Our long cooperation customer order solid stainless steel balls

One day we receive the message from our long cooperation customer:

We need the bearings's solid stainless steel balls for our new project. appreciate for more details.

Hi friend,when selecting the size of the solid stainless steel balls, it is necessary to first clarify the usage requirements and working environment of the bearing. The size of the solid stainless steel balls directly affects the bearing capacity and operational stability of the bearing. Larger steel balls can increase the contact surface and enhance the bearing capacity, but may also lead to increased internal clearance, affecting accuracy. At the same time, the size of the solid stainless steel balls also affects the frictional heat, and small-sized steel balls may increase the contact pressure, generate more heat, and affect the service life and surrounding components. Therefore, when choosing, it is necessary to comprehensively consider factors such as load-bearing requirements, speed, temperature, lubrication method, etc.

Accuracy level and testing data of solid stainless steel balls
The accuracy of bearing steel balls is distinguished by a series of grades, such as G5, G10, G16, G20, etc. The smaller the number, the higher the accuracy. Common steel ball/steel ball sizes include 1.5875mm, 2.3812mm, 3.175mm, etc., which are suitable for different application requirements.

The material of solid stainless steel balls includes 304/316/316L/420/420C/440/440C, among which 304 solid stainless steel balls are the most widely used. A customer is curious about which type of 304 316 stainless steel beads is better? Below is a brief explanation:
304 stainless steel contains 18%~20% chromium and 8%~10.5% nickel, while 316 stainless steel contains 16%~18% chromium and 10%~14% nickel. Chromium is the main element that improves the corrosion resistance of stainless steel, while nickel can enhance the strength and toughness of the material. Therefore, both have good corrosion resistance and high temperature resistance; 316 solid stainless steel balls contains 2% molybdenum element, which makes it more corrosion-resistant and high-temperature resistant compared to 304. It is commonly used in products and equipment with high acidity and alkalinity, as well as marine equipment.

420 solid stainless steel ballsare commonly used in industries that require high precision and rust resistance, such as motorcycle parts, pulleys, stainless steel bearings, plastic bearings, handicrafts, valves, and petroleum.

Material comparison:

Domestic 420 solid stainless steel balls are mainly divided into two types: 2Cr13 steel balls (corresponding to Japanese standard: SUS420J1 stainless steel balls) and 3Cr13 steel balls (corresponding to Japanese standard SUS420J2 stainless steel balls). Both types of steel balls have hardness, and many customers have a misconception that 410 solid stainless steel balls (corresponding to national standard: 1Cr13 steel balls) and 430 stainless steel balls (1Cr17 steel balls) have the same hardness. Although these two types of steel balls are both 4 series stainless steel balls, their metallographic structures are different: one is martensitic steel, and the other is ferritic steel

Features:

The representative of martensitic steel, commonly known as stainless iron, has magnetism, good rust resistance, and high hardness HRC50-55.