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3/16" Steel Balls – Grade 40 | Pack of 2000

Industrial-Grade Precision | Engineered for Mechanical Excellence

When your application demands reliable, uniform, and wear-resistant motion, choose the precision of 3/16" Steel Balls – Grade 40. These high-carbon steel balls are manufactured to exacting standards, offering dependable performance in medium-precision mechanical and industrial systems. Whether you're assembling bearings or crafting mechanical systems, this bulk pack ensures consistency and long-lasting utility.


⚙️ Technical Specifications:

ParameterSpecificationDiameter3/16 inch (4.76 mm)GradeG40 (ISO 3290 standard)Sphericity Tolerance±13 µmMaterialHardened High-Carbon SteelFinishPolished, mirror-likeHardness~HRC 60–66Density~7.85 g/cm³Pack Quantity2000 balls


🔩 Precision Engineering for Demanding Applications

Grade 40 steel balls maintain high roundness accuracy, offering a tolerance level suitable for moderate-to-high-precision mechanisms. Each ball undergoes controlled heat treatment and precision grinding, resulting in a polished finish that reduces friction and improves performance in dynamic assemblies.


🛠️ Use Case Applications:

Mechanical & Industrial Systems:

  • Ball and roller bearings

  • Gear assemblies

  • Cam followers

  • Conveyor mechanisms

Automotive Components:

  • Transmission systems

  • CV and U-joints

  • Steering column bearings

Precision Instruments:

  • Actuators and linear guides

  • Valves and control systems

  • Lab equipment and test rigs

Recreational & DIY:

  • High-power slingshots (check legality in your region)

  • Robotics and mechanical modeling

  • Engineering prototypes


🧪 Material & Performance Benefits:

  • High Hardness: Rockwell 60+ ensures deformation resistance under load.

  • Tight Tolerances: Consistent dimensions for balanced, vibration-free operation.

  • Smooth Finish: Minimizes surface friction, allowing longer operational life.

  • Mass Quantity: 2000-piece pack for efficient stocking, production, or high-volume replacement use.