Supply Zhejiang AISI52100 ball bearing steel ball 11.1125mm G20 ball bearing steel ball

 Bearings steel ballThe key lies in the classification of levels, that is,Ball bearings are available in a wide range of precision levels.According to the national standard GB/T308-2002 grade list, it is divided into G5, G10, G16, G28, G40, G60, G100, G200, G500, G1000, etc. The letter "G" stands for the word "Grade" in English, and the following numbers represent different grades.The smaller the number, the higher the precision, and the better the steel ball.High precision is generally used in industries such as precision machinery, automotive parts, aerospace, etc., where high requirements are needed; low precision is usually used in industries such as grinding, crushing, stirring, etc.

   Ball bearings, as the main component of bearings, directly affect the working performance and service life of the bearings. With the advancement of technology, there is an increasing demand for reduced noise, higher precision, reliability, and extended service life of bearings.Bearing steel ballQuality requirements have also increased. The key to the quality of steel balls lies not only in raw materials but also in the processing equipment. Among the processing equipment, the grinding process is crucial. With the continuous upgrades of steel ball production equipment, resin grinding wheels with more advantages are now widely used in precision grinding equipment.

Let's take a look below:

Resin bonded sand wheels are made by mixing high precision abrasive micro powder with high strength adhesive, and then molded, hardened, and processed. The abrasive particles required have a uniform diameter, with no large particles, and will not scratch.Steel ballSurface. The adhesive is made by mixing several imported resins in proportion, offering good adhesion, heat dissipation, and some elasticity. The characteristics of the resin abrasive wheel are: fine grain size, high hardness, uniform and dense internal structure, adaptable to various grinding conditions, and different specifications of steel balls, with a regular appearance as well.Steel ball processingDuring the process, initial and fine grinding stages typically use cast iron plates combined with abrasive materials for polishing. To enhance the quality of steel balls, a finer grit resin abrasive wheel grinding method is now employed instead of the original cast iron plate method with coolant and abrasive materials. The initial grinding stage uses a finer grit abrasive wheel, while the fine grinding stage uses an ultra-fine grit resin abrasive wheel, significantly improving the surface morphology and quality of the steel balls.

We address all your concerns and answer your questions one by one:

How to choose steel balls?

(1). If you're looking for high hardness and wear resistance, opt for the bearing steel ball with wear resistance, followed by the carbon steel ball that has been heat treated.

(2). If you need to weld something with low hardness, use carbon steel balls without heat treatment, commonly known as iron balls.

(3). For superior rust prevention, opt for stainless steel balls, available in grades 304, 316, and 316L, with increasing rust resistance.

(4). For excellent rust prevention and high hardness, opt for 440 stainless steel balls.

(5). For higher precision, choose a higher grade; the smaller the number, the higher the grade, and the better the precision.

 If the above does not answer your questions or you are still unclear about the type of steel ball you need, feel free to contact our customer service. Clearly explain your application, and our professional staff will provide you with a satisfactory solution!

2. Quality Assurance

Raw Material Assurance: Steel billets sourced from major steel mills.

(2). Production Equipment Assurance: Introduction of production equipment and testing instruments.

(3). Technical Staff Support: Over a decade of technical staff, on 24/7 rotational duty for production supervision and control.

(4). Rigorous production management system with strict constraints: Strictly managed, adheres to production regulations, traceable with responsibility tracing.

(5). A sealed and tidy cleanroom: Ensures the high precision production of precision steel balls.

3. Shipping Information

（1). Samples sent via SF Express: A small number of samples can be provided free of charge, with shipping charges to be paid by the recipient.

(2) Shipments under 300 kg are handled by Yousu Express, Best Express, Debang Logistics or Courier, Jiayi Logistics, Shangqiao Logistics, etc.

(3). For shipments over 300 kg, use dedicated logistics. Generally, pick up at the city logistics center. If pick-up is required at the county/district level, please specify. Additional delivery fees will apply for delivery service.

4. Packaging

We offer various packaging options including woven bags, cardboard boxes, pallets, steel drums, bottled, and ton bags, and can customize packaging to meet customer requirements.

5. Where is the shipment origin from?

Our factory is located in the countryside, where logistics and express delivery are not convenient. Therefore, we lease a large warehouse in the Liaocheng City's large logistics park to store goods and ship them to our customers.

6. Return and Exchange Policy

If it's our responsibility and the quality does not meet the standards, we will cover the round-trip shipping costs for returns and exchanges. If it's the buyer's responsibility, returns and exchanges are possible as long as it doesn't affect resale, with the buyer covering the shipping costs both ways.