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R2A ZZThe R2A ZZ bearing is widely used in precision instruments, small motors, household appliances, medical devices, office equipment, automation devices, and food processing equipment. It is suitable for applications requiring hygienic conditions, corrosion resistance, and low noise.
Product structure:
This bearing features a deep groove ball structure with an inner diameter of 3.175mm, outer diameter of 12.7mm, and width of 4.366mm. It is made of stainless steel and equipped with ZZ-type metal shields on both sides to effectively prevent contamination. The precision steel balls and smooth raceway design ensure smooth operation.
Key performance features:
It offers excellent rust and corrosion resistance, making it suitable for damp or mildly corrosive environments. The ZZ shields provide basic dust protection, extending service life. The low-friction design supports high-speed rotation (up to 30,000 rpm or more), operates quietly, and requires minimal lubrication. With a compact structure and balanced load capacity, it is ideal for light to medium-duty applications.
Main application scenarios:
It is commonly used in small DC motors, fan rotors, encoders, stepper motors, precision gearboxes, measuring instruments, camera gimbals, small pumps, and household appliances (e.g., blenders, coffee makers). It is suitable for precision mechanical components requiring stable rotation and long service life.
Technical Specifications & Requirements
Compliant with ISO 9001 quality management standards. Dynamic load rating ≥0.38 kN, static load rating ≥0.16 kN. Operating temperature range: -30°C to +120°C. Recommended for use in clean environments, avoiding strong impact or overload. During installation, ensure precise fit between the shaft and housing to prevent misalignment or compression. For high-speed applications, moderate grease lubrication is recommended to reduce wear.
Inch Size Miniature Ball Bearings inner diameter 1.984-38.1mm / 英制微型系列轴承内径1.984-38.1mm
| 内径 | 外径 | 高度 | 倒角 | 基本 | 基本 | 极限转速 | 型号 | |||
| 动负荷 | 静负荷 | Limiting Speed | (Reference) | |||||||
| (D) | (D) | 开放型 | 防尘盖型 | (r) | Cr(N)Basic | Cor(N)Basic |
润滑脂 (Grase) |
润滑剂 (Oil) |
开放型 | 防尘盖型 |
|
(B) (Open) |
(B1) (Shield) |
Dynamic | Static | *1000rpm | (Open) | (Shield) | ||||
| 1.984 | 6.35 | 2.38 | 3.571 | 0.1 | 310 | 108 | 67 | 80 | R1-4 | R1-4ZZS |
| 2.38 | 4.762 | 1.588 | 2.38 | 0.1 | 188 | 60 | 80 | 95 | R133 | R133ZZS |
| 7.938 | 2.779 | 3.571 | 0.15 | 550 | 175 | 60 | 71 | R1-5 | R1-5ZZS | |
| 3.175 | 6.35 | 2.38 | 2.779 | 0.1 | 283 | 95 | 67 | 80 | R144 | R144ZZ |
| 7.938 | 2.779 | 3.571 | 0.1 | 550 | 180 | 60 | 67 | R2-5 | R2-5ZZ | |
