Description of Product
Ground Steel Balls (also known as precision ground steel balls or forged steel balls) are high-precision wear-resistant components manufactured from high-quality raw materials such as high-carbon chromium bearing steel and alloy steel through multiple core processes including forging, heat treatment, precision grinding, and polishing. Featuring high hardness, excellent wear resistance, high dimensional accuracy, and superior surface finish, the products have a sphericity error controlled at the micrometer level and can withstand high-intensity impact and long-term friction loss. Available in materials including GCr15, 40Cr, and stainless steel series, with specifications covering 3mm to 100mm, they are widely used in bearing manufacturing, mechanical transmission, mining equipment, grinding machinery, automotive industry, precision instruments, and other fields. They are core basic components ensuring efficient, stable, and long-life operation of mechanical equipment.
High Strength & Hardness, Wear-Resistant & Durable: Made of high-quality materials such as GCr15 high-carbon chromium bearing steel, undergoing heat treatment processes like quenching and tempering, the hardness reaches HRC 60-65. It possesses excellent compressive strength and wear resistance, capable of withstanding high-frequency impact and friction under harsh working conditions. The service life is far longer than ordinary carbon steel forgings, effectively reducing equipment maintenance frequency and replacement costs.
Precise Dimensional Accuracy & Excellent Sphericity: Adopting multiple precision grinding and polishing processes, the dimensional tolerance is strictly controlled within ±0.001mm-±0.005mm, and the sphericity error is ≤0.002mm. This ensures a perfect fit with supporting components, reducing gap friction and energy loss during operation, and improving the transmission efficiency and operational stability of mechanical equipment.
Smooth Surface & Stable Performance: The surface roughness is Ra≤0.02μm, free of burrs, cracks, scale, and other defects, with strong rust resistance (stainless steel materials or galvanized/chromium-plated models perform better). Under high-speed rotation and heavy-load working conditions, it can maintain stable mechanical properties, not easily deformed or fractured, ensuring continuous and safe operation of equipment.
Complete Specifications & Strong Customization: Regular specifications cover 3mm, 5mm, 8mm, 10mm, 15mm, 20mm, 30mm…100mm, supporting customization of special sizes, hardness levels, and surface treatment methods according to customer needs. It adapts to the installation requirements of equipment in different industries, providing matching solutions for both small precision instruments and large mining machinery.
| Specification Parameters | Detailed Description |
|---|
| Material Type | GCr15 high-carbon chromium bearing steel, 40Cr alloy steel, 304/316 stainless steel, carbon steel, etc. |
| Diameter Range | 3mm-100mm (regular specifications), special sizes customizable |
| Hardness Range | HRC 58-65 (regular models), different hardness levels achievable by adjusting heat treatment processes as required |
| Dimensional Tolerance | ±0.001mm-±0.005mm (precision grade), ±0.01mm-±0.03mm (standard grade) |
| Sphericity | ≤0.002mm (precision grade), ≤0.005mm (standard grade) |
| Surface Roughness | Ra≤0.02μm (polished grade), Ra≤0.1μm (ground grade) |
| Surface Treatment | Precision polishing, galvanizing, chromium plating, black oxide treatment, passivation treatment |
| Packaging Specifications | 20kg/barrel, 50kg/barrel (moisture-proof and rust-proof packaging); Custom packaging available for bulk orders with bilingual (Chinese-English) specification labels |
Bearing Manufacturing Industry: As core rolling elements for deep groove ball bearings, self-aligning ball bearings, thrust ball bearings, etc., the high precision and wear resistance of ground steel balls directly determine the rotation accuracy, load-bearing capacity, and service life of bearings. They are widely used in various bearing products such as motor bearings, automotive bearings, and industrial bearings.
Mechanical Transmission & Automotive Industry: Used in transmission components such as gearboxes, drive shafts, and clutches, as well as automotive hubs and engine accessories. With excellent wear resistance and stability, it reduces energy loss during transmission, improving mechanical efficiency and driving safety.
Mining & Grinding Equipment: Adaptable to ball mills, crushers, grinders, and other equipment for grinding and crushing materials such as ores, building materials, and chemical raw materials. The high-hardness material can withstand high-intensity impact and friction, improving grinding efficiency and equipment production capacity.
Precision Instruments & Electronic Equipment: Used in precision meters, medical devices, aerospace accessories, electronic equipment, 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.
Other Industrial Fields: Also widely applied in industries such as printing machinery, textile machinery, construction machinery, and hydraulic equipment. As rolling, supporting, and guiding components, they play core roles in wear resistance, transmission, and positioning, adapting to various complex working conditions.
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