SKF 618/9 9x17x4 - Deep-Groove Ball Bearing

Main Description:

The SKF 618/9 9x17x4 deep-groove ball bearing is engineered for compact drives, small motors, gearboxes, pumps, fans, and precision equipment where minimal space, reliable rotation, and long service life are essential. Popular English-language search queries for this product and similar bearings include “bearing 9x17x4,” “mini motor bearing 9x17x4,” “small deep groove bearing,” “SKF 618/9,” “compact ball bearing for gearbox,” and “bearing 9mm shaft.” These terms reflect the real market demand for small-dimension but robust bearings that suit tight housing and precise mechanical designs.

With its 9 mm bore, 17 mm outer diameter, and 4 mm width, this bearing is ideal for integration into small assemblies where standard bearings are too large. It fits in compact electric motors, small gear reducers, precision tools, instrumentation, small pumps, fans, and lightweight industrial applications. The dimension and geometry allow designers to minimize the footprint without compromising bearing function.

As a regular deep-groove ball bearing, SKF 618/9 supports radial loads and moderate axial loads in both directions. Its simple but efficient internal design ensures low friction, smooth rotation, stable shaft guidance, and quiet, energy-efficient operation. These features are critical in small motors, portable devices, automation components, and miniature mechanical units.

For procurement and maintenance teams, this bearing offers a cost-effective, reliable, high-precision solution — especially where compactness and longevity are required. Embedded keywords such as “compact ball bearing,” “miniature motor bearing,” “deep-groove bearing 9x17x4,” “industrial small bearing,” “lightweight drive bearing,” and “precision bearing 9 mm shaft” align with customer search intent and reinforce SEO potential for global and English-language traffic.

Technical Specifications & Features:

• Bearing type: Single-row deep-groove ball bearing (compact / miniature)

• Dimensions: 9 x 17 x 4 mm (bore x outer diameter x width)

• Load capacity: radial loads, moderate axial loads in both directions

• Typical applications: small motors, gearboxes, pumps, fans, compact drives, automation, precision tools, small industrial machines

• Performance: low friction, smooth rotation, stable shaft support, durable operation

Key Advantages

• Compact dimensions - suitable for devices and assemblies with limited space.

• Versatile load handling - supports radial and moderate axial loads, enabling flexible design.

• Smooth, quiet operation - ideal for motors, fans, and precision equipment.

• Durable performance - designed for long service life even under continuous operation.

• Wide application range - from small electric drives to automation and lightweight industrial machines.

FAQ

Q: What makes the bearing 9x17x4 useful in small motors?
A: Its miniature size allows fitting into tight housings while maintaining reliable rotation, low friction and good load handling.

Q: What types of loads can 618/9 carry?
A: Primarily radial loads, and moderate axial loads in both directions — enough for many small-scale drives and gearboxes.

Q: Is this bearing suitable for pumps or fans?
A: Yes — its compactness, stable rotation and low friction make it well-suited for small pumps, fans, and lightweight rotating devices.

Q: Does compact bearing mean weaker performance?
A: Not necessarily. While designed for smaller applications, 618/9 delivers reliable performance, stable shaft guidance and long service life when used within its load and speed limits.

Q: In which industries can 9x17x4 bearings be used?
A: Industrial automation, small machinery, household appliances, power tools, pumps, ventilation and air-handling units, and other sectors needing compact, reliable bearings.