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R188The R188 bearing, as a precision miniature deep groove ball bearing, is primarily suitable for industries with high requirements for dimensional accuracy, smooth operation, and reliability. These include instrumentation, micro motors, medical equipment, optical devices, precision machinery, model toys, office automation equipment, small household appliances, and various portable electronic products.
Product structure:
The R188 bearing features a standard miniature deep groove ball bearing structure with main dimensions of 8mm inner diameter, 12.7mm outer diameter, and 3.175mm width. It is typically manufactured from stainless steel (e.g., AISI 440C) or high-carbon chrome steel, consisting of an outer ring, an inner ring, a set of precision steel balls, and a cage (usually made of nylon or brass). It is available in open or sealed forms (e.g., with ZZ shields or 2RS rubber seals).
Key performance features:
This bearing is characterized by its small size, light weight, high rotational speed, low frictional resistance, and smooth, quiet operation. The stainless steel version offers excellent rust and corrosion resistance. Its precision machining ensures high rotational accuracy and low runout. It can withstand moderate radial loads and bidirectional axial loads, features low starting torque, and is suitable for high-speed applications.
Main application scenarios:
The R188 bearing is commonly used in micro motors (e.g., drone motors, small fans), precision instruments (e.g., measuring devices, optical encoders), office equipment (e.g., printer/scanner paper feed rollers), precision model toys (e.g., remote-control car gearboxes), medical devices (e.g., dental handpieces, micro-pumps), personal care appliances (e.g., electric shavers, beauty devices), and various mechanisms requiring efficient rotational transmission in compact spaces.
Technical Specifications and Requirements
The product generally complies with the ISO 9001 quality management system, with dimensions meeting ABEC-1 or higher tolerance classes (e.g., ABEC-3/5 for higher precision requirements). The dynamic load rating (C) and static load rating (C0) must meet design specifications. The operating temperature range varies with material; stainless steel bearings typically range from -30°C to +120°C (with grease lubrication). Appropriate grease (e.g., low-torque grease for high speeds) should be selected based on specific operating conditions. A clean installation environment is essential, and excessive impact loads or misalignment should be avoided.
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）: | R188 |
| Shield（防尘盖）: | Open |
| Precision Rating（精度等级）: | P5 |
| d（内径）: | 6.35 |
| D（外径）: | 12.7 |
| B（高）: | 3.175 |
| Material（材料）: | GCr15铬钢 |
| Lubrication（润滑方式(定制)）: | 联系客服Contact Customer Service |
| r（倒角）: | 0.15 |
| Cr (N) Basic Dynamic（基本动负荷）: | 1080 |
| Cor (N) Basic Staticc（基本静负荷）: | 440 |
| Limiting Speed Grase（极限转速润滑脂）*1000rpm: | 40 |
| Limiting Speed Oil（极限转速润滑剂）*1000rpm: | 50 |
| Patents: | True |
| Standard Type: | Standard parts |
