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Key applicable industries include: small motors (such as fan motors, stepper motors, servo motors), office automation equipment (such as printers, scanners, copiers), household appliances (such as food processors, vacuum cleaners), precision instruments and meters, model toys (such as RC aircraft, remote control cars), as well as various light-duty transmission equipment and auxiliary medical devices.
Product Structure
The U604 ZZ is a standard miniature deep groove ball bearing in the metric dimension series. Its core dimensional parameters are: bore diameter (d) 4mm, outer diameter (D) 13mm, and width (B) 4mm. Structurally, it is made of high-quality chrome steel (GCr15). The internal structure consists of a single row of precision-ground steel balls and a cage. It is equipped with double-sided pressed steel shields (ZZ type), which effectively prevent the ingress of dust and debris while retaining the pre-lubricating grease inside.
Key Performance Features of U604 ZZ
The main performance features of this bearing are high rotational speed, low friction, low operating noise, and long service life. Its deep groove raceway design enables it to withstand radial loads and moderate bidirectional axial loads simultaneously. The double metal shields (ZZ) provide good sealing, making it suitable for dusty environments and requiring no maintenance. Benefiting from precise manufacturing processes, the U604 ZZ operates smoothly and is an ideal choice for equipment requiring high reliability and quiet operation.
Main Application Scenarios
In terms of application scenarios, the U604 ZZ bearing is commonly found in various rotating components with a 4mm shaft diameter. For example, it serves as the main shaft support in small AC or DC motors, ensuring smooth high-speed operation; used in the paper feed roller shafts of printers or scanners for precise transmission; installed at both ends of the rotor in food mixers or handheld power tools to withstand radial loads; and frequently used in pulleys, gears, or turntables of transmission mechanisms to provide flexible rotational support.
Technical Specifications and Requirements
This product is manufactured in accordance with the GB/T 276 standard (equivalent to ISO 15). Its dimensional tolerances meet the Normal class (P0 class, or ABEC 1) accuracy requirements, sufficient for the vast majority of general applications. Proper dimensional accuracy and tolerance fits for the shaft and housing must be ensured during installation. The bearing is pre-lubricated with high-quality lithium-based grease and is ready for use under normal environmental temperatures. It should not be used in extreme conditions involving high speed, high temperature, or chemical corrosion. During installation, avoid direct impact on the shields or applying improper axial force.
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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）: | U604 |
| Shield（防尘盖）: | ZZ |
| Precision Rating（精度等级）: | P5 |
| d（内径）: | 4 |
| D（外径）: | 13 |
| B（高）: | 4 |
| Material（材料）: | GCr15铬钢 |
| Lubrication（润滑方式(定制)）: | 联系客服Contact Customer Service |
| Standard Type: | Standard parts |
