Grades G5 G100 High Precision Bearing Balls Diameter 1mm 120mm Engineered for Precision Equipment

Product Description:

Our High-Precision Bearing Balls are designed to satisfy the strict performance demands of modern industrial systems, delivering stable operation and long-term reliability. Produced from high-grade bearing steels such as GCr15 and GCr15SiMn, these balls offer excellent wear resistance, strength, and durability, enabling consistent performance even in harsh or high-load environments.

To match different precision requirements, our bearing balls are manufactured in a comprehensive accuracy range from Grade G5 to G100. This allows users to choose the ideal precision level for their application—whether for high-speed bearings, precision measuring instruments, or aerospace and other critical components. Higher grades provide tighter tolerances and improved running accuracy for demanding systems.

Each ball is fine-polished to achieve a clean, smooth surface with a premium finish. This high-quality surface reduces friction and abrasion during operation, helping to lower heat generation, improve efficiency, and extend bearing service life—particularly important in high-speed or high-performance applications.

Roundness and alignment consistency are essential to bearing performance. Our products achieve an outstanding concentricity tolerance of ≤ 0.001 mm, supporting uniform rotation while reducing vibration and noise. Such precision improves running stability and minimizes errors in equipment where exact motion control and alignment are critical.

We offer a broad size selection ranging from 1 mm to 120 mm in diameter, supporting applications from micro-mechanical assemblies to heavy-duty industrial machinery. Regardless of size, the same strict manufacturing standards are applied to ensure dependable quality and consistent dimensional accuracy.

To ensure compliance and repeatability, our bearing balls are subjected to strict inspection and quality-control procedures, in line with applicable international standards and customer specifications. This testing ensures every batch meets required performance criteria before delivery.

Material hardness is carefully controlled to provide the right balance of load capacity and deformation resistance. With optimized hardness based on GCr15 / GCr15SiMn, the balls maintain structural stability under continuous stress, delivering long service life and dependable performance.

In summary, our High-Precision Bearing Balls combine premium materials, precision manufacturing, polished surface quality, and rigorous quality assurance. With multiple grades and a wide diameter range, they are a trusted solution for precision engineering and industrial bearing systems where accuracy and durability matter.

High Precision Bearing Balls (GCr15 / GCr15SiMn) — For Smooth, Quiet, Long-Life Performance

Upgrade your bearing performance with precision-made balls engineered for high speed, high load, and long service life. Ideal for manufacturers and distributors seeking stable quality, consistent tolerances, and reliable supply.

Key Advantages

• Premium Bearing Steel Materials

  • Made from GCr15 and GCr15SiMn for excellent hardness, wear resistance, and fatigue strength
  • Built to perform under demanding operating conditions

• Wide Precision Grades (G5–G100)

  • Choose the right accuracy for your application—from standard industrial use to ultra-precision systems
  • Higher grades deliver tighter tolerances, lower vibration, and better running stability

• Ultra-Low Concentricity for Stable Rotation

  • Concentricity tolerance: ≤ 0.001 mm
  • Helps reduce noise, vibration, and operational error in precision equipment

• Mirror-Polished Surface Finish

  • Fine polishing creates a smooth, clean surface
  • Reduces friction and wear, improves efficiency, and extends bearing life

• Full Size Coverage (1 mm–120 mm)

  • From miniature assemblies to heavy-duty machinery
  • Consistent quality across all sizes

• Strict Quality Control & Certification Support

  • Rigorous inspection for dimensional accuracy and surface quality
  • Manufacturing aligned with international quality requirements (certification documents available upon request)

Typical Applications

• Deep groove ball bearings / roller bearings
• High-speed motors and spindles
• Precision instruments & measuring equipment
• Automotive components
• Aerospace and other high-reliability assemblies
• Industrial machinery and gear systems

Why Buyers Choose Us

• Stable batch consistency for mass production
• Multiple grades & sizes to fit different market demands
• Professional support for specification matching and sourcing efficiency

Quick Specification Overview

• Material: GCr15, GCr15SiMn
• Grade: G5–G100
• Diameter Range: 1 mm–120 mm
• Surface: Polished / high smoothness

Inquiry Tips (To Quote Faster)

Send us your requirements:

• Diameter (mm/inch) + quantity
• Grade (G5–G100)
• Material (GCr15 or GCr15SiMn)
• Intended application / bearing type
• Packaging needs (bulk / tube / customized)