Bolas de acero para rodamientos.
Bolas de rodamientos de precisión de primera calidad para rodamientos de ranura profunda, de contacto angular, de empuje, en miniatura y de movimiento lineal. Disponible en acero cromado AISI 52100, acero inoxidable 440C, acero al carbono y cerámica, desde súper precisión G3 hasta grado comercial G1000. 0,3 mm a 250 mm de diámetro.
Bolas con rodamientos de precisión para cada aplicación
Ball bearings are the most widely used rolling-element bearing in the world — and at their heart lies the bearing ball. The performance, lifespan, and reliability of any ball bearing depend directly on the quality of its balls: dimensional accuracy, sphericity, surface finish, and material integrity.
At Jiaxin Steel Ball, we have manufactured precision bearing balls for over 30 years, supplying Fortune 500 bearing manufacturers, automotive Tier 1 suppliers, and precision equipment OEMs across 40+ countries. Our bearing balls are produced to ISO 3290 / ABMA 3 standards and certified under ISO 9001:2015.
We produce over 500 million bearing balls annually, covering the full spectrum from miniature balls (0.3 mm) for micro bearings to large-diameter balls (250 mm) for heavy industrial slewing rings.
ISO 9001
Certificado
Más de 30 años
Experiencia
0.3–250mm
Rango de tamaño
G3–G60
Precisión
Acero Cromado AISI 52100
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Hardness (HRC): 60–67
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Max Operating Temp: 150°C (300°F)
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Corrosion Resistance: Low
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Best For: General purpose, high-load bearings, automotive, electric motors
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Common Grades: G10, G16, G25, G40
Acero Inoxidable AISI 316
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Hardness (HRC): 25–35 (annealed)
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Max Operating Temp: 200°C (390°F)
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Corrosion Resistance: Very High
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Best For: Chemical processing, offshore, highly corrosive environments
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Common Grades: G100, G200
Acero Inoxidable AISI 440C
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Hardness (HRC): 57–65
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Max Operating Temp: 200°C (390°F)
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Corrosion Resistance: High
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Best For: Corrosive environments, food processing, marine, medical
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Common Grades: G10, G16, G25, G40
Si₃N₄ Cerámica
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Hardness (HRA): 75–80
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Max Operating Temp: 800°C+ (1470°F+)
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Corrosion Resistance: Excellent
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Best For: Ultra-high-speed spindles, non-magnetic, vacuum, high-temp
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Common Grades: G5, G10, G16
Acero al Carbono AISI 1010/1020
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Hardness (HRC): 58–65 (case)
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Max Operating Temp: 120°C (250°F)
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Corrosion Resistance: Low
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Best For: Low-speed, high-load industrial bearings, agriculture
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Common Grades: G100, G200, G500
Materiales de bolas para rodamientos
La selección del material determina la capacidad de carga, la velocidad nominal, la resistencia a la corrosión y el rango de temperatura de funcionamiento. Ofrecemos cinco opciones de materiales para aplicaciones de rodamientos:
Material Selection Guide
The most common bearing ball material is AISI 52100 chrome steel (1.3505 / 100Cr6), offering the best balance of hardness, wear resistance, and cost. For corrosive environments, upgrade to AISI 440C stainless steel. For the highest speeds and temperatures, silicon nitride (Si₃N₄) ceramic balls — 40% lighter than steel with hardness exceeding HRC 78 — deliver superior performance at a premium.
GRADE G3
Tolerance: ±0.08 µm · Sphericity: 0.08 µm · Ra: 0.012 µm
Best for: Ultra-precision spindles, aerospace gyroscopes
Grade G10
Tolerance: ±0.25 µm · Sphericity: 0.25 µm · Ra: 0.016 µm
Best for: Precision bearings, automotive wheel hubs
Grade G25
Tolerance: ±0.65 µm · Sphericity: 0.65 µm · Ra: 0.030 µm
Best for: General industrial bearings, conveyors
Grade G200–G1000
Tolerance: ±5–25 µm · Sphericity: 5–25 µm · Ra: 0.12–0.30 µm
Best for: Low-speed, high-load, construction equipment
Grade G5
Tolerance: ±0.13 µm · Sphericity: 0.13 µm · Ra: 0.014 µm
Best for: Machine tool spindles, high-speed bearings
Grade G16
Tolerance: ±0.25 µm · Sphericity: 0.25 µm · Ra: 0.016 µm
Best for: Precision bearings, automotive wheel hubs
Grade G40
Tolerance: ±1.0 µm · Sphericity: 1.0 µm · Ra: 0.050 µm
Best for: Agricultural equipment, fans, blowers
Grade G100
Tolerance: ±2.5 µm · Sphericity: 2.5 µm · Ra: 0.080 µm
Best for: Heavy-duty industrial, mining, crushers
Grados de precisión para rodamientos de bolas
Los grados de precisión están definidos por las normas ISO 3290/ABMA 3, que cubren la tolerancia del diámetro, la esfericidad (desviación del redondo verdadero), la rugosidad de la superficie (Ra) y la uniformidad del lote. Número de grado más bajo = tolerancia más estricta = mayor precisión.
