5/32" Steel Balls Grade 10 (Pack of 1200) – Small Size, Maximum Precision

In the world of precision mechanics, even the smallest component can make the biggest impact. That’s exactly where these 5/32 inch (3.97 mm) Grade 10 steel balls shine. Manufactured with hardened high-carbon steel and finished to Grade 10 tolerances, they offer elite performance for critical applications that demand extreme accuracy, durability, and reliability.

🔍 Precision in Every Micron

These steel balls are crafted to Grade 10 accuracy, meaning their size variation and roundness deviate by less than 10 microns. This level of precision guarantees ultra-smooth rolling, tight fits, and balanced load distribution — all essential for minimizing wear and energy loss in high-performance systems.

The mirror-like polished surface ensures minimal friction and makes them ideal for high-speed, low-resistance applications. With a Rockwell hardness rating of 60–66 HRC, they’re tough enough to withstand heavy stress and high-load environments without deformation or surface fatigue.

📦 What You Get:

• Diameter: 5/32 inch (3.97 mm)

• Material: High-carbon steel, heat-treated for extreme hardness

• Grade: 10 – tighter tolerances than lower grades

• Finish: Super-polished for low-friction operation

• Quantity: 1200 precision steel balls per pack

• Compliance: Manufactured under ISO 3290 and AFBMA guidelines

⚙️ Where These Balls Perform Best:

• High-Speed Bearings: Ensures flawless rotation in automotive, electric motors, and industrial machinery

• Gearboxes & Steering Systems: Provides consistent performance in demanding mechanical assemblies

• Robotic & Mechatronic Systems: Enables smooth, precision motion in compact automation systems

• Conveyor Systems & Actuators: Enhances motion control with reliable wear resistance

• Engineering Projects & Prototyping: Ideal for technicians and designers working on intricate mechanical builds

🧰 Advantages That Set Them Apart:

• ✅ Unmatched Precision: Grade 10 accuracy makes them ideal for high-sensitivity environments

• ✅ Long-Term Durability: Heat-treated steel resists impact, fatigue, and surface abrasion

• ✅ Ultra-Smooth Operation: Polished surface improves efficiency, reduces noise, and lowers wear

• ✅ Compact Efficiency: Their smaller size fits perfectly in dense assemblies and fine mechanisms

• ✅ Value in Volume: 1200-count pack provides enough for production and future maintenance

📌 Storage and Handling Tips

While incredibly strong, these are not stainless steel, so proper storage is key. Keep them in a dry, sealed container to prevent moisture exposure. Handle them with gloves or non-oily tools to maintain their finish and prevent rust or contamination during assembly.

🚀 Conclusion: Micro Precision, Macro Impact

Don’t let their size fool you — these 5/32" Grade 10 steel balls deliver uncompromising performance where it counts. Whether you're building a prototype, maintaining machinery, or assembling delicate systems, they offer the level of precision trusted by professionals in automotive, industrial, and robotics sectors.