Deep Groove Ball Bearing is widely used in various types of machinery due to its simple structure and stable performance. The following is a detailed analysis of its advantages, disadvantages, and applicable scenarios:
一、 Advantages
1. Simple structure and low manufacturing cost
Applicable scenarios: General machinery for mass production (such as motors and fans), cost sensitive equipment (such as toys and household appliances).
2. Low friction coefficient and high limit speed
The deep groove raceway design reduces the rolling resistance and friction coefficient of the steel ball, making it suitable for high-speed rotation (such as motor speeds up to tens of thousands of revolutions per minute).
Comparison: Compared to thrust ball bearings (which have strong axial load but low rotational speed), deep groove ball bearings are more stable under high-speed conditions.
Applicable scenarios: high-speed motors, electric tools, machine tool spindles.
3. Radial and axial bidirectional bearing capacity
It can withstand both radial and bidirectional axial loads simultaneously (with an axial bearing capacity of approximately 50% -70% of the radial load).
Comparison: Cylindrical roller bearings can only withstand radial loads, thrust bearings can only withstand axial loads, and deep groove ball bearings combine both.
Applicable scenarios: gearboxes, conveyor belts, and other situations that require simultaneous radial and axial forces.
4. Smooth operation with low noise
Precision machined raceways and steel balls result in low vibration and noise during operation, especially for sealed bearings.
Comparison: Needle roller bearings have higher friction noise due to their larger contact area;
Spherical Roller Bearings may experience greater vibration due to their complex structure.
Applicable scenarios: precision instruments, office equipment, medical equipment.
5. Easy maintenance and long lifespan
Sealed bearings (such as 2RS, ZZ) are filled with lubricating grease inside, eliminating the need for frequent lubricant addition and reducing maintenance costs.
When used correctly, the lifespan can reach tens of thousands of hours (such as motor bearings).
Applicable scenarios: environments that are difficult to maintain frequently, such as wind power equipment and rail transit.
6. High design flexibility
It can be adapted to different load requirements by adjusting the clearance, increasing the ball loading gap, or adopting a double row structure.
Variant type:
6200 series: Standard deep groove ball bearings, suitable for medium loads.
6300 series: Increase the ball diameter and increase the rated load.
Double row deep groove ball bearings: with stronger load-bearing capacity, suitable for heavy-duty low-speed scenarios.
二、 Disadvantages
1. Limited axial bearing capacity
When the axial load exceeds the rated value, the contact stress between the steel ball and the raceway increases, which may lead to early failure.
Not applicable scenarios: high axial force equipment (such as CNC machine tool spindles, automotive clutches).
2. Sensitive to installation errors
When the shaft and bearing seat are different and the shaft is too large, it can cause unbalanced load and exacerbate wear.
Solution: It is necessary to strictly control the installation tolerance or choose self-aligning ball bearings (which can be self-aligning).
Not applicable to environments with poor shaft rigidity and high vibration (such as punching machines).
3. Poor impact resistance
The contact area between the steel ball and the raceway is small, and it is prone to indentation or cracking when subjected to impact loads.
Comparison: Roller bearings (such as cylindrical roller bearings) have a larger contact area and stronger impact resistance.
Not applicable scenario: Heavy load start stop equipment (such as cranes, mining machinery).
4. Limited high-temperature performance
The suitable temperature range for ordinary deep groove ball bearings is -30 ℃ to+120 ℃. Lubricating grease is prone to deterioration at high temperatures, and the hardness of steel balls decreases.
Solution: High temperature grease or ceramic ball bearings (with a temperature resistance of up to 300 ℃) should be selected.
Not applicable to high-temperature environments such as metallurgical equipment and baking machinery.
5. Sealed bearings have poor heat dissipation performance
Rubber sealing rings or metal dust covers can hinder heat dissipation, and long-term high-speed operation may lead to high temperatures.
Solution: Open type bearings require regular lubrication or use a sealed design with a pressure relief groove.
Not applicable scenario: High speed rotating equipment in enclosed spaces (such as certain centrifuges).
三. Summary
Deep groove ball bearings have the core advantages of economy, universality, and high speed, and are suitable for more than 80% of rotating machinery scenarios. However, the limitations of its axial bearing capacity, impact resistance, and high temperature performance need to be avoided through reasonable selection or alternative solutions. In practical applications, comprehensive evaluation of parameters such as load, speed, and temperature can maximize its performance and cost-effectiveness.
Qingdao Yizhou bearings technology co., ltd
