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R2 ZZThe R2 ZZ bearing is suitable for industries requiring high precision and compact space, such as precision instruments, small motors, medical devices, optical equipment, office automation devices, robotic joints, watchmaking, power tools, and consumer electronics.
Product structure:
The R2 ZZ bearing has an inner diameter of 3.175mm, outer diameter of 9.525mm, and width of 3.967mm. It is made of stainless steel (e.g., AISI 440C), features a single-row deep groove ball design, and is equipped with metal shields on both sides (ZZ indicates dual shields). The cage is typically made of stamped steel or engineering plastic.
Key performance features:
This bearing offers high-speed operation, low friction, corrosion resistance, and dust protection. It is suitable for moderate loads, runs smoothly with low noise, and features stainless steel construction for excellent wear resistance and service life. The shields effectively prevent contaminant ingress, extending maintenance intervals.
Main application scenarios:
It is commonly used in micro motor rotors, drone gimbals, precision gearboxes, metering instrument pointer shafts, computer cooling fans, dental drill heads, 3D printer extruders, and rotating support components in small automation equipment.
Technical Specifications & Requirements
The bearing must comply with ISO 9001 quality standards. Its dynamic load capacity is approximately 0.3kN, static load about 0.1kN, and limiting speed up to 30,000 RPM (grease lubricated). Operating temperature ranges from -30°C to 120°C. Installation requires proper shaft and housing tolerance matching (recommended shaft h5, housing H6), avoidance of overload or impact, and regular lubrication condition checks.
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）: | R2 |
| Shield（防尘盖）: | ZZ |
| Precision Rating（精度等级）: | P5 |
| d（内径）: | 3.175 |
| D（外径）: | 9.525 |
| B1（高）: | 3.967 |
| 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）: | 630 |
| Cor (N) Basic Staticc（基本静负荷）: | 218 |
| Limiting Speed Grase（极限转速润滑脂）*1000rpm: | 56 |
| Limiting Speed Oil（极限转速润滑剂）*1000rpm: | 67 |
| Patents: | True |
| Standard Type: | Standard parts |