| 9.525 | 2.779 | 3.571 | 0.15 | 640 | 225 | 53 | 63 | R2-6 | R2-6ZZ | |
| 9.525 | 3.967 | 3.967 | 0.3 | 630 | 218 | 56 | 67 | R2 | R2ZZ | |
| 12.7 | 4.366 | 4.366 | 0.3 | 640 | 225 | 53 | 63 | R2A | R2AZZ | |
| 3.967 | 7.938 | 2.779 | 3.175 | 0.1 | 360 | 149 | 53 | 63 | R155 | R155ZZS |
| 4.762 | 7.938 | 2.779 | 3.175 | 0.1 | 360 | 149 | 53 | 63 | R156 | R156ZZS |
| 9.525 | 3.175 | 3.175 | 0.1 | 710 | 270 | 50 | 60 | R166 | R166ZZ | |
| 12.7 | 3.967 | 4.978 | 0.3 | 1300 | 485 | 43 | 53 | R3 | R3ZZ | |
| 15.875 | 4.978 | 4.978 | 0.3 | 1310 | 485 | 43 | 53 | R3A | R3AZZ | |
| 6.35 | 9.525 | 3.175 | 3.175 | 0.1 | 375 | 173 | 48 | 56 | R168 | R168ZZS |
| 12.7 | 3.175 | 4.762 | 0.15 | 1080 | 440 | 40 | 50 | R188 | R188ZZ | |
| 15.875 | 4.978 | 4.978 | 0.3 | 1610 | 660 | 38 | 45 | R4B | R4BZZ | |
| 15.875 | 4.978 | 4.978 | 0.3 | 1480 | 615 | 38 | 45 | R4 | R4ZZ | |
| 19.05 | 5.558 | 7.142 | 0.4 | 2340 | 885 | 36 | 43 | R4A | R4AZZ | |
| 7.938 | 12.7 | 3.967 | 3.967 | 0.15 | 540 | 276 | 40 | 48 | R1810 | R1810ZZS |
| 9.525 | 22.225 | 5.558 | 7.142 | 0.4 | 3350 | 1410 | 32 | 38 | R6 | R6ZZ |
| 15.875 | 3.967 | 3.967 | 0.4 | 815 | 411 | 28 | 31 | R1038 | R1038ZZ | |
| 12.7 | 19.05 | 3.967 | 3.967 | 0.4 | 898 | 524 | 21 | 26 | R1212 | R1212ZZ |
| 28.575 | 6.35 | 7.938 | 0.4 | 3930 | 2230 | 24 | 29 | R8 | R8ZZ | |
| 15.875 | 34.925 | 7.144 | 8.731 | 0.8 | 4620 | 2790 | 36 | 40 | R10 | R10ZZ |
| 19.05 | 41.275 | 7.938 | 11.113 | 0.8 | 7240 | 4463 | 41 | 43 | R12 | R12ZZ |
| 22.225 | 47.625 | 9.525 | 12.7 | 0.8 | 7740 | 4960 | 40 | 42 | R14 | R14ZZ |
| 25.4 | 50.8 | 9.525 | 12.7 | 0.8 | 7740 | 5160 | 38 | 45 | R16 | R16ZZ |
| 28.575 | 53.975 | 9.525 | 12.77 | 0.8 | 10180 | 6910 | 28 | 45 | R18 | R18ZZ |
| 31.75 | 57.15 | 9.525 | 12.7 | 0.8 | 10800 | 7520 | 28 | 33 | R20 | R20ZZ |
| 34.925 | 63.5 | 11.112 | 14.288 | 0.8 | 12280 | 8500 | 30 | 38 | R22 | R22ZZ |
| 38.1 | 63.5 | 11.112 | 14.288 | 0.8 | 14350 | 10240 | 32 | 40 | R24 | R24ZZ |
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宁波轴心国际贸易有限公司成立于2025年，总部位于中国东部沿海开放城市宁波，专注轴承及五金配件领域的技术开发与全球销售。依托母公司雄厚的制造基础——12000㎡现代化生产厂房、70+自动化产线、100+专业技术团队，10+年精密制造经验，并通过ISO/RoHS/CE认证，产品广泛应用于家电、食品机械、健身器材、电动工具、机动车辆、医用器械 企业核心优势：
| Model（型号）: | R2A |
| Shield（防尘盖）: | ZZ |
| Precision Rating（精度等级）: | P5 |
| d（内径）: | 3.175 |
| D（外径）: | 12.7 |
| B1（高）: | 4.366 |
| Material（材料）: | GCr15铬钢 |
| Lubrication（润滑方式(定制)）: | 联系客服Contact Customer Service |
| r（倒角）: | 0.3 |
| Cr (N) Basic Dynamic（基本动负荷）: | 640 |
| Cor (N) Basic Staticc（基本静负荷）: | 225 |
| Limiting Speed Grase（极限转速润滑脂）*1000rpm: | 53 |
| Limiting Speed Oil（极限转速润滑剂）*1000rpm: | 63 |
| Patents: | True |
| Standard Type: | Standard parts |
