베어링용 강구
깊은 홈, 앵귤러 콘택트, 스러스트, 미니어처 및 선형 모션 베어링을 위한 프리미엄 정밀 베어링 볼입니다. G3 초정밀 등급부터 G1000 상용 등급까지 AISI 52100 크롬강, 440C 스테인리스, 탄소강, 세라믹으로 제공됩니다. 직경 0.3mm ~ 250mm.
모든 용도에 적합한 정밀 베어링 볼
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
인증됨
30년 이상
경험
0.3–250mm
크기 범위
G3–G60
정도
AISI 52100 크롬 스틸
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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
AISI 316 스테인레스 스틸
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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
AISI 440C 스테인레스 스틸
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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 세라믹
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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
AISI 1010/1020 탄소강
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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
베어링 볼 재료
재료 선택에 따라 부하 용량, 속도 등급, 내식성 및 작동 온도 범위가 결정됩니다. 우리는 베어링 응용 분야에 대해 다섯 가지 재료 옵션을 제공합니다.
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
베어링 볼 정밀 등급
정밀 등급은 ISO 3290/ABMA 3 표준에 따라 정의되며 직경 공차, 구형도(실제 원형과의 편차), 표면 거칠기(Ra) 및 로트 균일성을 포함합니다. 등급 번호가 낮을수록 공차가 엄격할수록 정밀도가 높아집니다.
베어링 볼 정밀 등급
당사의 베어링 볼은 볼 베어링 설계의 전체 스펙트럼에 맞게 정밀하게 설계되었습니다.
깊은 홈 볼 베어링
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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
미니어처 베어링
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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
앵귤러 콘택트 베어링
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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
자동 정렬 베어링
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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
스러스트 볼 베어링
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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
리니어 모션 베어링
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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
베어링 볼 정밀 등급
각 베어링 볼은 지정된 등급을 충족하는지 확인하기 위해 엄격하게 제어되는 7단계 프로세스를 거칩니다.
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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.
품질 관리 및 인증
베어링 볼의 모든 배치는 배송 전에 엄격한 품질 관리를 받습니다.
치수검사
직경, 구형도 및 표면 결함에 대한 100% 자동 광학 분류입니다. ANSI/ASQ Z1.4에 따른 통계 샘플링.
경도 테스트
배치별로 Rockwell C 경도가 검증되었습니다. 52100: HRC 60–67. 440C: HRC 57–65. 탄소: HRC 58–65(케이스).
재료 인증
EN 10204 3.1에 따른 MTC. 화학 성분 분석, 미세 구조 및 포함 등급이 포함됩니다.
ISO 9001:2015
공장 품질 관리 시스템이 인증되고 매년 감사를 받습니다. 전체 배치 추적성, 10년 기록 보관.
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