51.8 1.71
6313 65 140 33 4500 5300 93.8 60.5 2.1
6313 70 150 35 4300 5000 105 68 2.55
6315 75 160 37 4000 4800 113 76.8 3.05
6316 80 170 39 3800 4500 123 86.5 3.61
6317 85 180 41 3600 4300 132 96.5 4.284
6318 90 190 43 3400 4000 145 108 4.97
6319 95 200 45 3200 3800 157 122 5.74
6320 100 215 47 2800 3600 173 140 7.09
6321 105 225 49 2600 3200 184 153 8.05
6322 110 240 50 2400 3000 205 178 9.53
6324 120 260 55 2200 2800 228 208 12.2
6326 130 280 58 2000 2600 253 242 14.77
6328 140 300 62 1900 2400 275 272 18.33
6330 150 320 65 1700 2200 288 295 21.87
6332 160 340 68 1600 2000 313 340 26.43

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Material Option 2: Stainless Steel
MOQ: One Pallet
Seals Options: Z / 2z, Rz / 2rz, RS / 2RS, Rsz / Rzz, Zn / Znr
US$ 0/Piece
1 Piece(Min.Order)


Order Sample



Customized Request

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Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

deep groove ball bearing

Can you provide examples of scenarios where high-speed rotation benefits from deep groove ball bearings?

High-speed rotation often benefits from the use of deep groove ball bearings due to their specific design features and capabilities. Here are examples of scenarios where deep groove ball bearings are advantageous for high-speed rotation:

  • Electric Motors:
  • Deep groove ball bearings are commonly used in electric motors that require high-speed rotation, such as those found in industrial machinery, automotive applications, and household appliances. The low friction and smooth operation of deep groove ball bearings allow electric motors to achieve efficient and reliable performance at high rotational speeds.

  • Machine Tools:
  • In machine tools, such as milling machines and lathes, high-speed rotation is often necessary to achieve precise cutting and shaping operations. Deep groove ball bearings enable smooth and precise rotational motion, ensuring the accuracy and efficiency of machining processes at high speeds.

  • Spindles:
  • Spindles in various applications, including woodworking machines, CNC routers, and grinding machines, require high-speed rotation for precision operations. Deep groove ball bearings with their ability to handle both radial and axial loads and their low friction characteristics provide the necessary support and stability for high-speed spindle rotation.

  • Turbomachinery:
  • In turbomachinery applications such as turbochargers, centrifugal compressors, and gas turbines, high-speed rotation is essential for efficient energy conversion and power generation. Deep groove ball bearings, with their ability to accommodate high speeds and handle radial loads, are used to support the rotating components of such turbomachinery, ensuring reliable and continuous operation.

  • Automotive Wheels:
  • Deep groove ball bearings are commonly used in automotive wheels, where high-speed rotation is required. They support the radial and axial loads encountered during vehicle operation and allow smooth rotation at highway speeds. Deep groove ball bearings contribute to the overall performance, safety, and durability of automotive wheels.

  • High-Speed Fans and Blowers:
  • In applications such as industrial fans, HVAC systems, and turbo blowers, high-speed rotation is necessary to generate the desired airflow or pressure. Deep groove ball bearings are employed to support the fan or blower rotor, enabling smooth and efficient rotation at elevated speeds while minimizing energy losses.

  • Rotating Machinery in Aerospace:
  • In aerospace applications, various rotating components, including jet engines, helicopter rotors, and satellite mechanisms, require high-speed rotation. Deep groove ball bearings, designed to withstand high speeds and provide reliable performance, are used in these aerospace systems to ensure smooth operation and support critical functions.

In summary, deep groove ball bearings are beneficial for high-speed rotation in a wide range of scenarios. They find application in electric motors, machine tools, spindles, turbomachinery, automotive wheels, high-speed fans and blowers, as well as rotating machinery in the aerospace industry. The low friction, smooth operation, and ability to handle radial and axial loads make deep groove ball bearings suitable for supporting high-speed rotation while ensuring performance, precision, and reliability.

deep groove ball bearing

What advantages do deep groove ball bearings offer compared to other types of bearings?

Deep groove ball bearings offer several advantages compared to other types of bearings, making them a popular choice for many applications. Here’s a detailed explanation of the advantages of deep groove ball bearings:

  • Versatility:
  • Deep groove ball bearings are highly versatile and can accommodate both radial and axial loads. This versatility allows them to be used in a wide range of applications, eliminating the need for multiple specialized bearings. Their ability to handle different load types simplifies inventory management and reduces the complexity of bearing selection.

  • High-Speed Performance:
  • Deep groove ball bearings are designed for high-speed operation. The smooth, low-friction rolling contact between the steel balls and the raceway grooves enables them to rotate at high speeds with minimal heat generation. This makes them suitable for applications that require fast rotational speeds, such as electric motors, turbines, and machine tool spindles.

