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1/4" Precision Steel Balls – Grade 40 | Pack of 2000
Engineered for Accuracy. Built for Reliability. Trusted Across Industries.


🔩 Overview:

The 1/4" Steel Balls – Grade 40 are precision-manufactured components designed to deliver exceptional performance in applications that demand consistent roundness, high strength, and reliable durability. Crafted from hardened high-carbon steel and finished to meet Grade 40 tolerance standards, these steel balls are ideal for industrial, mechanical, and DIY uses that require exacting specifications.


⚙️ Technical Specifications:

ParameterValueDiameter1/4 inch (6.35 mm)GradeG40 (Sphericity tolerance ±13μm)MaterialHardened High-Carbon SteelSurface FinishPolished (Mirror-like)HardnessRockwell HRC 60–66DensityApprox. 7.85 g/cm³Quantity2000 balls per packToleranceISO 3290 / AFBMA Standard Compliance


🛠️ Manufacturing Precision:

These balls are engineered under controlled heat treatment and CNC-grade grinding processes to ensure uniform diameter, roundness, and surface finish. The Grade 40 classification indicates ±13 microns maximum deviation in sphericity, making them suitable for mid-to-high precision machinery.


🧰 Use Case Applications:

Industrial & Mechanical:

  • Ball bearings and rolling elements

  • Valves, check balls, and flow regulators

  • Gearboxes, linear actuators, and pumps

Automotive:

  • CV joints, universal joints

  • Steering columns and drive shafts

Tooling & Instrumentation:

  • Precision instruments

  • Measuring devices

  • Robotics and motion control systems

DIY & Recreational:

  • High-power slingshots (check local regulations)

  • Prototyping, mechanical design, and metal crafting


🧪 Material & Durability Benefits:

  • Hardness & Load Capacity: With a Rockwell hardness above 60 HRC, these balls can withstand substantial static and dynamic loads without deformation.

  • Wear Resistance: Ideal for applications involving repetitive motion or high-pressure contact.

  • Polished Finish: Reduces friction and prevents premature wear in high-speed applications.