Grinding Steel Ball

Grinding Steel Balls (also known as precision ground steel balls or wear-resistant steel balls) are high-precision wear-resistant media and structural components manufactured from high-quality raw materials such as high-carbon chromium bearing steel, alloy steel, and stainless steel through core processes including forging/casting, heat treatment, multi-stage precision grinding, and polishing. The product boasts outstanding core advantages: high hardness, excellent wear resistance, high dimensional accuracy, superior sphericity, and smooth surface finish. With sphericity error controlled at the micrometer level, it can withstand high-intensity impact, long-term friction, and harsh working conditions. Available in materials including GCr15, 40Cr, 304/316 stainless steel, and high-chromium alloy (Cr12-Cr15) series, with specifications covering 1mm to 150mm, they are widely used in ball mill grinding media, bearing manufacturing, mechanical transmission, mining equipment, precision instruments, automotive industry, chemical equipment, and other fields. They are core basic components ensuring efficient equipment operation, improved grinding efficiency, and extended service life.

Product Features

1. Superior Wear Resistance & Long Service Life：Made of wear-resistant materials such as high-carbon chromium bearing steel (GCr15) and high-chromium alloy, undergoing professional heat treatment processes like quenching and tempering, the hardness reaches HRC 60-65 (HRC 62-68 for high-chromium models), providing excellent compressive strength and wear resistance. Compared to ordinary carbon steel balls, wear resistance is improved by 3-5 times, capable of withstanding high-frequency impact and long-term friction loss. It effectively reduces equipment maintenance frequency and replacement costs, adapting to continuous operation scenarios.

2. Precise Dimensional Accuracy & Excellent Sphericity：Adopting multi-stage precision processing processes of "rough grinding - fine grinding - ultra-fine grinding - polishing", the dimensional tolerance is strictly controlled within ±0.001mm-±0.005mm (precision grade), ±0.01mm-±0.03mm (standard grade), and sphericity error ≤0.002mm. This ensures a perfect fit with supporting components (such as bearing inner/outer rings and grinding chambers), reducing gap friction and energy loss, and improving equipment transmission accuracy or grinding uniformity.

3. Smooth Surface & Stable Performance：The surface roughness is Ra≤0.02μm (polished grade), free of burrs, cracks, scale, pores, and other defects, with excellent rust and corrosion resistance (stainless steel materials or galvanized/chromium-plated/passivated models perform better). Under complex working conditions such as high-speed rotation, heavy load, and humidity, it can maintain stable mechanical properties, not easily deformed or fractured, ensuring continuous and safe operation of equipment.

4. Complete Specifications & Flexible Customization：Regular specifications cover 1mm, 2mm, 3mm, 5mm, 8mm, 10mm, 15mm, 20mm, 30mm…150mm, supporting customization of special sizes (0.5mm-200mm), hardness levels (HRC 55-68), surface treatment methods, and material formulas. Whether it is structural components for small precision instruments or grinding media for large ball mills, precise matching solutions can be provided.

Product Specifications

Application Scenarios

1. Grinding Media Field：As core grinding media for ball mills, crushers, and grinders, widely used in mining (ore grinding), cement manufacturing (raw material grinding), building materials processing (ceramic tile raw material grinding), chemical industry (chemical raw material refinement), coating production (pigment grinding), and other scenarios. High hardness and wear resistance can improve grinding efficiency, reduce media loss, and ensure uniform material grinding.

2. Bearing Manufacturing Industry：As core rolling elements for deep groove ball bearings, self-aligning ball bearings, thrust ball bearings, etc., directly determining the rotation accuracy, load-bearing capacity, and service life of bearings. Suitable for various bearing products such as motor bearings, automotive bearings, industrial bearings, and precision instrument bearings.

3. Mechanical Transmission & Automotive Industry：Used in transmission components such as gearboxes, drive shafts, clutches, automotive hubs, and engine accessories. With excellent wear resistance and stability, it reduces energy loss during transmission, improving mechanical efficiency and driving safety.

4. Precision Instruments & Electronic Equipment：Adaptable to precision meters, medical devices, aerospace accessories, electronic equipment, robot joints, etc. The micrometer-level dimensional accuracy and sphericity can meet the high-precision operation requirements of high-end equipment, ensuring instrument measurement accuracy and equipment stability.

5. Other Industrial Fields：In industries such as printing machinery, textile machinery, construction machinery, hydraulic equipment, and valve manufacturing, serving as rolling, supporting, guiding, or sealing components, playing core roles in wear resistance, transmission, and positioning, adapting to various complex working conditions.