  • Low Friction and Energy Efficiency:
  • Deep groove ball bearings offer low-friction operation due to the rolling contact between the balls and the raceway grooves. This results in reduced energy losses due to friction, making the bearings more energy-efficient. The low-friction characteristics contribute to improved system efficiency, reduced power consumption, and longer operating life.

  • Quiet and Smooth Operation:
  • Deep groove ball bearings provide quiet and smooth operation. The rolling contact between the balls and the raceway grooves produces less noise and vibration compared to other types of bearings. This makes deep groove ball bearings suitable for applications that require low-noise operation, such as household appliances, office equipment, and precision machinery.

  • Simple and Cost-Effective Installation:
  • Deep groove ball bearings are relatively easy to install and require minimal additional components. They can be easily mounted on shafts or in housing units using standard bearing mounting methods. This simplicity and ease of installation contribute to cost savings in terms of labor and equipment required for installation.

  • Wide Availability and Standardization:
  • Deep groove ball bearings are widely available and come in standardized sizes and configurations. This standardization simplifies the replacement process, as bearings with the same specifications can be easily sourced from various manufacturers. The wide availability and standardization of deep groove ball bearings contribute to shorter lead times, reduced downtime, and increased equipment availability.

In summary, deep groove ball bearings offer advantages such as versatility, high-speed performance, low friction, energy efficiency, quiet operation, simplicity of installation, and wide availability. These advantages make deep groove ball bearings a preferred choice in various applications across industries.

deep groove ball bearing

Can you explain the role of shields and seals in preventing contamination of deep groove ball bearings?

Shields and seals play a critical role in preventing contamination of deep groove ball bearings. These protective components act as barriers, preventing the ingress of contaminants such as dust, dirt, moisture, and other harmful substances into the bearing’s internal components. Here’s a detailed explanation of the role of shields and seals in preventing contamination of deep groove ball bearings:

  • Shield:
  • A shield is a metallic or non-metallic disc that is typically made of steel, synthetic rubber, or a combination of materials. It is designed to cover a portion of the bearing’s outer ring, leaving a small gap between the shield and the inner ring. The primary function of a shield is to provide a physical barrier that blocks the entry of contaminants into the bearing. Shields are effective in preventing larger particles, such as dirt and debris, from reaching the bearing’s internal components while allowing grease or lubricant to flow within the bearing.

  • Seal:
  • A seal is a flexible component typically made of rubber or synthetic materials. It is designed to completely enclose the bearing and create a tight seal between the outer and inner rings. Seals create a physical barrier that effectively blocks contaminants from entering the bearing. Unlike shields, seals provide a higher level of protection against fine particles, moisture, and other contaminants by forming a more complete seal around the bearing. This helps to maintain the integrity of the lubricant and reduce the risk of premature wear or damage to the bearing’s internal components.

  • Preventing Contamination:
  • Contamination is a major cause of premature bearing failure. When contaminants such as dirt, dust, or moisture enter the bearing, they can interfere with the lubrication, cause abrasive wear, or induce corrosion. This can lead to increased friction, heat generation, and accelerated wear, ultimately compromising the bearing’s performance and lifespan. Shields and seals act as protective barriers that prevent these contaminants from reaching the critical internal components of the bearing, preserving the lubricant’s integrity and maintaining a clean operating environment for the rolling elements and raceways.

  • Selection and Maintenance:
  • Proper selection and maintenance of shields and seals are essential for their effectiveness in preventing contamination. It is important to choose shields or seals that are suitable for the specific application and operating conditions. Factors such as the type and size of contaminants, temperature variations, and rotational speeds should be considered when selecting the appropriate shielding or sealing solution. Regular inspection and maintenance of shields and seals are also important to ensure they remain in good condition. Damaged or worn shields or seals should be promptly replaced to maintain the bearing’s protection against contamination.

In conclusion, shields and seals play a crucial role in preventing contamination of deep groove ball bearings. By acting as protective barriers, they safeguard the bearing’s internal components from the ingress of contaminants, preserving the lubrication, reducing wear, and extending the bearing’s service life. Proper selection, installation, and maintenance of shields and seals are essential to ensure their effectiveness in maintaining a clean and contaminant-free environment within the bearing.

China best High Chrome Carbon Bearing Steel Gcr15 Stainless Steel SUS440 95cr18 SUS420 30cr13 6204 6205 608 6003 6202 6001 6004 6302 6303 2RS Zz Deep Groove Ball Bearing   double row ball bearingChina best High Chrome Carbon Bearing Steel Gcr15 Stainless Steel SUS440 95cr18 SUS420 30cr13 6204 6205 608 6003 6202 6001 6004 6302 6303 2RS Zz Deep Groove Ball Bearing   double row ball bearing
editor by CX 2024-04-03