Grados de precisión para rodamientos de bolas
Nuestras bolas de rodamiento están diseñadas con precisión para todo el espectro de diseños de rodamientos de bolas:
Rodamientos rígidos de bolas
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Typical Material: 52100 Chrome
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Common Grade: G10–G40
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Diameter Range: 0.3 – 80 mm
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Key Requirements: High sphericity,, good hardness
Rodamientos en miniatura
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Typical Material: 440C, Si₃N₄
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Common Grade: G3–G10
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Diameter Range: 0.3 – 10 mm
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Key Requirements: Ultra-precision, low noise, consistent dimensions
Rodamientos de contacto angular
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Typical Material: 52100, 440C
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Common Grade: G5–G16
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Diameter Range: 1 – 50 mm
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Key Requirements: Tight diameter tolerance, excellent surface finish
Rodamientos autoalineantes
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Typical Material: 52100, 440C
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Common Grade: G16–G40
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Diameter Range: 2 – 100 mm
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Key Requirements: Good sphericity, moderate precision
Rodamientos de bolas de empuje
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Typical Material: 52100, Carbon
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Common Grade: G25–G100
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Diameter Range: 3 – 150 mm
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Key Requirements: High compressive strength, wear resistance
Rodamientos de movimiento lineal
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Typical Material: 52100, 440C
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Common Grade: G10–G25
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Diameter Range: 1 – 40 mm
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Key Requirements: Excellent roundness, smooth surface, consistent lot quality
Grados de precisión para rodamientos de bolas
Cada bola de rodamiento se somete a un proceso de 7 etapas estrictamente controlado para garantizar que cumpla con su grado especificado:
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Cold Heading / Forging — Wire rod (52100, 440C, or specified alloy) is cut and cold-formed into rough spherical blanks.
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Flashing (Soft Grinding) — The flash line from heading is removed; ball is brought close to final diameter.
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Heat Treatment — Through-hardening for 52100 (850°C quench + temper) or case-hardening for carbon steel. 440C receives precipitation hardening for optimal corrosion resistance.
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Hard Grinding — Parallel plate grinders refine size and sphericity to within grade tolerance.
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Lapping & Polishing — Final surface finish achieved using abrasive compounds. Target Ra reached for specified grade.Inspection & Sorting — 100% automated optical sorting. Dimensional, hardness, and microstructure verification per ANSI/ASQ Z1.4 sampling plans.
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Cleaning & Packaging — Ultrasonic cleaning, rust-prevention oil coating, sealed packaging per customer spec. Full material traceability with batch records retained 10+ years.
Control de calidad y certificaciones
Cada lote de bolas de rodamiento se somete a un riguroso control de calidad antes del envío:
Inspección dimensional
Clasificación óptica 100% automatizada por diámetro, esfericidad y defectos superficiales. Muestreo estadístico según ANSI/ASQ Z1.4.
Pruebas de dureza
Dureza Rockwell C verificada por lote. 52100: CDH 60–67. 440C: HRC 57–65. Carbono: HRC 58–65 (caja).
Certificación de materiales
MTC según EN 10204 3.1. Se incluyen análisis de composición química, microestructura y clasificación de inclusión.
ISO 9001:2015
Sistema de gestión de calidad de fábrica certificado y auditado anualmente. Trazabilidad completa del lote, retención de registros durante 10 años.
Standards Compliance
Our bearing balls comply with the following international standards:
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ISO 3290-1 — Steel balls for rolling bearings
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ABMA 3 / ANSI B3.3 — American bearing ball standard
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DIN 5401 — German bearing ball standard
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JIS B 1501 — Japanese standard for steel balls
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GBT 308.1 — Chinese national standard