High-precision steel balls for smooth performance
Steel balls for rolling bearings are critical components used in various machines, such as rotating machinery, automobile wheels, and power tools. These steel balls primarily reduce mechanical friction, ensuring the smooth operation of rotating parts.
Characteristics
Characteristics
Highly durable and suitable for long-term use
Steel balls for rolling bearings are primarily made from high-carbon chromium bearing steel (SUJ2). This material undergoes vacuum degassing to minimize non-metallic inclusions that could compromise durability, making them capable of withstanding prolonged use.
Applications（Examples）
- Ball bearings
- Used in automobiles and industrial machinery, offering safety and reliability with world-class precision and durability.
- Linear guides
- Used in semiconductor manufacturing equipment and LCD production equipment, contributing to smooth operation and high durability.
- Ball screws
- Used in medical devices and robots, these aiding in the enhancement of precise movements and positioning accuracy.
From our Product Representatives
Our products are utilized across a wide range of fields and are primarily used as components for bearings. Due to their widespread use, we offer a diverse lineup in terms of both precision and size. We are also committed to quality assurance and adhere to all relevant regulations.
AKS’s flagship products can be tailored to meet various needs. Please do not hesitate to contact us when making your decision.
Product Specifications
1. Chemical composition of material (%)
| C | Si | Mn | P | S | Cr | Mo | Ni | Cu 1) | |
|---|---|---|---|---|---|---|---|---|---|
| JIS standard SUJ2 | 0.95 to 1.10 | 0.15 to 0.35 | 0.50 or less | 0.025 or less | 0.025 or less | 1.30 to 1.60 | 0.08 or less | 0.25 or less | 0.25 or less |
1）Copper content of the wire rod must be 0.20% or less.
2） Elements not specified in this table must not be intentionally added except for the purpose of refining molten steel unless agreed upon by the relevant parties.
3）Our products are primarily made using SUJ2.
2. Dimensions and dimensional accuracy
Conforms to Japanese Industrial Standard JIS B1501-2009
3. Hardness
| Nominal size | Hardness | |
|---|---|---|
| HV | HRC | |
| 0.3 to 3mm | 772 to 900 | (63 to 67) |
| 1/8 to 30mm | – | 62 to 67 |
| 1 3/16 to 4 1/8 | – | 61 to 67 |
*Values in parentheses are converted values for reference purposes.
Mechanical Properties (Reference Values)
| Material | Density (g/cm³) | Hardness (HV) | Young’s Modulus (GPa) | Poisson’s Ratio | Thermal Expansion Coefficient(×10-6/℃) | Thermal Conductivity(W/mK) | Magnetism | Electrical Conductivity |
|---|---|---|---|---|---|---|---|---|
| SUJ2 Steel Balls | 7.8 | 850 | 207 | 0.3 | 12.5 | 46 | Magnetic | Conductive |
