6308 40mmX90mmX23mm

The 6308 bearing is a type of deep groove ball bearing consisting of an inner ring, an outer ring, balls, and a cage. It has an inner diameter of 40 millimeters, an outer diameter of 90 millimeters, and a thickness of 23 millimeters. The surfaces of the outer and inner rings are usually ground and polished to improve their surface smoothness and wear resistance. The steel balls are processed and polished to ensure their roundness and surface smoothness, thereby improving the efficiency and lifespan of the bearing.
It can withstand large radial and axial loads and has good rotational performance and durability. This type of bearing has a high operating speed and stability, and its design structure can reduce noise and vibration while improving its lifespan and reliability.

Wuxi Jieerte Bearing Co., Ltd. is a professional manufacturer of deep groove ball bearings. The company has 20 production lines for deep groove ball bearings, with a daily output of 100,000 sets. Its quality and environmental management system have passed ISO 9001 and ISO 14001 certification. The company has its own brand "JSJET" and also provides OEM services. Our products are known for their high precision, low noise, long service life, and stable performance. They are widely used in various industries such as motors, water pumps, automobile transmissions, motorcycle engines, conveying systems, agricultural machinery, mining equipment, and construction machinery.

What are our advantages?

(1) Advanced production equipment

(2) Strong technical force

(3) High production capacity

(4) Short delivery time

(5) Low MOQ

(6) Strict quality control

(7) Competitive price

(8) ISO9001:2018 certification

Bearing Model:6308,6308C3,6308Z 6308ZZ,6308ZZ/C3,6308RS,6308-2RS,6308-2RS/C3

Bearing Material:Chrome steel (Gcr15)

Cages: Stell cages,Brass cages,Nylon cages

Sealing/Shield: Z, ZZ, RS, 2RS，Opean

Noise Level: Z1 V1 , Z2 V2 , Z3 V3 ,Z4 V4

Application: motors, motorcycles,casters,water pumps, automobiles, textile machinery,conveyor machinery,agricultural machinery

Dimensions	Performance
Bore Diameter 40mm	Basic Dynamic Ioad Rating 40.8KN
Bore Diameter Tolerance 0/-0.008mm	Basic Static Load Rating 24KN
Outside Diameter 90mm	Limiting Speed 7000r/min
Outside Diameter Tolerance 0/-0.011mm	Reference Speed 8500r/min
Width 23mm	Maximum Temperature 120℃
Width Tolerance 0/-0.12mm	Minimum Temperature -20℃
Weight 0.639KG	Place Of Origin China

Package

(1) Industrial Exporting Package with anti-tarnish

paper/Carton/Pallet

(2) Individual Paper Box/Carton/Pallet

(3)tube package+middle box+outer carton+pallets

(4) According to your requirement.

We Produce Deep Groove Ball Bearings video

We produce 6308 bearing have the following characteristics:

1、High Load Capacity: Our 6308 bearing has a static load capacity of 24KN and a dynamic load capacity of 40.8KN, which means it can withstand significant loads and is suitable for applications that require high load capacity.

2、High Speed: Our 6308 bearings can operate at high speeds, and the steel balls inside the bearing provide sufficient support when rotating at high speeds, making them less susceptible to damage, typically up to around 7000 revolutions per minute.

3、High Precision: Our 6308 bearings are measured and processed with precision for their inner diameter, outer diameter, and width, ensuring proper fit between all internal components and smoother, safer bearing rotation.

4、Long Life: Our 6308 bearings are made of high-quality materials and precision manufacturing processes, with high wear resistance and corrosion resistance. The steel balls inside the bearings reduce internal friction and wear, ensuring long-term stable performance.

5、Good sealing performance: Our 6308 bearings have excellent sealing performance and can be sealed with metal covers, rubber seals, or nylon seals to prevent external dust and impurities from entering the bearing and to prevent grease leakage.

6、Low Noise: The 6308 bearing has a spherical design for the contact area between the ball and the cage, which reduces friction noise when the ball moves axially and radially, resulting in low noise.

7、Wide Applicability: The 6308 bearing has a well-designed structure, strong load-bearing capacity, good speed performance, and low frictional losses. It is suitable for various applications, including motors, mechanical transmissions, automation equipment, agricultural machinery, and machine tools.

We produce 6308 bearing mainly through the following steps:

1. Raw material preparation: High-quality bearing steel such as GCr15 is selected and undergoes chemical analysis and quality testing before entering the production process.

2. Heat treatment: The raw material undergoes heat treatment, including tempering, quenching, and other processes, to change the mechanical properties and structure of the material. These steps help to improve the hardness, strength, and corrosion resistance of the steel.

3. Cold extrusion: The raw material that has undergone heat treatment is cold extruded to make it into a circular bearing outer and inner ring. This process can improve the density and uniformity of the raw material.

4. Grinding and machining: The bearing outer and inner rings are ground and machined to improve dimensional accuracy and surface quality. This step is crucial because the geometric shape and surface quality of the bearing have a significant impact on its performance.

5. Cutting the cage: The cage raw material is cut to shape the cage. The cage's function is to fix the bearing balls and maintain a certain distance when running.

6. Bearing ball manufacturing: Bearing steel is cold or hot forged into spherical bearing steel balls. The size and quality of the bearing balls are also crucial to the bearing's performance.

7. Cleaning and polishing: The manufactured bearing balls are cleaned and polished to improve surface finish and reduce frictional losses. This step can reduce bearing friction and wear, thus extending the bearing's service life.

8. Assembly: The bearing balls, outer and inner rings are assembled together and fixed with a bearing cage. The assembly process requires ensuring the dimensional and quality accuracy of each component to ensure the bearing's performance.

9. Lubrication: Lubricating grease or oil is injected into the bearing's interior to reduce bearing wear and friction. Lubrication can reduce friction between the bearing balls and cage, thus reducing bearing wear.

10. Inspection: Quality inspection of 6308 bearing includes inspection of appearance, dimensional measurement, rolling resistance testing, noise testing, and other aspects. Precision measuring instruments and equipment are used during the inspection to ensure product quality and performance.

11. Packaging and shipping: The 6308 bearing that has undergone quality inspection need to be packaged to protect them from damage. Common packaging materials include cartons, wooden boxes, and pallets. Finally, the products can be shipped to customers by sea, air, or land transportation.

Our Production Workshop

Q1: Are you a trading company or a manufacturer?

A1: We are a manufacturer.We have our own factory ;our type is factory +trade

Q2: How long is your delivery time?

A2: Generally it is 15-20 days, if the goods are in stock, it is 3-7 days, if the goods are not in stock, it depends on the quantity.

Q3: Do you provide samples? Is it free or extra?

A3: Yes, we can provide samples for free, but we don't pay shipping fee.

Q4. How do you control the quality,and what if there is quality problem?

A4: All bearings will be 100% strictly inspected before shipment, including hardness, size, noise, speed, vibration and accuracy. If there is any quality problem, we will replace all faulty products with our shipping cost or refund to you.

Q5:OEM and customized can you accept?

A5: Yes, OEM is accepted, also can be customized for you according to samples or drawings

Q6: What are your shipping conditions.

A6: We can arrange shipping by sea to your nearest seaport or deliver to your doorstep. Air freight is also possible. We can help with all import formalities. It takes about 25-40 days by sea and 3-7 days by air.

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