Product Description

Engineering machinery machine tool manufacturing equipment bearings 6312ZZ deep groove ball bearing

Product Description

Deep Groove Ball Bearing

Deep groove ball bearings are designed as non-separable bearings with the characteristics of simply designed structures,low friction coefficient and high limit rotational speed. They can mainly carry radial load and certain axial load. When the radial internal clearance increases, the bearings have the funtions of angular contact ball bearings that a larger axial load can also be carried. 

Deep groove ball bearigns are compose various structures bebsides open bearings; we can also see single shielded/sealed bearings, double shielded/sealed bearings. All bearings are prefilled with lubricating grease; the users can direct start it without cleaning and lubricating it first. In addition, deep groove ball bearings with snap ring groove on outer rings are strongly recommonded to you, as this kind of bearing can use snap rings to easily fix the bearings in the bearing box. So when the mounting position is restrained, take deep groove ball bearings with snap ring groove on outer ringsas priority.
Mostly, deep groove ball bearigns use ribbon cage made of pressedsteel sheet, or solid cage.

Product Parameters

Detailed Photos


Company Profile

HangZhou HONGSHI MACHINERY AND ELECTRICAL EQUIPMENT CO.,LTD. (formerly HangZhou Hengmai Bearing Co., Ltd.) was established in 2007, and HMMH is our own brand.
HMMH mainly produces spherical roller bearings, pillow block ball bearing, deep groove ball bearings and cylindrical roller bearings. Spherical roller bearing products range from 20mm to 1M, with the main production of crusher bearings 22300 series. Low noise deep groove ball bearings, product accuracy can reach ZV2, ZV3, ZV4, mainly produces motor bearings 6200, 6300 series. pillow block ball bearing, mainly producing UCP, UCF, UCFL, UCFC, UCT series, the products are mainly used in agricultural machine and peeling machine. We also use the bainite quenching process to ensure the hardness of the bearing, using good testing equipment, such as roundness meter, profiler, roughness meter, universal measuring instrument, spectrometer, metallographic microscope to control each detail quality monitoring.

To ensure product quality, we have established a strict quality control system and an experienced team of engineers and after-sales service. From forgings to final products  we have a strict quality control system.

Your needs are our production motivation, and your satisfaction is our goal. We are willing to serve our customers with the goal of “Quality First, Service First, Credit First”.


1.A:How can I do customized design?
   Q:We are request for the drawing with the measurement, material and other speicifcation as details as you can, and for the customized products, our MOQ is 10 pcs per design

2.Q: How can I get a sample?
   A: If you only need 1or 2 samples for small size inner weight below 2kgs, we can supply free samples and we have stocks, you can just pay the shipping cost .if you need several design samples, then you should paid the cost with shipping.

3.Q: What package do you usually use?
   A: Usually we use single box or tape. Also according to customer’s special requirement.

4.Q:How long do you need for production? Or what’s your production lead time?
   A:Usually could be sent our in 2-3 days if in stock for samples. Customized item usually need 14-30 days to produce.

5.Q:How long will you guarantee your quality?
   A:We supply test report and quality control photos from materials to finished goods during production.
6.Q:How to do after sale service?
   A:Good after-sale service is our promise. Before placing orders, our professional engineer will discuss all technical data and your bearing usage condition and CZPT you what kind of steel materials to fit your products and usage life possible.




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Product Name: Deep Groove Ball Bearing
Key: Auto Bearing
Old Spec: 312
Used for: Agricultural Machinery, Transportation System
Environmental: Yes
Weight: 1.71kg
US$ 2/Piece
1 Piece(Min.Order)

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Customized Request

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 factors should be considered when selecting a deep groove ball bearing for a specific application?

When selecting a deep groove ball bearing for a specific application, several factors need to be considered to ensure optimal performance and reliability. Here’s a detailed explanation of the factors that should be taken into account:

  • Load Requirements:
  • One of the primary considerations is the type and magnitude of the loads the bearing will be subjected to. Determine whether the application requires primarily radial loads, axial loads, or a combination of both. Consider the load capacity, both dynamic and static, of the bearing to ensure it can handle the expected loads without premature failure.

  • Speed and Rotational Requirements:
  • Consider the rotational speed requirements of the application. Deep groove ball bearings are suitable for high-speed applications, but factors such as bearing design, lubrication, and cage material can impact their maximum allowable speed. Determine the required speed and ensure the selected bearing is capable of operating within the desired rotational limits.

  • Size and Dimensions:
  • Consider the space limitations and the available shaft and housing dimensions. Select a deep groove ball bearing with the appropriate bore diameter, outside diameter, and width that can be accommodated within the given space. Ensure that the bearing’s dimensions meet the requirements of the specific application.

  • Operating Conditions:
  • Evaluate the operating conditions, including temperature, humidity, contamination levels, and presence of corrosive or abrasive substances. Choose a bearing with suitable sealing or shielding options to protect against environmental factors. Consider the temperature range and select a bearing with appropriate heat resistance and lubrication compatibility for reliable performance under the anticipated conditions.

  • Precision and Tolerance:
  • Determine the required level of precision and tolerance for the application. Deep groove ball bearings are available in various precision classes, ranging from general-purpose bearings to high-precision bearings for demanding applications. Consider the required dimensional accuracy, running accuracy, and stability to ensure the bearing meets the performance expectations.

  • Lubrication and Maintenance:
  • Consider the lubrication requirements and maintenance capabilities of the application. Different operating conditions may require specific lubrication methods such as grease or oil, and the bearing should be suitable for the chosen lubricant. Evaluate the maintenance requirements and select a bearing that aligns with the maintenance practices and resources available.

  • Cost and Availability:
  • Factor in the cost and availability of the deep groove ball bearing. Consider the budget constraints while ensuring the selected bearing meets the performance requirements. Check the availability of the bearing from reputable suppliers to ensure timely replacements or spares if needed.

In summary, when selecting a deep groove ball bearing for a specific application, it is crucial to consider factors such as load requirements, speed and rotational requirements, size and dimensions, operating conditions, precision and tolerance, lubrication and maintenance, as well as cost and availability. Evaluating these factors will help ensure the chosen bearing is suitable for the application and will deliver reliable performance and longevity.

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 Good quality Engineering Machinery Machine Tool Manufacturing Equipment Bearings 6312zz Deep Groove Ball Bearing   bearing exampleChina Good quality Engineering Machinery Machine Tool Manufacturing Equipment Bearings 6312zz Deep Groove Ball Bearing   bearing example
editor by CX 2024-03-29