Product Description
| Parameter | Published Specification |
| Material Type | High-carbon chromium bearing steel |
| Diameter Range | 0.5–25.4 mm |
| Precision Grade Range | G10–G1000 |
| Finished-Ball Hardness | HRC 60–66 |
| Density | 7.81 g/cm³ |
| Magnetic Response | Magnetic |
| Element | Symbol | Published Content |
| Carbon | C | 0.95–1.10% |
| Silicon | Si | 0.15–0.35% |
| Manganese | Mn | 0.25–0.45% |
| Phosphorus | P | ≤0.025% |
| Sulfur | S | ≤0.025% |
| Chromium | Cr | 1.30–1.60% |
| Nickel | Ni | ≤0.25% |
| Copper | Cu | ≤0.25% |
| Molybdenum | Mo | ≤0.08% |
SUJ2 balls can be manufactured for deep-groove ball bearings, angular-contact bearings, thrust bearings and other rolling-bearing assemblies.
Small-diameter SUJ2 steel balls can be evaluated for miniature bearings used in instruments, small motors and compact mechanical assemblies. Dimensional consistency and surface condition should be specified according to the bearing design.
Precision SUJ2 balls can be supplied for motor-bearing applications requiring controlled diameter, spherical geometry and batch consistency.For servo motor bearing projects, provide the bearing drawing or confirmed steel ball specification.
SUJ2 balls are used in recirculating ball screws, linear guides and precision motion systems. These applications may require selected ball gauges to establish the intended clearance or preload.
Hardened SUJ2 balls may also be evaluated for mechanical components requiring wear resistance and a precision spherical contact surface. The mating material, load, movement, lubrication and operating environment should be included in the technical inquiry.
No. The material requirement and finished-ball precision requirement should be stated separately. Include the applicable ball standard or drawing limits alongside the SUJ2 material designation.
No. SUJ2 is a Japanese material designation, not a statement of manufacturing origin. RISHENG manufactures steel balls in China; any material-origin requirement should be stated separately.
A model number is useful background, but the ball drawing or confirmed ball specification is preferable. Internal ball dimensions and assembly requirements can differ between bearing designs.
Send the required gauges and quantity for each group. Availability, separate packing and label identification can then be reviewed as part of the quotation.
